+publisher:"Texas A&M University" +contributor:("Yang, Ping")

Texas A&M University

1. Meng, Zhaokai. Light Scattering Problem and its Application in Atmospheric Science.

Degree: MS, Physics, 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8914

► The light scattering problem and its application in atmospheric science is studied in this thesis. In the first part of this thesis, light scattering theory… (more)

▼ The light scattering problem and its application in atmospheric science is studied in this thesis. In the first part of this thesis, light scattering theory of single irregular particles is investigated. We first introduce the basic concepts of the light scattering problem. T-matrix ansatz, as well as the null-field technique, are introduced in the following sections. Three geometries, including sphere, cylinder and hexagonal column, are defined subsequently. Corresponding light scattering properties (i.e., T-matrix and Mueller Matrix) of those models with arbitrary sizes are simulated via the T-matrix method. In order to improve the efficiency for the algorithms of single-light scattering, we present a user-friendly database software package of the single-scattering properties of individual dust-like aerosol particles. The second part of this thesis describes this database in detail. Its application to radiative transfer calculations in a spectral region from ultraviolet (UV) to far-infrared (far-IR) is introduced as well. To expand the degree of morphological freedom of the commonly used spheroidal and spherical models, triaxial ellipsoids were assumed to be the overall shape of dust-like aerosol particles. The software package allows for the derivation of the bulk optical properties for a given distribution of particle microphysical parameters (i.e., refractive index, size parameter and two aspect ratios). The array-oriented single-scattering property data sets are stored in the NetCDF format. The third part of this thesis examines the applicability of the tri-axial ellipsoidal dust model. In this part, the newly built database is equipped in the study. The precomputed optical properties of tri-axial models are imported to a polarized addingdoubling radiative transfer (RT) model. The radiative transfer property of a well-defined atmosphere layer is consequently simulated. Furthermore, several trial retrieval procedures are taken based on a combination of intensity and polarization in the results of RT simulation. The retrieval results show a high precision and indicate a further application in realistic studies. Advisors/Committee Members: Yang, Ping (advisor), Kattawar, George W. (advisor), Fry, Edward (committee member).

Subjects/Keywords: Light Scattering; T-matrix; Aerosol; Database; Radiative Transfer

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Meng, Z. (2011). Light Scattering Problem and its Application in Atmospheric Science. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8914

Chicago Manual of Style (16^th Edition):

Meng, Zhaokai. “Light Scattering Problem and its Application in Atmospheric Science.” 2011. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8914.

MLA Handbook (7^th Edition):

Meng, Zhaokai. “Light Scattering Problem and its Application in Atmospheric Science.” 2011. Web. 08 Mar 2021.

Vancouver:

Meng Z. Light Scattering Problem and its Application in Atmospheric Science. [Internet] [Masters thesis]. Texas A&M University; 2011. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8914.

Council of Science Editors:

Meng Z. Light Scattering Problem and its Application in Atmospheric Science. [Masters Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8914

Texas A&M University

2. Baugher, Elizabeth. Comparison between Model Simulations and Measurements of Hyperspectral Far- infrared Radiation from FIRST during the RHUBC-II Campaign.

Degree: MS, Atmospheric Sciences, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10404

► Surface downward far-infrared (far-IR) spectra were collected from NASA’s Far-Infrared Spectroscopy of the Troposphere (FIRST) instrument from August to October 2009 at an altitude of… (more)

Subjects/Keywords: radiation; clouds; RHUBC-II

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Baugher, E. (2012). Comparison between Model Simulations and Measurements of Hyperspectral Far- infrared Radiation from FIRST during the RHUBC-II Campaign. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10404

Chicago Manual of Style (16^th Edition):

Baugher, Elizabeth. “Comparison between Model Simulations and Measurements of Hyperspectral Far- infrared Radiation from FIRST during the RHUBC-II Campaign.” 2012. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10404.

MLA Handbook (7^th Edition):

Baugher, Elizabeth. “Comparison between Model Simulations and Measurements of Hyperspectral Far- infrared Radiation from FIRST during the RHUBC-II Campaign.” 2012. Web. 08 Mar 2021.

Vancouver:

Baugher E. Comparison between Model Simulations and Measurements of Hyperspectral Far- infrared Radiation from FIRST during the RHUBC-II Campaign. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10404.

Council of Science Editors:

Baugher E. Comparison between Model Simulations and Measurements of Hyperspectral Far- infrared Radiation from FIRST during the RHUBC-II Campaign. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10404

Texas A&M University

3. Henning, William Lark. Rigorous Testing of the Rapid Radiative Transfer Model Across the Infrared Spectrum.

Degree: MS, Atmospheric Sciences, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/156944

► Global circulation models (GCMs) and climate simulations often use radiative fluxes and heating rates from radiative transfer models. However, the calculations that are used are… (more)

Subjects/Keywords: radiative; transfer; radiation; model; clouds; cirrus; carbon; dioxide; RRTM

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Henning, W. L. (2016). Rigorous Testing of the Rapid Radiative Transfer Model Across the Infrared Spectrum. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156944

Chicago Manual of Style (16^th Edition):

Henning, William Lark. “Rigorous Testing of the Rapid Radiative Transfer Model Across the Infrared Spectrum.” 2016. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/156944.

MLA Handbook (7^th Edition):

Henning, William Lark. “Rigorous Testing of the Rapid Radiative Transfer Model Across the Infrared Spectrum.” 2016. Web. 08 Mar 2021.

Vancouver:

Henning WL. Rigorous Testing of the Rapid Radiative Transfer Model Across the Infrared Spectrum. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/156944.

Council of Science Editors:

Henning WL. Rigorous Testing of the Rapid Radiative Transfer Model Across the Infrared Spectrum. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/156944

Texas A&M University

4. Evrard, Rebecca Lynn. A Validation of the VIIRS Fast Radiative Transfer Model via Brightness Temperature Analysis in Longwave Infrared Channels.

Degree: MS, Atmospheric Sciences, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/158099

► Clouds cover at least two thirds of the Earth at any given time. Clouds play a large role in the Earth’s global energy budget, but… (more)

▼ Clouds cover at least two thirds of the Earth at any given time. Clouds play a large role in the Earth’s global energy budget, but the impact of cirrus clouds is still widely questioned and researched. Cirrus clouds reside high in the atmosphere where temperatures are so cold that the cloud particles are comprised of ice crystals rather than water droplets. Gaining a better understanding of ice cloud optical properties and the distribution of cirrus clouds provides an explanation for the contribution of cirrus clouds to the global energy budget. Using remote sensing techniques in conjunction with radiative transfer models (RTMs), accurate simulations of cirrus clouds can enhance the understanding of the global energy budget as well as improve the use of global climate models. Prior to their use, RTMs must be tested for accuracy and sensitivity to various cloud optical property (COP) pairs. A well validated RTM such as the Line-By-Line Radiative Transfer Model plus the Discrete Ordinates Radiative Transfer Program (LBLRTM + DISORT) is compared to a newer, faster RTM such as the Visible Infrared Imager Radiometer Suite (VIIRS) Fast Radiative Transfer Model (VFRTM). By comparing brightness temperature (BT) simulations from both models, the accuracy of the VFRTM can be obtained. Based on previous studies, a root mean square error (RMSE) < 0.5 K for brightness temperature difference (BTD) analysis is an appropriate level of error. This study shows RMSE < 0.2 K for BTD using reanalysis data for atmospheric profiles rather than idealized profiles and updated ice particle habit information from the Moderate-resolution Imaging Spectroradiometer (MODIS) Collection 6 (C6). At a higher resolution, the simulated results of the VFRTM are compared to the observations of VIIRS to further indicate the accuracy of the model for use on a global scale as well as to validate the use of MODIS C6 data. RMSE results for the given case study represent < 1.5% error from the VFRTM for all cases. The VFRTM is validated and is an appropriate RTM to use for global cloud retrievals to help improve and update the global energy budget and global climate models. Advisors/Committee Members: Yang, Ping (advisor), Bowman, Kenneth (advisor), Fillipi, Anthony (committee member).

Subjects/Keywords: radiative transfer

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Evrard, R. L. (2016). A Validation of the VIIRS Fast Radiative Transfer Model via Brightness Temperature Analysis in Longwave Infrared Channels. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158099

Chicago Manual of Style (16^th Edition):

Evrard, Rebecca Lynn. “A Validation of the VIIRS Fast Radiative Transfer Model via Brightness Temperature Analysis in Longwave Infrared Channels.” 2016. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/158099.

MLA Handbook (7^th Edition):

Evrard, Rebecca Lynn. “A Validation of the VIIRS Fast Radiative Transfer Model via Brightness Temperature Analysis in Longwave Infrared Channels.” 2016. Web. 08 Mar 2021.

Vancouver:

Evrard RL. A Validation of the VIIRS Fast Radiative Transfer Model via Brightness Temperature Analysis in Longwave Infrared Channels. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/158099.

Council of Science Editors:

Evrard RL. A Validation of the VIIRS Fast Radiative Transfer Model via Brightness Temperature Analysis in Longwave Infrared Channels. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158099

Texas A&M University

5. Yi, Bingqi. Radiative Effects of Dust Aerosols, Natural Cirrus Clouds and Contrails: Broadband Optical Properties and Sensitivity Studies.

Degree: PhD, Atmospheric Sciences, 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151136

► This dissertation aims to study the broadband optical properties and radiative effects of dust aerosols and ice clouds. It covers three main topics: the uncertainty… (more)

▼ This dissertation aims to study the broadband optical properties and radiative effects of dust aerosols and ice clouds. It covers three main topics: the uncertainty of dust optical properties and radiative effects from the dust particle shape and refractive index, the influence of ice particle surface roughening on the global cloud radiative effect, and the simulations of the global contrail radiative forcing. In the first part of this dissertation, the effects of dust non-spherical shape on radiative transfer simulations are investigated. We utilize a spectral database of the single-scattering properties of tri-axial ellipsoidal dust-like aerosols and determined a suitable dust shape model. The radiance and flux differences between the spherical and ellipsoidal models are quantified, and the non-spherical effect on the net flux and heating rate is obtained over the solar spectrum. The results indicate the particle shape effect is related to the dust optical depth and surface albedo. Under certain conditions, the dust particle shape effect contributes to 30% of the net flux at the top of the atmosphere. The second part discusses how the ice surface roughening can exert influence on the global cloud radiative effect. A new broadband parameterization for ice cloud bulk scattering properties is developed using severely roughened ice particles. The effect of ice particle surface roughness is derived through simulations with the Fu-Liou and RRTMG radiative transfer codes and the Community Atmospheric Model. The global averaged net cloud radiative effect due to surface roughness is around 1.46 Wm-2. Non-negligible increase in longwave cloud radiative effect is also found. The third part is about the simulation of global contrail radiative forcing and its sensitivity studies using both offline and online modeling frameworks. Global contrail distributions from the literature and Contrail Cirrus Prediction Tool are used. The 2006 global annual averaged contrail net radiative forcing from the offline model is estimated to be 11.3 mW m^(-2), with the regional contrail radiative forcing being more than ten times stronger. Sensitivity tests show that contrail effective size, contrail layer height, the model cloud overlap assumption, and contrail optical properties are among the most important factors. Advisors/Committee Members: Yang, Ping (advisor), Bowman, Kenneth P. (advisor), North, Gerald R. (committee member), Liang, Faming (committee member).

Subjects/Keywords: Aerosol and cloud radiative effects; Natural cirrus clouds; Contrails; Broadband optical properties; Parameterization; Dust aerosols

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yi, B. (2013). Radiative Effects of Dust Aerosols, Natural Cirrus Clouds and Contrails: Broadband Optical Properties and Sensitivity Studies. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151136

Chicago Manual of Style (16^th Edition):

Yi, Bingqi. “Radiative Effects of Dust Aerosols, Natural Cirrus Clouds and Contrails: Broadband Optical Properties and Sensitivity Studies.” 2013. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/151136.

MLA Handbook (7^th Edition):

Yi, Bingqi. “Radiative Effects of Dust Aerosols, Natural Cirrus Clouds and Contrails: Broadband Optical Properties and Sensitivity Studies.” 2013. Web. 08 Mar 2021.

Vancouver:

Yi B. Radiative Effects of Dust Aerosols, Natural Cirrus Clouds and Contrails: Broadband Optical Properties and Sensitivity Studies. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/151136.

Council of Science Editors:

Yi B. Radiative Effects of Dust Aerosols, Natural Cirrus Clouds and Contrails: Broadband Optical Properties and Sensitivity Studies. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151136

Texas A&M University

6. Wang, Chenxi. Investigation of Thin Cirrus Cloud Optical and Microphysical Properties on the Basis of Satellite Observations and Fast Radiative Transfer Models.

Degree: PhD, Atmospheric Sciences, 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151213

► This dissertation focuses on the global investigation of optically thin cirrus cloud optical thickness (tau) and microphysical properties, such as, effective particle size (D_(eff)) and… (more)

▼ This dissertation focuses on the global investigation of optically thin cirrus cloud optical thickness (tau) and microphysical properties, such as, effective particle size (D_(eff)) and ice crystal habits (shapes), based on the global satellite observations and fast radiative transfer models (RTMs). In the first part, we develop two computationally efficient RTMs simulating satellite observations under cloudy-sky conditions in the visible/shortwave infrared (VIS/SWIR) and thermal inferred (IR) spectral regions, respectively. To mitigate the computational burden associated with absorption, thermal emission and multiple scattering, we generate pre-computed lookup tables (LUTs) using two rigorous models, i.e., the line-by-line radiative transfer model (LBLRTM) and the discrete ordinates radiative transfer model (DISORT). The second part introduces two methods (i.e., VIS/SWIR- and IR-based methods) to retrieve tau and D_(eff) from satellite observations in corresponding spectral regions of the two RTMs. We discuss the advantages and weakness of the two methods by estimating the impacts from different error sources on the retrievals through sensitivity studies. Finally, we develop a new method to infer the scattering phase functions of optically thin cirrus clouds in a water vapor absorption channel (1.38-µm). We estimate the ice crystal habits and surface structures by comparing the inferred scattering phase functions and numerically simulated phase functions calculated using idealized habits. We find two critical features of the two retrieval methods: (1) the IR-based method is more sensitive to optically thin cirrus cloud, and (2) the VIS/SWIR-based method is more sensitive to the pre-assumed ice cloud microphysical parameterization schemes. We derive the optically thin cirrus cloud phase functions based on the two methods. We find that small column-like particles (e.g., solid columns and columnaggregates) and droxtals with rough surfaces are likely to reside in optically thin cirrus clouds. Advisors/Committee Members: Yang, Ping (advisor), Kattawar, George (committee member), Nasiri, Shaima (committee member), North, Gerald (committee member).

Subjects/Keywords: Radiative transfer model; Cloud retrieval; Cloud optical and microphysical properties; Optically thin cirrus cloud; Cloud phase function

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wang, C. (2013). Investigation of Thin Cirrus Cloud Optical and Microphysical Properties on the Basis of Satellite Observations and Fast Radiative Transfer Models. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151213

Chicago Manual of Style (16^th Edition):

Wang, Chenxi. “Investigation of Thin Cirrus Cloud Optical and Microphysical Properties on the Basis of Satellite Observations and Fast Radiative Transfer Models.” 2013. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/151213.

MLA Handbook (7^th Edition):

Wang, Chenxi. “Investigation of Thin Cirrus Cloud Optical and Microphysical Properties on the Basis of Satellite Observations and Fast Radiative Transfer Models.” 2013. Web. 08 Mar 2021.

Vancouver:

Wang C. Investigation of Thin Cirrus Cloud Optical and Microphysical Properties on the Basis of Satellite Observations and Fast Radiative Transfer Models. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/151213.

Council of Science Editors:

Wang C. Investigation of Thin Cirrus Cloud Optical and Microphysical Properties on the Basis of Satellite Observations and Fast Radiative Transfer Models. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151213

Texas A&M University

7. Podowitz, Derek Ian. Comparison between Pseudo-Spectral Time Domain and Discrete Dipole Approximation Simulations for Single-scattering Properties of Particles.

Degree: MS, Atmospheric Sciences, 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151327

► The pseudo-spectral time domain (PSTD) and discrete dipole approximation (DDA) are two of the most popular methods to model the single-scattering properties of ice crystals… (more)

▼ The pseudo-spectral time domain (PSTD) and discrete dipole approximation (DDA) are two of the most popular methods to model the single-scattering properties of ice crystals and aerosols. Both methods solve for Maxwell’s equations. The PSTD method uses a Fourier pseudo-spectral method and a finite-difference method to compute the spatial and temporal derivatives of electromagnetic fields. The DDA method uses an electromagnetic integral equation in the frequency domain to calculate the single-scattering properties. We used a spherical model for this study because the analytical solution was given by the Lorenz-Mie theory. Previous studies have found that at refractive indices between 1.2 and 1.5, PSTD computed the single-scattering properties of spherical particles faster for large size parameters, while DDA was more computationally efficient at small size parameters; however, these previous studies did not consider absorptive cases. The purpose of this study was to expand the range of refractive indices to include absorptive cases and to determine which method was more efficient for computing the single-scattering properties of atmospheric particles within set criteria. The PSTD and DDA methods were systematically assessed in this study for 31 different realistic complex refractive indices. Similar to the previous studies, it was found that PSTD was more efficient than DDA for particles with large size parameters. The results in this study were consistent with the previous studies for non-absorptive to moderately absorptive particles. However, for strongly absorptive cases, DDA was more efficient than PSTD at all size parameters for the absorptive particles. It was also determined that the efficiencies of the two methods were dependent on both the real and imaginary parts of the complex refractive index. The significance of this study was to improve our understanding of the capabilities of the PSTD and DDA methods for computing single-scattering properties. Advisors/Committee Members: Yang, Ping (advisor), Kattawar, George (committee member), Panetta, R. Lee (committee member), North, Gerald (committee member).

Subjects/Keywords: DDA; PSTD; Lorenz-Mie Theory; refractive index; atmospheric particles; light scattering; phase matrix

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Podowitz, D. I. (2013). Comparison between Pseudo-Spectral Time Domain and Discrete Dipole Approximation Simulations for Single-scattering Properties of Particles. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151327

Chicago Manual of Style (16^th Edition):

Podowitz, Derek Ian. “Comparison between Pseudo-Spectral Time Domain and Discrete Dipole Approximation Simulations for Single-scattering Properties of Particles.” 2013. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/151327.

MLA Handbook (7^th Edition):

Podowitz, Derek Ian. “Comparison between Pseudo-Spectral Time Domain and Discrete Dipole Approximation Simulations for Single-scattering Properties of Particles.” 2013. Web. 08 Mar 2021.

Vancouver:

Podowitz DI. Comparison between Pseudo-Spectral Time Domain and Discrete Dipole Approximation Simulations for Single-scattering Properties of Particles. [Internet] [Masters thesis]. Texas A&M University; 2013. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/151327.

Council of Science Editors:

Podowitz DI. Comparison between Pseudo-Spectral Time Domain and Discrete Dipole Approximation Simulations for Single-scattering Properties of Particles. [Masters Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151327

Texas A&M University

8. Xie, Yu. Study of Ice Cloud Properties from Synergetic Use of Satellite Observations and Modeling Capabilities.

Degree: PhD, Atmospheric Sciences, 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8801

► The dissertation first investigates the single-scattering properties of inhomogeneous ice crystals containing air bubbles. Specifically, a combination of the ray-tracing technique and the Monte Carlo… (more)

▼ The dissertation first investigates the single-scattering properties of inhomogeneous ice crystals containing air bubbles. Specifically, a combination of the ray-tracing technique and the Monte Carlo method is used to simulate the scattering of light by randomly oriented large hexagonal ice crystals containing spherical or spheroidal air bubbles. The effect of the air bubbles within ice crystals is to smooth the phase functions, diminish the 22° and 46° halo peaks, and reduce the backscatter in comparison with the case of bubble-free ice crystals. Cloud reflectance look-up tables were generated at the wavelengths of 0.65 μm and 2.13 μm to examine the impact of accounting for air bubbles in ice crystal morphology on the retrieval of ice cloud optical thickness and effective particle size. To investigate the effect of the representation of aggregates on electromagnetic scattering calculations, an algorithm is developed to efficiently specify the geometries of aggregates and to compute some of their geometric parameters such as the projected area. Based on in situ observations, aggregates are defined as clusters of hexagonal plates with a chain-like overall shape. An aggregate model is developed with 10 ensemble members, each consisting of between 4-12 hexagonal plates. The scattering properties of an individual aggregate ice particle are computed using the discrete dipole approximation or an Improved Geometric Optics Method, depending upon the size parameter. The aggregate model provides an accurate and computationally efficient way to represent all aggregates occurring within ice clouds. We developed an algorithm to determine an appropriate ice cloud model for application to satellite-based retrieval of ice cloud properties. Collocated Moderate Resolution Imaging Spectroradiometer and Multi-angle Imaging SpectroRadiometer (MISR) data are used to retrieve the optical thicknesses of ice clouds as a function of scattering angle in the nine MISR viewing directions. The difference between cloud optical thickness and its averaged value over the nine viewing angles can be used to validate the ice cloud models. Using the data obtained on 2 July 2009, an appropriate ice cloud model is determined. With the presence of all the uncertainties in the current operational satellite-based retrievals of ice cloud properties, this ice cloud model has excellent performance in terms of consistency in cloud property retrievals with the nine MISR viewing angles. Advisors/Committee Members: Yang, Ping (advisor), Kattawar, George (committee member), Nasiri, Shaima (committee member), North, Gerald (committee member).

Subjects/Keywords: Cirrus cloud; Ice crystal; Light scattering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Xie, Y. (2011). Study of Ice Cloud Properties from Synergetic Use of Satellite Observations and Modeling Capabilities. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8801

Chicago Manual of Style (16^th Edition):

Xie, Yu. “Study of Ice Cloud Properties from Synergetic Use of Satellite Observations and Modeling Capabilities.” 2011. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8801.

MLA Handbook (7^th Edition):

Xie, Yu. “Study of Ice Cloud Properties from Synergetic Use of Satellite Observations and Modeling Capabilities.” 2011. Web. 08 Mar 2021.

Vancouver:

Xie Y. Study of Ice Cloud Properties from Synergetic Use of Satellite Observations and Modeling Capabilities. [Internet] [Doctoral dissertation]. Texas A&M University; 2011. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8801.

Council of Science Editors:

Xie Y. Study of Ice Cloud Properties from Synergetic Use of Satellite Observations and Modeling Capabilities. [Doctoral Dissertation]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8801

Texas A&M University

9. Chen, Dayou. Light Scattering in the Ocean and in Biological Tissues.

Degree: PhD, Physics, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/159088

► In the first part of this dissertation, we simulate the underwater polarized light field. A three-dimensional backward Monte Carlo code is developed to simulate light… (more)

▼ In the first part of this dissertation, we simulate the underwater polarized light field. A three-dimensional backward Monte Carlo code is developed to simulate light scattering for an atmosphere-ocean system. In this model, we send photons from the detector and propagate them toward the source, which allows us to calculate the effective Mueller Matrix of the medium. The 3D vector radiation field can be calculated with dynamic interface, complex boundary conditions, as well as the complex ocean objects included in the system. The polarizer imaging is first modeled when polarizers are stuck on the surface of a piece of mirror and put in the open ocean to study the light polarizations in the ocean water. The effects of observation distance and viewing angle on the radiance, the degree of polarization, as well as the angle of polarization are studied systematically. Then we use a simple tank model, where several spheres of different sizes and different scattering properties were placed, to simulate what a marine organism can see under the water. Images based on four different Stokes components are obtained for a variety of underwater circumstances. In the second part, we study the effect of both coherent and incoherent beams on both forward and multiple scattering of particulate media in biological tissues. The phase shift of a single particle in the forward direction is calculated using the anomalous diffraction method; the influence of particle size distributions, particle shapes, and particle orientations on the forward coherent peaks is studied for an ensemble of particles. In particular, we demonstrate the forward coherent scattering, as well as multiple scattering properties in detail for the chromatophore cell in cephalopods and the human blood system. Additionally, Mueller matrix components with partially coherent or even non-coherent incident beams are investigated in order to study the effect of coherence length on the forward coherent scattering and multiple scattering. Advisors/Committee Members: Kattawar, George (advisor), Allen, Roland (committee member), Fry, Edward (committee member), Yang, Ping (committee member).

Subjects/Keywords: polarization; Monte Carlo; coherent forward scattering; multiple scattering; coherence length

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chen, D. (2016). Light Scattering in the Ocean and in Biological Tissues. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/159088

Chicago Manual of Style (16^th Edition):

Chen, Dayou. “Light Scattering in the Ocean and in Biological Tissues.” 2016. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/159088.

MLA Handbook (7^th Edition):

Chen, Dayou. “Light Scattering in the Ocean and in Biological Tissues.” 2016. Web. 08 Mar 2021.

Vancouver:

Chen D. Light Scattering in the Ocean and in Biological Tissues. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/159088.

Council of Science Editors:

Chen D. Light Scattering in the Ocean and in Biological Tissues. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/159088

Texas A&M University

10. Wolfe, Christopher Alan. Using Engineering Cameras On Mars Rovers and Landers to Retrieve Atmospheric Dust Loading.

Degree: MS, Atmospheric Sciences, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/158130

► Dust in the Martian atmosphere influences energy deposition, dynamics, and the viability of solar powered exploration vehicles. The Viking, Pathfinder, Spirit, Opportunity, Phoenix, and Curiosity… (more)

▼ Dust in the Martian atmosphere influences energy deposition, dynamics, and the viability of solar powered exploration vehicles. The Viking, Pathfinder, Spirit, Opportunity, Phoenix, and Curiosity landers and rovers each included the ability to image the Sun with a science camera equipped with a neutral density filter. Direct images of the Sun not only provide the ability to measure extinction by dust and ice in the atmosphere, but also provide a variety of constraints on the Martian dust and water cycles. These observations have been used to characterize dust storms, provide ground truth sites for orbiter-based global measurements of dust loading, and help monitor solar panel performance. In the cost-constrained environment of Mars exploration, future missions may omit such cameras, as the solar-powered InSight mission has. We seek to provide a robust capability of determining atmospheric opacity from sky images taken with cameras that have not been designed for solar imaging, such as the engineering cameras onboard Opportunity. Our investigation focuses primarily on the accuracy of a method that determines optical depth values using a scattering model that implements the ratio of sky radiance measurements at different elevation angles, but the same scattering angle. MER engineering cameras are used to obtain non-solar sky images approximately 90° away from a low horizon Sun. A discrete ordinate radiative transfer algorithm and robust atmospheric scattering model are used in conjunction with the downlinked image files to produce both an image and model radiance profile. Optical depth is derived using a least-squares curving fitting routine within the scattering model that iteratively compares the two radiance profiles. Derived optical depth values are then compared against observed Pancam measurements to assess goodness of fit. Operational use requires the ability to retrieve optical depth on a timescale useful to mission planning, and with an accuracy and precision sufficient to support both mission planning and validation of orbital measurements. This thesis will present a simulation-based assessment of an imaging strategy and its error budget, as well as a validation based on the comparison of direct extinction measurements from archival Navigation camera (Navcam) data. Results from this observational campaign will follow a preliminary validation that was done using synthetic sky images in order to test the robustness of the scattering model. After the observational results are presented, an in-depth error analysis will provide further detail pertaining to the fidelity of the derived measurements. Finally, this thesis will conclude with a brief discussion regarding the implications of this study and what the future has in store for ground-based optical depth retrieval. Advisors/Committee Members: Lemmon, Mark T. (advisor), Yang, Ping (committee member), Ewing, Ryan C. (committee member).

Subjects/Keywords: Mars; Optical Depth; Engineering Cameras

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wolfe, C. A. (2016). Using Engineering Cameras On Mars Rovers and Landers to Retrieve Atmospheric Dust Loading. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158130

Chicago Manual of Style (16^th Edition):

Wolfe, Christopher Alan. “Using Engineering Cameras On Mars Rovers and Landers to Retrieve Atmospheric Dust Loading.” 2016. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/158130.

MLA Handbook (7^th Edition):

Wolfe, Christopher Alan. “Using Engineering Cameras On Mars Rovers and Landers to Retrieve Atmospheric Dust Loading.” 2016. Web. 08 Mar 2021.

Vancouver:

Wolfe CA. Using Engineering Cameras On Mars Rovers and Landers to Retrieve Atmospheric Dust Loading. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/158130.

Council of Science Editors:

Wolfe CA. Using Engineering Cameras On Mars Rovers and Landers to Retrieve Atmospheric Dust Loading. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158130

Texas A&M University

11. Zhang, Jianing. Scattering and Radiation Computation with Spectral Methods.

Degree: PhD, Atmospheric Sciences, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/158040

► Surface roughness, a fundamental characteristic of atmospheric ice particles, is essential for defining an appropriate particle morphology model to simulate optical properties of atmospheric particles.… (more)

▼ Surface roughness, a fundamental characteristic of atmospheric ice particles, is essential for defining an appropriate particle morphology model to simulate optical properties of atmospheric particles. This dissertation presents a dynamic stochastic parameterization approach based on combining the discrete differential geometry and stochastic partial differential equations to generate particle overall shapes and the degree of surface roughness. The scattering of light by particles modeled as Gaussian spheroids with size parameters up to 300 is simulated with the Invariant Imbedding T-Matrix (II-TM) method to investigate the effect of particle surface roughness on the single-scattering properties, including the phase matrix, single-scattering albedo, and extinction efficiency. It is shown that high-frequency oscillations of the phase matrix with respect to scattering angle are gradually suppressed as the degree of roughness increases. The dissertation presents a more thorough method of roughened particles in light scattering computation than various ad hoc methods reported in the literature. We discuss how surface roughness influences the Muller matrix patterns of ice particles. These results also enable better understanding of microphysics on ice surface and more accurate parameterization of atmospheric ice particles. We show that surface irregularity changes the phase matrix elements dramatically. An analysis of optical modeling of mineral dust aerosols as Gaussian spheroids is presented. The modeling results are compared with experimental measurements of feldspar to validate the applicability of roughened model particles. The Gaussian spheroids shows better data fitting than smooth spheroids. Furthermore, we analyze population density and shape distributions of Gaussian spheroid for different mineral dust species. In addition to the scattering study, we propose a new Monte Carlo method for radiative transfer based on the Metropolis algorithm. Advisors/Committee Members: Yang, Ping (advisor), Panetta, Lee (advisor), North, Gerald R (committee member), Bhattacharya, Anirban (committee member).

Subjects/Keywords: Spectral method; T-Matrix; Surface roughness; Random field; Metropolis algorithm

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, J. (2016). Scattering and Radiation Computation with Spectral Methods. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158040

Chicago Manual of Style (16^th Edition):

Zhang, Jianing. “Scattering and Radiation Computation with Spectral Methods.” 2016. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/158040.

MLA Handbook (7^th Edition):

Zhang, Jianing. “Scattering and Radiation Computation with Spectral Methods.” 2016. Web. 08 Mar 2021.

Vancouver:

Zhang J. Scattering and Radiation Computation with Spectral Methods. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/158040.

Council of Science Editors:

Zhang J. Scattering and Radiation Computation with Spectral Methods. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158040

Texas A&M University

12. Glen, Andrew. The Development of Measurement Techniques to Identify and Characterize Dusts and Ice Nuclei in the Atmosphere.

Degree: PhD, Atmospheric Sciences, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/152508

► Mineral dusts and ice crystals directly influence the Earth's radiative budget through radiative scattering and absorption. The interaction of spherical particles on the radiative budget… (more)

▼ Mineral dusts and ice crystals directly influence the Earth's radiative budget through radiative scattering and absorption. The interaction of spherical particles on the radiative budget are well known, however mineral dusts and ice crystals are generally non-spherical leading to large uncertainties in the radiative impacts of these particles. In addition, atmospheric dust has the ability to act as an Ice Nuclei (IN) aiding in the formation of ice crystals in the atmosphere through four well known nucleation mechanisms. The work presented here discusses new instrumentation and methods to measure and identify both the optical scattering properties and ice nucleation properties of atmospherically relevant dusts. The Texas A&M University Continuous Flow Diffusion Chamber (CFDC) was constructed and characterized in the laboratory using a known effective IN, silver iodide. This instrument was then deployed in the Arctic as part of the Indirect Semi-Direct Aerosol Campaign (ISDAC) where it measured the concentration of potential IN under atmospheric conditions. The results of which, showed the Arctic has higher particle concentrations during the spring compared to data collected in the fall during other field projects. In addition, extreme nucleation events were observed with average IN concentrations as high as 100 L^(-1). The optical scattering properties of atmospherically relevant dusts were measured using a prototype instrument, the Cloud Aerosol Spectrometer with Polarization (CASPOL) under laboratory conditions. The data collected using this instrument allowed the classification of 13 atmospherically relevant dusts into 3 distinct groups based on the optical scattering properties. This instrument was then upgraded by the manufacturer and used to measure the optical scattering properties of both atmospherically relevant dusts and ice crystals generated using the CFDC with the previously examined dusts as potential IN. The results show the dusts can still be categorized into 3 distinct groups and can be differentiated from generated ice crystals. These results provide methodologies for differentiating atmospheric dust from ice crystals in the atmosphere using remote sensing instrumentation. Advisors/Committee Members: Brooks, Sarah D (advisor), Collins, Don (committee member), Yang, Ping (committee member), Klein, Andrew (committee member).

Subjects/Keywords: Ice Nucleation; Optical Scattering Properties; Dust; Instrumentation

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Glen, A. (2014). The Development of Measurement Techniques to Identify and Characterize Dusts and Ice Nuclei in the Atmosphere. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152508

Chicago Manual of Style (16^th Edition):

Glen, Andrew. “The Development of Measurement Techniques to Identify and Characterize Dusts and Ice Nuclei in the Atmosphere.” 2014. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/152508.

MLA Handbook (7^th Edition):

Glen, Andrew. “The Development of Measurement Techniques to Identify and Characterize Dusts and Ice Nuclei in the Atmosphere.” 2014. Web. 08 Mar 2021.

Vancouver:

Glen A. The Development of Measurement Techniques to Identify and Characterize Dusts and Ice Nuclei in the Atmosphere. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/152508.

Council of Science Editors:

Glen A. The Development of Measurement Techniques to Identify and Characterize Dusts and Ice Nuclei in the Atmosphere. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152508

Texas A&M University

13. Zhang, Jianing. An Investigation of Light Scattering by Irregular Ice Crystals via PSTD.

Degree: MS, Atmospheric Sciences, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153636

► We implement the Pseudo-Spectral Time Domain(PSTD) algorithm with Convolutional Perfect Matched Layer(CPML). Comparisons were conducted to test its performance with Mie's method. Results illustrate its… (more)

Subjects/Keywords: PSTD; CPML; Surface roughness; Light scattering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, J. (2014). An Investigation of Light Scattering by Irregular Ice Crystals via PSTD. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153636

Chicago Manual of Style (16^th Edition):

Zhang, Jianing. “An Investigation of Light Scattering by Irregular Ice Crystals via PSTD.” 2014. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/153636.

MLA Handbook (7^th Edition):

Zhang, Jianing. “An Investigation of Light Scattering by Irregular Ice Crystals via PSTD.” 2014. Web. 08 Mar 2021.

Vancouver:

Zhang J. An Investigation of Light Scattering by Irregular Ice Crystals via PSTD. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/153636.

Council of Science Editors:

Zhang J. An Investigation of Light Scattering by Irregular Ice Crystals via PSTD. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153636

Texas A&M University

14. Pitts, Katherine L. Vertical Distribution of Cloud Liquid Water and Ice: A Comparison of MODIS Satellite Observations and the GISS Global Climate Model.

Degree: MS, Atmospheric Sciences, 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/155013

► Clouds continue to be a large source of uncertainty within global climate models. While satellites provide the only global datasets for comparison with these models,… (more)

▼ Clouds continue to be a large source of uncertainty within global climate models. While satellites provide the only global datasets for comparison with these models, satellite retrievals provide inferences of cloud properties, rather than direct measurements. Therefore, comparisons between climate model simulations and satellite retrievals require careful construction of globally-gridded and time-averaged (Level 3) satellite datasets. For some types of comparisons, existing Level 3 datasets may not be sufficient, necessitating the generation of gridded datasets directly from Level 2 products. The current study uses a filtering and gridding algorithm to create a customized globally-gridded (i.e., Level 3) dataset based on Aqua MODIS Level 2 cloud top pressure and cloud optical property retrievals. With the recent release of MODIS Collection 6, we utilize this algorithm to examine the differences between cloud parameters in the MODIS Collection 5 and Collection 6 datasets, and then compare these satellite measurements to the GISS-E2-H model-simulated cloud parameters that were provided for the Coupled Model Intercomparison Project - Phase 5 (CMIP5). This comparison study focuses on the vertical distribution of cloud liquid water and ice, especially in the mid-troposphere where mixed-phase clouds are most likely to occur. Results show that the cloud retrieval algorithm improvements with MODIS Collection 6 lead to an overall decrease in uncertainty in cloud water path retrievals, as well as a change in the vertical distribution of clouds (high clouds higher, low clouds lower) and the resulting vertical distribution of cloud water path (increased mid-level cloud water path). When MODIS Collection 6 data are compared with GISS-E2-H climate model simulations, it is clear that the model greatly overestimates ice water path within a double ITCZ (intertropical convergence zone) in the high cloud height regime, but underestimates ice water path in higher latitudes. The model also overestimates low level liquid water path over land, especially over mountainous regions. The filtering and gridding algorithm used in this study is a convenient tool for building custom gridded datasets to address research questions that the official Level 3 datasets were not designed for. Advisors/Committee Members: Nasiri, Shaima (advisor), Bowman, Kenneth (committee member), Yang, Ping (committee member), Klein, Andrew (committee member).

Subjects/Keywords: MODIS; MODIS Collection 6; MODIS C6; Level 3; GISS; Global Climate Models; GCM; GCMs; Cloud water path; Liquid water path; Ice water path; Cloud; Clouds; cloud height; cloud vertical distribution; space-time gridding; gridding

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pitts, K. L. (2015). Vertical Distribution of Cloud Liquid Water and Ice: A Comparison of MODIS Satellite Observations and the GISS Global Climate Model. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155013

Chicago Manual of Style (16^th Edition):

Pitts, Katherine L. “Vertical Distribution of Cloud Liquid Water and Ice: A Comparison of MODIS Satellite Observations and the GISS Global Climate Model.” 2015. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/155013.

MLA Handbook (7^th Edition):

Pitts, Katherine L. “Vertical Distribution of Cloud Liquid Water and Ice: A Comparison of MODIS Satellite Observations and the GISS Global Climate Model.” 2015. Web. 08 Mar 2021.

Vancouver:

Pitts KL. Vertical Distribution of Cloud Liquid Water and Ice: A Comparison of MODIS Satellite Observations and the GISS Global Climate Model. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/155013.

Council of Science Editors:

Pitts KL. Vertical Distribution of Cloud Liquid Water and Ice: A Comparison of MODIS Satellite Observations and the GISS Global Climate Model. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155013

Texas A&M University

15. Coy Jr., James Joseph. Evaluating the Benefits of Using Longwave Infrared and Millimeter/Sub-millimeter Bands to Explore Ice Cloud Characteristics Through Polarized Vector Radiative Transfer Simulations.

Degree: MS, Atmospheric Sciences, 2019, Texas A&M University

URL: http://hdl.handle.net/1969.1/186936

► A comprehensive study on evaluating the usefulness of relatively high frequency millimeter/sub-millimeter (mm/sub-mm) bands (greater than 150 GHz) and longwave infrared (LWIR) atmospheric window bands… (more)

▼ A comprehensive study on evaluating the usefulness of relatively high frequency millimeter/sub-millimeter (mm/sub-mm) bands (greater than 150 GHz) and longwave infrared (LWIR) atmospheric window bands to infer ice cloud properties will be conducted for this thesis. A sizable amount of mm/sub-mm bands have been considered from radiometric and polarimetric studies to be useful for observing ice clouds with lower mm/sub-mm wavelengths (higher frequencies) being able to observe even optically thin cirrus. The LWIR atmospheric window has been thoroughly investigated for their feasibility to also observe ice clouds, especially optically thin cirrus. However, there have not been many studies conducted using several of these relatively high frequency bands or polarimetric LWIR observations to infer ice cloud properties. There have also not been many studies using simulated ice clouds composed of the latest ice particle habit mixtures and single-scattering properties. The single-scattering property databases have considered dependencies such as surface roughness and ambient temperature. This thesis will be focusing on performing simulations on ice clouds using the wavelengths of 440.87 μm (680 GHz), 707.06 um (424 GHz), 922.44 um (325 GHz), 1362.69 um (220 GHz), and 1638.21 um (183 GHz) for the mm/sub-mm regime and 8.6 um, 10.6 um, and 12 um wavelengths of the IR regime. The Atmospheric Radiative Transfer Model (ARTS) will be used to conduct the simulations for 1D atmospheres corresponding to the tropical region. The ice cloud simulations were performed for combinations of ice water path (IWP) and effective diameter (Dvevfvf). IWP and Dvevfvf look-up tables (LUT) were created in order to evaluate the feasibility of retrieving these values. These LUTs were then used to retrieve IWP and Dvevfvf for the 1D vertically heterogeneous ice cloud scenarios which will be using 3D ice clouds produced by Cloudgen – a stochastic cloud generator. The brightness temperature (Tvb) parameters that were used to infer the cloud properties are the split-window technique (BTD), brightness temperature depression relative to clear-sky (Tvb), and the polarization difference (PD). Advisors/Committee Members: Yang, Ping (advisor), Saravanan, Ramalingam (advisor), Bowman, Kenneth (committee member), Filippi, Anthony (committee member).

Subjects/Keywords: Ice Clouds; Radiative Transfer; Radiative Transfer Simulation; Infrared Wavelengths; Microwave (mm/sub-mm) Wavelengths; Polarization; Ice Water Path; Effective Diameter; Retrievals

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Coy Jr., J. J. (2019). Evaluating the Benefits of Using Longwave Infrared and Millimeter/Sub-millimeter Bands to Explore Ice Cloud Characteristics Through Polarized Vector Radiative Transfer Simulations. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/186936

Chicago Manual of Style (16^th Edition):

Coy Jr., James Joseph. “Evaluating the Benefits of Using Longwave Infrared and Millimeter/Sub-millimeter Bands to Explore Ice Cloud Characteristics Through Polarized Vector Radiative Transfer Simulations.” 2019. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/186936.

MLA Handbook (7^th Edition):

Coy Jr., James Joseph. “Evaluating the Benefits of Using Longwave Infrared and Millimeter/Sub-millimeter Bands to Explore Ice Cloud Characteristics Through Polarized Vector Radiative Transfer Simulations.” 2019. Web. 08 Mar 2021.

Vancouver:

Coy Jr. JJ. Evaluating the Benefits of Using Longwave Infrared and Millimeter/Sub-millimeter Bands to Explore Ice Cloud Characteristics Through Polarized Vector Radiative Transfer Simulations. [Internet] [Masters thesis]. Texas A&M University; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/186936.

Council of Science Editors:

Coy Jr. JJ. Evaluating the Benefits of Using Longwave Infrared and Millimeter/Sub-millimeter Bands to Explore Ice Cloud Characteristics Through Polarized Vector Radiative Transfer Simulations. [Masters Thesis]. Texas A&M University; 2019. Available from: http://hdl.handle.net/1969.1/186936

Texas A&M University

16. Kuo, Chia-Pang. IMPACTS OF NEGLECTING LONGWAVE SCATTERING AND THE METHODS OF REDUCING THESE UNCERTAINTIES IN MODEL SIMULATIONS CONTAINING CLOUDS.

Degree: PhD, Atmospheric Sciences, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/173970

► Since clouds are spread widely around the world and heavily influence the Earth’s energy budget, people extensively use general circulation models (GCMs) to investigate the… (more)

▼ Since clouds are spread widely around the world and heavily influence the Earth’s energy budget, people extensively use general circulation models (GCMs) to investigate the effect of clouds on the future climate. Since in the longwave spectrum, absorption leads the radiative transfer processes, to reduce computing time, radiative schemes in most GCMs only take absorption properties of clouds into account. This study investigates the issues of neglecting longwave scattering induced by clouds using satellite observations in 2010. Global simulations show that excluding longwave scattering overestimates upward flux at the top-of-atmosphere (TOA) by about 2.63 W/m² , which is about 10% of the TOA longwave (LW) cloud radiative effect, and underestimates downward flux at the surface by about 1.15 W/m² , corresponding to about 5% of the surface LW cloud radiative effect. Longwave scattering cools the atmosphere by about 0.018 K/day at the tropopause and heats about 0.028 K/day at the surface. The magnitude of the cloud radiative effect from neglecting longwave scattering is similar to the clear-sky radiative effect of doubling COv2. Spectral analysis shows that longwave scattering by ice clouds contributes over 40% of simulation biases in the 350- 500 cm^-1 band. For simpler calculations, the optical properties of ice clouds used in the Moderate Resolution Imaging Spectrometer (MODIS) Collection 6 cloud retrieval products are appropriately parameterized as a function of effective particle size. The overall coefficients of determination (R² ) of the corresponding fitting processes are larger than iii 0.9. By using these parameterized highly scattered ice cloud optical properties in an isothermal homogeneous cloud layer, the performance of various radiative transfer models is examined. The results show that 2-/4-stream approximations are relatively more efficient and are relatively more accurate than other approximation methods in comparisons of simulated cloud emissivity. Advisors/Committee Members: Yang, Ping (advisor), Klein, Andrew (committee member), Rapp, Anita (committee member), Bowman, Kenneth P. (committee member).

Subjects/Keywords: Longwave scattering; Radiative transfer

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kuo, C. (2018). IMPACTS OF NEGLECTING LONGWAVE SCATTERING AND THE METHODS OF REDUCING THESE UNCERTAINTIES IN MODEL SIMULATIONS CONTAINING CLOUDS. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173970

Chicago Manual of Style (16^th Edition):

Kuo, Chia-Pang. “IMPACTS OF NEGLECTING LONGWAVE SCATTERING AND THE METHODS OF REDUCING THESE UNCERTAINTIES IN MODEL SIMULATIONS CONTAINING CLOUDS.” 2018. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/173970.

MLA Handbook (7^th Edition):

Kuo, Chia-Pang. “IMPACTS OF NEGLECTING LONGWAVE SCATTERING AND THE METHODS OF REDUCING THESE UNCERTAINTIES IN MODEL SIMULATIONS CONTAINING CLOUDS.” 2018. Web. 08 Mar 2021.

Vancouver:

Kuo C. IMPACTS OF NEGLECTING LONGWAVE SCATTERING AND THE METHODS OF REDUCING THESE UNCERTAINTIES IN MODEL SIMULATIONS CONTAINING CLOUDS. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/173970.

Council of Science Editors:

Kuo C. IMPACTS OF NEGLECTING LONGWAVE SCATTERING AND THE METHODS OF REDUCING THESE UNCERTAINTIES IN MODEL SIMULATIONS CONTAINING CLOUDS. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173970

Texas A&M University

17. Fang, Guangyang. Optical Properties of Saharan Dust and Asian Dust: Application to Radiative Transfer Simulations.

Degree: MS, Atmospheric Sciences, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11078

► Because the bulk optical properties of dust are largely dependent on their chemical composition, published reports from numerous dust field studies enabled us to compile… (more)

Subjects/Keywords: Dust; Optical properties; radiative transfer simulations.

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fang, G. (2012). Optical Properties of Saharan Dust and Asian Dust: Application to Radiative Transfer Simulations. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11078

Chicago Manual of Style (16^th Edition):

Fang, Guangyang. “Optical Properties of Saharan Dust and Asian Dust: Application to Radiative Transfer Simulations.” 2012. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11078.

MLA Handbook (7^th Edition):

Fang, Guangyang. “Optical Properties of Saharan Dust and Asian Dust: Application to Radiative Transfer Simulations.” 2012. Web. 08 Mar 2021.

Vancouver:

Fang G. Optical Properties of Saharan Dust and Asian Dust: Application to Radiative Transfer Simulations. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11078.

Council of Science Editors:

Fang G. Optical Properties of Saharan Dust and Asian Dust: Application to Radiative Transfer Simulations. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11078

Texas A&M University

18. Shipley, Heath. The Luminous Polycyclic Aromatic Hydrocarbon Emission Features: Applications to High Redshift Galaxies and Active Galactic Nuclei.

Degree: PhD, Physics, 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/155693

► The co-evolution of star-formation and supermassive black hole (SMBH) accretion in galaxies is one of the key problems in galaxy formation theory. Understanding the formation… (more)

▼ The co-evolution of star-formation and supermassive black hole (SMBH) accretion in galaxies is one of the key problems in galaxy formation theory. Understanding the formation of galaxies, and their subsequent evolution, will be coupled to intensive study of the evolution of SMBHs. This thesis focuses on studying diagnostics of star-formation and SMBH accretion to develop tools to study this co-evolution. Chapter 2 consists of using mid-infrared (mid-IR) spectroscopy from the Spitzer Infrared Spectrograph (IRS) to study the nature of star-formation and SMBH accretion. The mid-IR spectra cover wavelengths 5-38µm, spanning the polycyclic aromatic hydrocarbon (PAH) features and important atomic diagnostic lines. We divide our sample into a subsample of galaxies with Spitzer IRAC colors indicative of warm dust heated by an AGN (IRAGN) and those galaxies whose colors indicate star-formation processes (non-IRAGN). In both the IRAGN and star-forming samples, the luminosity in the PAH features correlates strongly with [Ne II]λ12.8µm emission line, from which we conclude that the PAH luminosity directly traces the instantaneous star-formation rate (SFR) in both the IRAGN and star-forming galaxies. There is no measurable difference between the PAH luminosity ratios of L11:3/L7:7 and L6:2/L7:7 for the IRAGN and non-IRAGN, suggesting that AGN do not significantly excite or destroy PAH molecules on galaxy-wide scales. In chapter 3, I calibrate the PAH luminosity as a SFR indicator. We provide a new robust SFR calibration using the luminosity emitted from PAH molecules at 6.2µm, 7.7µm and 11.3µm. The PAH features emit strongly in the mid-IR mitigating dust extinction, containing on average 5 – 10% of the total IR luminosity in galaxies. We use mid-IR spectroscopy from the Spitzer/IRS, and data covering other SFR indicators (Hα emission and rest-frame 24µm continuum emission). The PAH luminosity correlates linearly with the SFR as measured by the Hα luminosity (corrected for attenuation using the mono-chromatic rest-frame 24um emission), with a tight scatter of <0.15 dex. The scatter is comparable to that between SFRs derived from the Paα and dust-corrected Hα emission lines, implying the PAH features may be as accurate a SFR indicator as the Hydrogen recombination lines. Because the PAH features are so bright, our PAH SFR calibration enables an efficient way to measure SFRs in distant galaxies with JWST to SFRs as low as ~10 M⨀ yr^-1 to z <~ 2. We use Spitzer/IRS observations of PAH features in lensed star-forming galaxies at 1 < z < 3 to demonstrate the utility of the PAHs to derive SFRs as accurate as those available from Paα. Chapter 4 is the application of the PAH SFRs for galaxies with AGN to demonstrate the reliability for studies of the co-evolution of star-formation and SMBH accretion. We present a study of the contribution from star-formation in galaxies of varying AGN activity (from pure star-forming galaxies to quasars) as a function of total IR luminosity using a sample of 220 galaxies. We use mid-IR spectroscopy from… Advisors/Committee Members: Papovich, Casey J (advisor), DePoy, Darren (committee member), Dutta, Bashkar (committee member), Yang, Ping (committee member).

Subjects/Keywords: galaxies: active; infrared: galaxies; galaxies: evolution; galaxies: high-redshift

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shipley, H. (2015). The Luminous Polycyclic Aromatic Hydrocarbon Emission Features: Applications to High Redshift Galaxies and Active Galactic Nuclei. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155693

Chicago Manual of Style (16^th Edition):

Shipley, Heath. “The Luminous Polycyclic Aromatic Hydrocarbon Emission Features: Applications to High Redshift Galaxies and Active Galactic Nuclei.” 2015. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/155693.

MLA Handbook (7^th Edition):

Shipley, Heath. “The Luminous Polycyclic Aromatic Hydrocarbon Emission Features: Applications to High Redshift Galaxies and Active Galactic Nuclei.” 2015. Web. 08 Mar 2021.

Vancouver:

Shipley H. The Luminous Polycyclic Aromatic Hydrocarbon Emission Features: Applications to High Redshift Galaxies and Active Galactic Nuclei. [Internet] [Doctoral dissertation]. Texas A&M University; 2015. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/155693.

Council of Science Editors:

Shipley H. The Luminous Polycyclic Aromatic Hydrocarbon Emission Features: Applications to High Redshift Galaxies and Active Galactic Nuclei. [Doctoral Dissertation]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155693

Texas A&M University

19. Yu, Wandi. Model Simulation of Convectively Lofted Ice Contribution to Stratospheric Water Vapor.

Degree: MS, Atmospheric Sciences, 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/173082

► Changes in the amount of stratospheric water vapor can affect both the chemistry and climate in the stratosphere and troposphere. Convectively lofted ice near and… (more)

Subjects/Keywords: Convectively lofted ice; stratospheric water vapor

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yu, W. (2017). Model Simulation of Convectively Lofted Ice Contribution to Stratospheric Water Vapor. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173082

Chicago Manual of Style (16^th Edition):

Yu, Wandi. “Model Simulation of Convectively Lofted Ice Contribution to Stratospheric Water Vapor.” 2017. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/173082.

MLA Handbook (7^th Edition):

Yu, Wandi. “Model Simulation of Convectively Lofted Ice Contribution to Stratospheric Water Vapor.” 2017. Web. 08 Mar 2021.

Vancouver:

Yu W. Model Simulation of Convectively Lofted Ice Contribution to Stratospheric Water Vapor. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/173082.

Council of Science Editors:

Yu W. Model Simulation of Convectively Lofted Ice Contribution to Stratospheric Water Vapor. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/173082

Texas A&M University

20. Liu, Chao. Numerical Investigation of Light Scattering by Atmospheric Particles.

Degree: PhD, Atmospheric Sciences, 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151138

► Atmospheric particles, i.e. ice crystals, dust particles, and black carbon, show significant complexities like irregular geometries, inhomogeneity, small-scale surface structures, and play a significant role… (more)

▼ Atmospheric particles, i.e. ice crystals, dust particles, and black carbon, show significant complexities like irregular geometries, inhomogeneity, small-scale surface structures, and play a significant role in the atmosphere by scattering and absorbing the incident solar radiation and terrestrial thermal emission. Knowledge of aerosol scattering properties is a fundamental but challenging aspect of radiative transfer studies and remote sensing applications. This dissertation tries to improve our understanding on the scattering properties of atmospheric particles by investigating both the scattering algorithms and the representation of the realistic particles. One part of this dissertation discusses in details the pseudo-spectral time domain algorithm (PSTD) for calculating scattering properties, its advantages and the elimination of the Gibbs phenomenon. The applicability of the parallelized PSTD implementation is investigated for both spherical and nonspherical particles over a wide range of sizes and refractive indices, and the PSTD is applied for spherical particles with size parameters up to 200, and randomly oriented non-spherical ones with size parameters up to 100. The relative strengths of the PSTD are also shown by a systematic comparison with the discrete dipole approximation (DDA). The PSTD outperforms the DDA for particles with refractive indices larger than 1.4, and ones with smaller refractive indices by large sizes (e.g. size parameters larger than 60 for a refractive index of 1.2). The results suggest significant potential of the PSTD for the numerical investigation of the light scattering and corresponding atmospheric applications. The other part of this dissertation investigates the effects of particle complexities on the light scattering properties of the atmospheric particles, and three aspects corresponding to the irregular geometry, inhomogeneity and surface roughness are studied. To cover the entire particle size range from the Rayleigh to the geometric- optics regimes, the PSTD (for relatively small particles) is combined with the im- proved geometric-optics method (IGOM) that is only applicable for large particles. The Koch-fractal geometry is introduced to model the light scattering properties of aerosol, and performs an excellent job of reproducing the experimental measurements of various mineral dust particles. For the inhomogeneous particles, the applicability of the effective medium approximations (EMA) is tested, and the EMA can be used to approximate the scattering properties of inhomogeneous particles only when the particles are uniformly internal mixtures. Furthermore, an irregular rough model is developed to study the effects of the small-scale surface roughness on the light scattering properties. In conclusion, the dissertation finds that the complexities of atmospheric particles have to be fully considered to obtain their scattering properties accurately. Advisors/Committee Members: Panetta, Richard Lee (advisor), Yang, Ping (advisor), Brooks, Sarah D. (committee member), Guermond, Jean-Luc (committee member).

Subjects/Keywords: Light Scattering; PSTD; Fractal Particles; Inhomogeneity; Surface Roughness

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liu, C. (2013). Numerical Investigation of Light Scattering by Atmospheric Particles. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151138

Chicago Manual of Style (16^th Edition):

Liu, Chao. “Numerical Investigation of Light Scattering by Atmospheric Particles.” 2013. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/151138.

MLA Handbook (7^th Edition):

Liu, Chao. “Numerical Investigation of Light Scattering by Atmospheric Particles.” 2013. Web. 08 Mar 2021.

Vancouver:

Liu C. Numerical Investigation of Light Scattering by Atmospheric Particles. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/151138.

Council of Science Editors:

Liu C. Numerical Investigation of Light Scattering by Atmospheric Particles. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151138

Texas A&M University

21. Huang, Xin. Retrieval of Non-Spherical Dust Aerosol Properties from Satellite Observations.

Degree: PhD, Physics, 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151193

► An accurate and generalized global retrieval algorithm from satellite observations is a prerequisite to understand the radiative effect of atmospheric aerosols on the climate system.… (more)

▼ An accurate and generalized global retrieval algorithm from satellite observations is a prerequisite to understand the radiative effect of atmospheric aerosols on the climate system. Current operational aerosol retrieval algorithms are limited by the inversion schemes and suffering from the non-uniqueness problem. In order to solve these issues, a new algorithm is developed for the retrieval of non-spherical dust aerosol over land using multi-angular radiance and polarized measurements of the POLDER (POLarization and Directionality of the Earth’s Reflectances) and wide spectral high-resolution measurements of the MODIS (MODerate resolution Imaging Spectro-radiometer). As the first step to account for the non-sphericity of irregularly shaped dust aerosols in the light scattering problem, the spheroidal model is introduced. To solve the basic electromagnetic wave scattering problem by a single spheroid, we developed an algorithm, by transforming the transcendental infinite-continued-fraction-formeigen equation into a symmetric tri-diagonal linear system, for the calculation of the spheroidal angle function, radial functions of the first and second kind, as well as the corresponding first order derivatives. A database is developed subsequently to calculate the bulk scattering properties of dust aerosols for each channel of the satellite instruments. For the purpose of simulation of satellite observations, a code is developed to solve the VRTE (Vector Radiative Transfer Equation) for the coupled atmosphere-surface system using the adding-doubling technique. An alternative fast algorithm, where all the solid angle integrals are converted to summations on an icosahedral grid, is also proposed to speed-up the code. To make the model applicable to various land and ocean surfaces, a surface BRDF (Bidirectional Reflectance Distribution Function) library is embedded into the code. Considering the complimentary features of the MODIS and the POLDER, the collocated measurements of these two satellites are used in the retrieval process. To reduce the time spent on the simulation of dust aerosol scattering properties, a single-scattering property database of tri-axial ellipsoid is incorporated. In addition, atmospheric molecule correction is considered using the LBLRTM (Line-By-Line Ra- diative Transfer Model). The Levenberg-Marquardt method was employed to retrieve all the interested dust aerosol parameters and surface parameters simultaneously. As an example, dust aerosol properties retrieved over the Sahara Desert are presented. Advisors/Committee Members: Kattawar, George W. (advisor), Yang, Ping (advisor), Allen, Roland E. (committee member), Fry, Edward S. (committee member).

Subjects/Keywords: Light scattering; Radiative transfer; Aerosol retrieval; Spheroidal wave functions; Adding-doubling; Surface BRDF; Fast model; POLDER/PARASOL; Saharan dust

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Huang, X. (2013). Retrieval of Non-Spherical Dust Aerosol Properties from Satellite Observations. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151193

Chicago Manual of Style (16^th Edition):

Huang, Xin. “Retrieval of Non-Spherical Dust Aerosol Properties from Satellite Observations.” 2013. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/151193.

MLA Handbook (7^th Edition):

Huang, Xin. “Retrieval of Non-Spherical Dust Aerosol Properties from Satellite Observations.” 2013. Web. 08 Mar 2021.

Vancouver:

Huang X. Retrieval of Non-Spherical Dust Aerosol Properties from Satellite Observations. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/151193.

Council of Science Editors:

Huang X. Retrieval of Non-Spherical Dust Aerosol Properties from Satellite Observations. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151193

Texas A&M University

22. Cho, Hyoun-Myoung. Studying Clouds and Aerosols with Lidar Depolarization Ratio and Backscatter Relationships.

Degree: PhD, Atmospheric Sciences, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10606

► This dissertation consists of three parts, each devoted to a particular issue of significant importance for CALIPSO lidar observation of depolarization ratio (delta) and backscatter… (more)

▼ This dissertation consists of three parts, each devoted to a particular issue of significant importance for CALIPSO lidar observation of depolarization ratio (delta) and backscatter (gamma?) to improve current understanding of the microphysical properties of clouds and aerosols. The relationships between depolarization ratio and backscatter allow us to retrieve particle thermodynamic phase and shape and/or orientation of aerosols and clouds. The first part is devoted to the investigation of the relationships between lidar backscatter and the corresponding depolarization ratio for different cloud classifications and aerosol types. For each cloud and aerosol types, layer-averaged backscatter and backscattering depolarization ratio from the CALIPSO measurements are discussed. The present results demonstrate the unique capabilities of the CALIPSO lidar instrument for determining cloud phase and aerosols subtypes. In the second part, we evaluate the MODIS IR cloud phase with the CALIPSO cloud products. The three possible misclassifications of MODIS IR cloud phasealgorithm, which are studied by Nasiri and Kahn (2008) with radiative transfer modeling, are tested by comparing between MODIS IR phase and CALIOP observations. The current results support their hypotheses, which is that the MODIS phase algorithm may tend to classify thin cirrus clouds as water clouds or mixed phase clouds or unknown, and classify midlevel and/or mid-temperature clouds as mixed or unknown phase. In the third part, we present a comparison of mineral dust aerosol retrievals from two instruments, MODIS and CALIPSO lidar. And, we implement and evaluate a new mineral dust detection algorithm based on the analysis of thin dust radiative signature. In comparison, three commonly used visible and IR mineral dust detection algorithms, including BTD procedure, D parameter method, and multi-channel image algorithm, are evaluated with CALIPSO aerosol classification. The comparison reveals that those dust detection algorithms are not effective for optically thin dust layers, but for thick dust storm. The new algorithm using discriminant analysis with CALIPSO observation is much better in detecting thin dust layer of optical thickness between 0.1 and 2. Advisors/Committee Members: Yang, Ping (advisor), Nasiri, Shaima L. (advisor), North, Gerald R. (committee member), Kattawar, George W. (committee member).

Subjects/Keywords: lidar; CALIPSO; depolariization ratio

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cho, H. (2012). Studying Clouds and Aerosols with Lidar Depolarization Ratio and Backscatter Relationships. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10606

Chicago Manual of Style (16^th Edition):

Cho, Hyoun-Myoung. “Studying Clouds and Aerosols with Lidar Depolarization Ratio and Backscatter Relationships.” 2012. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10606.

MLA Handbook (7^th Edition):

Cho, Hyoun-Myoung. “Studying Clouds and Aerosols with Lidar Depolarization Ratio and Backscatter Relationships.” 2012. Web. 08 Mar 2021.

Vancouver:

Cho H. Studying Clouds and Aerosols with Lidar Depolarization Ratio and Backscatter Relationships. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10606.

Council of Science Editors:

Cho H. Studying Clouds and Aerosols with Lidar Depolarization Ratio and Backscatter Relationships. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10606

Texas A&M University

23. Li, Yue. Investigation of the Dynamical, Macrophysical and Radiative Properties of High Clouds Combining Satellite Observations and Climate Model Simulations.

Degree: PhD, Atmospheric Sciences, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10453

► This dissertation investigates three topics concerning high clouds: 1) convectively coupled equatorial wave (CCEW) signals derived from cloud top temperature (CTT) and cirrus optical thickness… (more)

▼ This dissertation investigates three topics concerning high clouds: 1) convectively coupled equatorial wave (CCEW) signals derived from cloud top temperature (CTT) and cirrus optical thickness retrieved from satellite observations; 2) investigation of the physical mechanism governing the fixed anvil temperature (FAT) hypothesis and test of FAT hypothesis with CTT measurements; and 3) the intercomparison of cloud fraction and radiative effects between satellite-based observations and reanalysis product and simulations from general circulation models (GCMs). A wealth of information on CCEWs is derived from Aqua/MODIS cloud-top properties. We apply space-time spectral analysis on more than 6 years of CTT and isolate various modes of CCEWs including Kelvin, n = 1 equatorial Rossby, mixed Rossby-gravity, n = 0 eastward inertio-gravity waves, and the Madden-Julian oscillation. The successful application of the same method to cirrus cloud optical thickness confirms robust convective signals at upper troposphere. Consistent with the physical governing mechanism of the FAT hypothesis, the peak clear-sky diabatic subsidence, convergence and cloud fraction are located at roughly the same level (200 hPa), which is fundamentally determined by the rapid decrease of water vapor concentration above this level. The geographical maxima of cloud fraction agree well with that of water vapor, clear-sky cooling rates, diabatic subsidence and convergence at 200 hPa. An analysis of the response of the tropical mean CTT anomaly time series to sea surface temperature indicates that a possible negative relationship is present. In addition, we suggest interpreting the FAT hypothesis, and the more recent proportionately higher anvil temperature (PHAT) hypothesis, by using the temperature at the maximum cloud detrainment level instead of the CTT. Simulations of cloud fraction and radiative properties using two versions of the NCAR CAM models indicate that an overall improvement is observed in CAM5 compared to CAM3. However, an apparent bias in CAM5 shortwave (SW) cloud radiative forcing (CRF) simulation is shown in boreal winter southern mid latitude. This bias is primarily due to the underestimation of fraction-weighted SW CRF related to both high and middle top clouds. Additionally, apparent compensation errors are observed in models. Advisors/Committee Members: Yang, Ping (advisor), North, Gerald R. (advisor), Nasiri, Shaima L. (committee member), Liang, Faming (committee member), Dessler, Andrew (committee member).

Subjects/Keywords: high clouds; climate change

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, Y. (2012). Investigation of the Dynamical, Macrophysical and Radiative Properties of High Clouds Combining Satellite Observations and Climate Model Simulations. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10453

Chicago Manual of Style (16^th Edition):

Li, Yue. “Investigation of the Dynamical, Macrophysical and Radiative Properties of High Clouds Combining Satellite Observations and Climate Model Simulations.” 2012. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10453.

MLA Handbook (7^th Edition):

Li, Yue. “Investigation of the Dynamical, Macrophysical and Radiative Properties of High Clouds Combining Satellite Observations and Climate Model Simulations.” 2012. Web. 08 Mar 2021.

Vancouver:

Li Y. Investigation of the Dynamical, Macrophysical and Radiative Properties of High Clouds Combining Satellite Observations and Climate Model Simulations. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10453.

Council of Science Editors:

Li Y. Investigation of the Dynamical, Macrophysical and Radiative Properties of High Clouds Combining Satellite Observations and Climate Model Simulations. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10453

Texas A&M University

24. Verma, Abhishek. Definitions of Clear-sky Fluxes and Implications.

Degree: MS, Atmospheric Sciences, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10555

► Clear-sky top-of-atmosphere (TOA) fluxes are important in estimating the impact of clouds on our climate. In this study, we quantitatively compare the clear-sky fluxes measurements… (more)

Subjects/Keywords: Clear-sky fluxes; Inter-annual Anomalies; CERES-EBAF; MERRA; ERA-Interim

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Verma, A. (2012). Definitions of Clear-sky Fluxes and Implications. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10555

Chicago Manual of Style (16^th Edition):

Verma, Abhishek. “Definitions of Clear-sky Fluxes and Implications.” 2012. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10555.

MLA Handbook (7^th Edition):

Verma, Abhishek. “Definitions of Clear-sky Fluxes and Implications.” 2012. Web. 08 Mar 2021.

Vancouver:

Verma A. Definitions of Clear-sky Fluxes and Implications. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10555.

Council of Science Editors:

Verma A. Definitions of Clear-sky Fluxes and Implications. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10555

Texas A&M University

25. Hioki, Souichiro. Characterizing Ice Cloud Particle Shape and Surface Roughness from Polarimetric Satellite Observations.

Degree: PhD, Atmospheric Sciences, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/173761

► The single scattering properties of ice cloud particles are inferred from spaceborne multi-angle satellite sensors with two newly developed noise-resilient retrieval techniques. The first presented… (more)

Subjects/Keywords: ice cloud; polarization; remote sensing; particle surface roughness; particle shape

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hioki, S. (2018). Characterizing Ice Cloud Particle Shape and Surface Roughness from Polarimetric Satellite Observations. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173761

Chicago Manual of Style (16^th Edition):

Hioki, Souichiro. “Characterizing Ice Cloud Particle Shape and Surface Roughness from Polarimetric Satellite Observations.” 2018. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/173761.

MLA Handbook (7^th Edition):

Hioki, Souichiro. “Characterizing Ice Cloud Particle Shape and Surface Roughness from Polarimetric Satellite Observations.” 2018. Web. 08 Mar 2021.

Vancouver:

Hioki S. Characterizing Ice Cloud Particle Shape and Surface Roughness from Polarimetric Satellite Observations. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/173761.

Council of Science Editors:

Hioki S. Characterizing Ice Cloud Particle Shape and Surface Roughness from Polarimetric Satellite Observations. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173761

Texas A&M University

26. Liu, Jianping. Effects of Chirality and Coherence on Light Scattering.

Degree: PhD, Physics, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153505

► In the first part of this dissertation, we study the light scattering properties of particles with chiral structures. Special attention is paid to the dinoflagellates,… (more)

Subjects/Keywords: Light scattering; chirality; coherence; holography

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liu, J. (2014). Effects of Chirality and Coherence on Light Scattering. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153505

Chicago Manual of Style (16^th Edition):

Liu, Jianping. “Effects of Chirality and Coherence on Light Scattering.” 2014. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/153505.

MLA Handbook (7^th Edition):

Liu, Jianping. “Effects of Chirality and Coherence on Light Scattering.” 2014. Web. 08 Mar 2021.

Vancouver:

Liu J. Effects of Chirality and Coherence on Light Scattering. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/153505.

Council of Science Editors:

Liu J. Effects of Chirality and Coherence on Light Scattering. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153505

Texas A&M University

27. Sun, Bingqiang. Simulation and Application of Light Scattering Properties for Scatterers with Large Aspect Ratios.

Degree: PhD, Physics, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/154191

► For scatterers with axial or N-fold rotational symmetry, the T-matrix is one of the most efficient techniques to obtain the scattering properties. Extended boundary condition… (more)

Subjects/Keywords: T-matrix; EBCM; II-TM; Large Aspect Ratios; MBIT; 1-D Periodicity.

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sun, B. (2014). Simulation and Application of Light Scattering Properties for Scatterers with Large Aspect Ratios. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/154191

Chicago Manual of Style (16^th Edition):

Sun, Bingqiang. “Simulation and Application of Light Scattering Properties for Scatterers with Large Aspect Ratios.” 2014. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/154191.

MLA Handbook (7^th Edition):

Sun, Bingqiang. “Simulation and Application of Light Scattering Properties for Scatterers with Large Aspect Ratios.” 2014. Web. 08 Mar 2021.

Vancouver:

Sun B. Simulation and Application of Light Scattering Properties for Scatterers with Large Aspect Ratios. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/154191.

Council of Science Editors:

Sun B. Simulation and Application of Light Scattering Properties for Scatterers with Large Aspect Ratios. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/154191

Texas A&M University

28. Gao, Meng 1981-. Physics of the Structural Color on the Skin of Cephalopods.

Degree: PhD, Physics, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/148161

► The structural colors, produced by leucophore and iridophore cells, are important for cephalopod camouflage; however, their scattering properties have not been very well studied. These… (more)

Subjects/Keywords: structural color; iridophore; leucophore; cephalopod; scattering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gao, M. 1. (2012). Physics of the Structural Color on the Skin of Cephalopods. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/148161

Chicago Manual of Style (16^th Edition):

Gao, Meng 1981-. “Physics of the Structural Color on the Skin of Cephalopods.” 2012. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/148161.

MLA Handbook (7^th Edition):

Gao, Meng 1981-. “Physics of the Structural Color on the Skin of Cephalopods.” 2012. Web. 08 Mar 2021.

Vancouver:

Gao M1. Physics of the Structural Color on the Skin of Cephalopods. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/148161.

Council of Science Editors:

Gao M1. Physics of the Structural Color on the Skin of Cephalopods. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/148161

Texas A&M University

29. Jin, Hongchun 1980-. Satellite Remote Sensing of Mid-level Clouds.

Degree: PhD, Atmospheric Sciences, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/148185

► This dissertation aims to study the mid-level clouds using satellite observations. It consists of two major parts: characteristics (including cloud top/base heights, cloud top pressure… (more)

▼ This dissertation aims to study the mid-level clouds using satellite observations. It consists of two major parts: characteristics (including cloud top/base heights, cloud top pressure and temperature, and cloud thickness) and thermodynamic phase of mid-level clouds. Each part devotes to a particular issue of significant importance for satellite-based remote sensing of mid-level clouds. The first part of this dissertation focuses on the impacts of three definitions of the mid-level clouds based on cloud top pressure, cloud top height, and cloud base height on mid-level cloud characteristics. The impacts of multi-layer clouds on satellite-based global statistics of clouds at different levels, particularly for mid- level clouds, are demonstrated. Mid-level clouds are found to occur more frequently than underlying upper-level clouds. Comparisons of cloud amounts between a merged CALIPSO, CloudSat, CERES, and MODIS (CCCM) dataset and International Satellite Cloud Climatology Project (ISCCP) climatology are made between July 2006 and December 2009. Midlevel cloud characteristics are shown to be sensitive to perturbations in midlevel boundary pressures and heights. The second part focuses on the thermodynamic phase of mid-level clouds. A new algorithm to detect cloud phase using Atmospheric Infrared Sounder (AIRS) high spectral measurements is introduced. The AIRS phase algorithm is based on the newly developed High-spectral-resolution cloudy-sky Radiative Transfer Model (HRTM). The AIRS phase algorithm is evaluated using the CALIPSO cloud phase products for single-layer, heterogeneous, and multi-layer scenes. The AIRS phase algorithm has excellent performance (>90%) in detecting ice clouds compared to the CALIPSO ice clouds. It is capable of detecting optically thin ice clouds in tropics and clouds in the mid-temperature range. Thermodynamic phase of mid-level clouds are investigated using the spatially collocated AIRS phase and CALIPSO phase products between December 2007 and November 2008. Overall, the statistics show that ice, liquid water, and mixed-phase of the mid-level clouds are approximately 20%, 40%, and 40%, globally. Advisors/Committee Members: Nasiri, Shaima (advisor), Brooks, Sarah (committee member), Yang, Ping (committee member), Wilheit, Thomas (committee member), Hetland, Robert (committee member).

Subjects/Keywords: thermodynamic phase; characteristics; cloud; mid-level; remote sensing; satellite

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jin, H. 1. (2012). Satellite Remote Sensing of Mid-level Clouds. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/148185

Chicago Manual of Style (16^th Edition):

Jin, Hongchun 1980-. “Satellite Remote Sensing of Mid-level Clouds.” 2012. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/148185.

MLA Handbook (7^th Edition):

Jin, Hongchun 1980-. “Satellite Remote Sensing of Mid-level Clouds.” 2012. Web. 08 Mar 2021.

Vancouver:

Jin H1. Satellite Remote Sensing of Mid-level Clouds. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/148185.

Council of Science Editors:

Jin H1. Satellite Remote Sensing of Mid-level Clouds. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/148185

30. Cole, Benjamin. On the Microphysical Properties of Ice Clouds as Inferred from the Polarization of Electromagnetic Waves.

Degree: MS, Atmospheric Sciences, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-10144

► Uncertainties associated with the microphysical and radiative properties of ice clouds remain an active research area because of the importance these clouds have in atmospheric… (more)

▼ Uncertainties associated with the microphysical and radiative properties of ice clouds remain an active research area because of the importance these clouds have in atmospheric radiative transfer problems and the energy balance of the Earth. In this study, an adding/doubling model is used to simulate the top of atmosphere (TOA) radiance and full Stokes vector from an ice cloud at the wavelength lambda = 865 nm with many different combinations of assumed ice habits (shapes) and different degrees of ice surface roughness, and the polarized radiance at a wide range of scattering angles is derived. Simulated results are compared with polarized radiance data from the POLDER (POLarization and Directionality of the Earth's Reflectances) instrument on board the PARASOL (Polarization and Anisotropy of Reflectances for Atmospheric Sciences coupled with Observations from a Lidar) satellite. Bulk ice scattering properties are obtained by using five different size distributions collected during field campaigns ranging in effective diameter from 10 micrometers to 90 micrometers. Bulk scattering properties for the MODIS Collection 5 ice cloud product are used in this study, along with properties for two mid-latitude ice cloud models, a polar/mid-latitude ice model, and a model built for ice clouds over deep convection. Solid columns and hollow columns are used as well. The polarized radiance simulation results for the moderate surface roughness level best fit the satellite measurements for all ice models, though severely roughened ice crystals do fare well in a few cases. Hollow columns are the best fit to the satellite polarization measurements, but of the ensemble ice models, the polar/mid-latitude model at an effective diameter of 90 micrometers best fits the polarized radiance measurements for the one day of PARASOL data considered. This model should be the best to simulate ice cloud properties on a global scale. Advisors/Committee Members: Yang, Ping (advisor), Brooks, Sarah (advisor), Kattawar, George (committee member).

Subjects/Keywords: Ensemble ice model; light scattering; surface roughness; polarization; polarized reflectance

14 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cole, B. (2012). On the Microphysical Properties of Ice Clouds as Inferred from the Polarization of Electromagnetic Waves. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-10144

Chicago Manual of Style (16^th Edition):

Cole, Benjamin. “On the Microphysical Properties of Ice Clouds as Inferred from the Polarization of Electromagnetic Waves.” 2012. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-10144.

MLA Handbook (7^th Edition):

Cole, Benjamin. “On the Microphysical Properties of Ice Clouds as Inferred from the Polarization of Electromagnetic Waves.” 2012. Web. 08 Mar 2021.

Vancouver:

Cole B. On the Microphysical Properties of Ice Clouds as Inferred from the Polarization of Electromagnetic Waves. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-10144.

Council of Science Editors:

Cole B. On the Microphysical Properties of Ice Clouds as Inferred from the Polarization of Electromagnetic Waves. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-10144

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations