subject:(Aerosols)

Rutgers University

1. Nguyen, Thien Khoi V., 1989-. Aerosol liquid water: measurement, trends, and implications for atmosphere-biosphere interactions.

Degree: PhD, Environmental Sciences, 2016, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/50110/

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Particle-phase liquid water is a ubiquitous and abundant component of atmospheric aerosols and influences hydrological cycling, fate and transport of trace species, visibility, human health,… (more)

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Particle-phase liquid water is a ubiquitous and abundant component of atmospheric aerosols and influences hydrological cycling, fate and transport of trace species, visibility, human health, and regional climate. Aerosol water mass concentrations are functions of relative humidity (RH), temperature, and aerosol concentration and composition. Previous studies focused on inorganic species, and their relationships to particle hygroscopicity are included in atmospheric models. But there is a dearth of field studies and related ambient information pertaining to water modulation by organic compounds and vice versa. The extent to which water facilitates transfer of biogenically derived carbon from the gas to particle phase to form secondary organic aerosol (SOA), which contributes to the fine particle matter (PM2.5) burden, is poorly constrained. My dissertation aims to 1) better understand the chemical and thermodynamic controls on aerosol water in the Southeast U.S., an area known to contain high concentrations of SOA, through instrument development and field measurements, 2) quantify the temporal, spatial, and aloft trends in aerosol water through observational estimates, and 3) reconcile discrepancies between existing surface and satellite measurements of PM across the continental U.S. using aerosol water. My field measurements of aerosol water found a minimum of 7% water in particles by volume and a diel cycle in water content controlled, in part, by aerosol hygroscopicity, that ranged from 1-5 µg m-3. Next, semi-observational estimates of aerosol water by an inorganic thermodynamic model discovered that aerosol water mass has decreased in the Southeast by 79% between 2001-2012. Similar reductions of biogenically derived SOA mass in the area are consistent with an aerosol water-mediated mechanism and the correlation in water and SOA mass is statistically robust. Finally, estimates of aerosol water across the continental U.S. yield seasonal differences that were highest in the Southeast and modulated by aerosol chemistry and not RH. Near surface trends in aerosol water are qualitatively similar to space-based aerosol optical thickness measurements and potentially resolve surface and satellite PM measurements. Ultimately, this work contributes to improving our understanding of the connections among aerosol water, biogenic and anthropogenic emissions, and biogenic SOA formed in the presence of anthropogenic perturbations.

Advisors/Committee Members: Carlton, Ann Marie G. (chair), Turpin, Barbara J. (internal member), Mainelis, Gediminas (internal member), Petters, Markus D. (outside member).

Subjects/Keywords: Aerosols; Atmospheric aerosols

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APA (6^th Edition):

Nguyen, Thien Khoi V., 1. (2016). Aerosol liquid water: measurement, trends, and implications for atmosphere-biosphere interactions. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/50110/

Chicago Manual of Style (16^th Edition):

Nguyen, Thien Khoi V., 1989-. “Aerosol liquid water: measurement, trends, and implications for atmosphere-biosphere interactions.” 2016. Doctoral Dissertation, Rutgers University. Accessed March 02, 2021. https://rucore.libraries.rutgers.edu/rutgers-lib/50110/.

MLA Handbook (7^th Edition):

Nguyen, Thien Khoi V., 1989-. “Aerosol liquid water: measurement, trends, and implications for atmosphere-biosphere interactions.” 2016. Web. 02 Mar 2021.

Vancouver:

Nguyen, Thien Khoi V. 1. Aerosol liquid water: measurement, trends, and implications for atmosphere-biosphere interactions. [Internet] [Doctoral dissertation]. Rutgers University; 2016. [cited 2021 Mar 02]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50110/.

Council of Science Editors:

Nguyen, Thien Khoi V. 1. Aerosol liquid water: measurement, trends, and implications for atmosphere-biosphere interactions. [Doctoral Dissertation]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50110/

Oregon State University

2. Brown, Daniel A. Effects of aerosols on the properties of deep convective clouds.

Degree: MS, Atmospheric Sciences, 2010, Oregon State University

URL: http://hdl.handle.net/1957/16197

► Aerosols are tiny particles that serve as nuclei for cloud droplet and ice crystal formation. Increases in aerosol concentration lead to clouds with smaller but… (more)

▼ Aerosols are tiny particles that serve as nuclei for cloud droplet and ice crystal formation. Increases in aerosol concentration lead to clouds with smaller but more numerous droplets. Some recent studies have found evidence that ice crystal size in deep convective clouds is also reduced by elevated aerosol concentrations. In this study, aerosol, cloud, and radiation data in the Clouds and Earth’s Radiant Energy System (CERES) Single Satellite Footprint (SSF) datastream are used to examine the findings of the earlier studies. Three years of CERES observations were used to survey the Earth for aerosols and deep convective clouds. A CERES field of view (FOV) was taken to contain a deep convective cloud if the 11-micron brightness temperature was below 210 K. To ensure that the cloud was in a region of active convection, the cloud had to be opaque at 11 microns. South America, Equatorial Africa, and the Northern Indian Ocean exhibited relatively high frequencies of deep convective clouds and contained high aerosol burdens. For each day, within each geographic region, 2° × 2° latitude × longitude regions that contained both deep convective clouds and aerosol retrievals were examined. If within a 10° × 10° region on a given day, two or more of the 2° × 2° regions were found, the differences in the properties of the clouds collocated with the large and small aerosol burdens were calculated. Differences in cloud properties were compared to simultaneous differences in aerosol burdens. This strategy ensured that the clouds and aerosols existed simultaneously and that the clouds with large aerosol burdens shared similar large-scale meteorology as those with small aerosol burdens. No link was found between the differences in aerosol burdens and deep convective cloud properties in any of the regions and seasons analyzed. Relationships among ice crystal size, cloud optical depth, and 11-micron brightness temperature were also investigated. Ice crystal diameter was found to decrease with decreasing cloud temperature. Likewise, cloud optical depth increased with decreasing cloud temperature. Such relationships among cloud properties and the inclusion of semitransparent clouds in earlier studies may explain why the findings of this study differ from those of earlier studies. Advisors/Committee Members: Coakley, James A. (advisor), Shell, Karen (committee member).

Subjects/Keywords: aerosols; Aerosols – Environmental aspects

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APA (6^th Edition):

Brown, D. A. (2010). Effects of aerosols on the properties of deep convective clouds. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/16197

Chicago Manual of Style (16^th Edition):

Brown, Daniel A. “Effects of aerosols on the properties of deep convective clouds.” 2010. Masters Thesis, Oregon State University. Accessed March 02, 2021. http://hdl.handle.net/1957/16197.

MLA Handbook (7^th Edition):

Brown, Daniel A. “Effects of aerosols on the properties of deep convective clouds.” 2010. Web. 02 Mar 2021.

Vancouver:

Brown DA. Effects of aerosols on the properties of deep convective clouds. [Internet] [Masters thesis]. Oregon State University; 2010. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1957/16197.

Council of Science Editors:

Brown DA. Effects of aerosols on the properties of deep convective clouds. [Masters Thesis]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/16197

Oregon State University

3. Dobie, Norman Dale. Thermo-aerosol fumigation to increase the fungitoxicity of chloropicrin in storage house disinfestation.

Degree: PhD, Botany, 1954, Oregon State University

URL: http://hdl.handle.net/1957/51697

Subjects/Keywords: Aerosols

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APA (6^th Edition):

Dobie, N. D. (1954). Thermo-aerosol fumigation to increase the fungitoxicity of chloropicrin in storage house disinfestation. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/51697

Chicago Manual of Style (16^th Edition):

Dobie, Norman Dale. “Thermo-aerosol fumigation to increase the fungitoxicity of chloropicrin in storage house disinfestation.” 1954. Doctoral Dissertation, Oregon State University. Accessed March 02, 2021. http://hdl.handle.net/1957/51697.

MLA Handbook (7^th Edition):

Dobie, Norman Dale. “Thermo-aerosol fumigation to increase the fungitoxicity of chloropicrin in storage house disinfestation.” 1954. Web. 02 Mar 2021.

Vancouver:

Dobie ND. Thermo-aerosol fumigation to increase the fungitoxicity of chloropicrin in storage house disinfestation. [Internet] [Doctoral dissertation]. Oregon State University; 1954. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1957/51697.

Council of Science Editors:

Dobie ND. Thermo-aerosol fumigation to increase the fungitoxicity of chloropicrin in storage house disinfestation. [Doctoral Dissertation]. Oregon State University; 1954. Available from: http://hdl.handle.net/1957/51697

4. Zhang, Lu. Design and numerical simulation of the real-time particle charge and size analyser.

Degree: PhD, University of Glamorgan, 2012, University of South Wales

URL: http://hdl.handle.net/10265/567

► The electrostatic charge and size distribution of aerosol particles play a very important role in many industrial applications. Due to the complexity and the probabilistic… (more)

▼ The electrostatic charge and size distribution of aerosol particles play a very important role in many industrial applications. Due to the complexity and the probabilistic nature of the different charging mechanisms often acting simultaneously, it is difficult to theoretically predict the charge distribution of aerosol particles or even estimate the relative effect of the different mechanisms. Therefore, it is necessary to measure the size and also the bipolar charge distribution on aerosol particles. The main aim of this research project was to design, implement and simulate a signal processing system for novel, fully functional measurement instrument capable of simultaneously measuring in real time the bipolar charge and size distribution of medical aerosols. The Particle Size and Charge Analyser (PSCA), investigated in this thesis, uses Phase Doppler Anemometry (PDA) technique. The PDA system was used to track the motion of charged particles in the presence of an electric field. By solving the equation of particle motion in a viscous medium combined with the simultaneous measurement of its size and velocity, the magnitude as well as the polarity of the particle charge can be obtained. Different signal processing systems in different excitation fields have been designed and implemented. These systems include: velocity estimation system using spectral analysis in DC excitation field, velocity estimation system based on Phase Locked Loop (PLL) technique working in DC as well as sine-wave excitation fields, velocity estimation system based on Quadrature Demodulation (QD) technique under sine-wave excitation method, velocity estimation system using spectral analysis in square-wave excitation field and phase shift estimation based on Hilbert transformation and correlation technique in both sine-wave and square-wave excitation fields. The performances of these systems were evaluated using Monte Carlo (MC) simulations obtained from the synthesized Doppler burst signals generated from the mathematical models implemented in MATLAB. The synthesized Doppler Burst Signal (DBS) was subsequently corrupted with the added Gaussian noise. Cross validation of the results was performed using hardware signal processing system employing Arbitrary Waveform Generator and also NASA simulator to further confirm the validity of the estimation.

Subjects/Keywords: Aerosols; 681.761

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APA (6^th Edition):

Zhang, L. (2012). Design and numerical simulation of the real-time particle charge and size analyser. (Doctoral Dissertation). University of South Wales. Retrieved from http://hdl.handle.net/10265/567

Chicago Manual of Style (16^th Edition):

Zhang, Lu. “Design and numerical simulation of the real-time particle charge and size analyser.” 2012. Doctoral Dissertation, University of South Wales. Accessed March 02, 2021. http://hdl.handle.net/10265/567.

MLA Handbook (7^th Edition):

Zhang, Lu. “Design and numerical simulation of the real-time particle charge and size analyser.” 2012. Web. 02 Mar 2021.

Vancouver:

Zhang L. Design and numerical simulation of the real-time particle charge and size analyser. [Internet] [Doctoral dissertation]. University of South Wales; 2012. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10265/567.

Council of Science Editors:

Zhang L. Design and numerical simulation of the real-time particle charge and size analyser. [Doctoral Dissertation]. University of South Wales; 2012. Available from: http://hdl.handle.net/10265/567

Oregon State University

5. Sing, Edmond Lee. Bacteriophage destruction by aerosols of dichloroisocyanuric acid and other germicides.

Degree: MS, Microbiology and Hygiene, 1962, Oregon State University

URL: http://hdl.handle.net/1957/49568

Subjects/Keywords: Aerosols

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APA (6^th Edition):

Sing, E. L. (1962). Bacteriophage destruction by aerosols of dichloroisocyanuric acid and other germicides. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/49568

Chicago Manual of Style (16^th Edition):

Sing, Edmond Lee. “Bacteriophage destruction by aerosols of dichloroisocyanuric acid and other germicides.” 1962. Masters Thesis, Oregon State University. Accessed March 02, 2021. http://hdl.handle.net/1957/49568.

MLA Handbook (7^th Edition):

Sing, Edmond Lee. “Bacteriophage destruction by aerosols of dichloroisocyanuric acid and other germicides.” 1962. Web. 02 Mar 2021.

Vancouver:

Sing EL. Bacteriophage destruction by aerosols of dichloroisocyanuric acid and other germicides. [Internet] [Masters thesis]. Oregon State University; 1962. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1957/49568.

Council of Science Editors:

Sing EL. Bacteriophage destruction by aerosols of dichloroisocyanuric acid and other germicides. [Masters Thesis]. Oregon State University; 1962. Available from: http://hdl.handle.net/1957/49568

Oregon State University

6. Tomine, Chris Shinya. Integrated forward light scattering as a measure of aerosol mass concentration.

Degree: PhD, Mechanical Engineering, 1973, Oregon State University

URL: http://hdl.handle.net/1957/44801

► A mathematical model was developed that relates the ratio, R, of two light flux measurements to the mass concentration, m, of the atmospheric aerosol particles… (more)

Subjects/Keywords: Aerosols

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APA (6^th Edition):

Tomine, C. S. (1973). Integrated forward light scattering as a measure of aerosol mass concentration. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/44801

Chicago Manual of Style (16^th Edition):

Tomine, Chris Shinya. “Integrated forward light scattering as a measure of aerosol mass concentration.” 1973. Doctoral Dissertation, Oregon State University. Accessed March 02, 2021. http://hdl.handle.net/1957/44801.

MLA Handbook (7^th Edition):

Tomine, Chris Shinya. “Integrated forward light scattering as a measure of aerosol mass concentration.” 1973. Web. 02 Mar 2021.

Vancouver:

Tomine CS. Integrated forward light scattering as a measure of aerosol mass concentration. [Internet] [Doctoral dissertation]. Oregon State University; 1973. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1957/44801.

Council of Science Editors:

Tomine CS. Integrated forward light scattering as a measure of aerosol mass concentration. [Doctoral Dissertation]. Oregon State University; 1973. Available from: http://hdl.handle.net/1957/44801

Oregon State University

7. Yun, Kyung Woo. An experimental investigation of aerosol coagulation in the shock tube: Aerosol coagulation in the shock tube.

Degree: PhD, Mechanical and Nuclear Engineering, 1970, Oregon State University

URL: http://hdl.handle.net/1957/45811

► Ammonium chloride aerosols of submicron size generated by condensation and dispersion methods were treated, shortly after aerosol charging, with shock waves originating from diaphragm pressure… (more)

Subjects/Keywords: Aerosols

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APA (6^th Edition):

Yun, K. W. (1970). An experimental investigation of aerosol coagulation in the shock tube: Aerosol coagulation in the shock tube. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/45811

Chicago Manual of Style (16^th Edition):

Yun, Kyung Woo. “An experimental investigation of aerosol coagulation in the shock tube: Aerosol coagulation in the shock tube.” 1970. Doctoral Dissertation, Oregon State University. Accessed March 02, 2021. http://hdl.handle.net/1957/45811.

MLA Handbook (7^th Edition):

Yun, Kyung Woo. “An experimental investigation of aerosol coagulation in the shock tube: Aerosol coagulation in the shock tube.” 1970. Web. 02 Mar 2021.

Vancouver:

Yun KW. An experimental investigation of aerosol coagulation in the shock tube: Aerosol coagulation in the shock tube. [Internet] [Doctoral dissertation]. Oregon State University; 1970. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1957/45811.

Council of Science Editors:

Yun KW. An experimental investigation of aerosol coagulation in the shock tube: Aerosol coagulation in the shock tube. [Doctoral Dissertation]. Oregon State University; 1970. Available from: http://hdl.handle.net/1957/45811

Colorado State University

8. Mentele, Mallory M. Novel microfluidic devices for aerosol analysis.

Degree: PhD, Chemistry, 2012, Colorado State University

URL: http://hdl.handle.net/10217/67619

► Widespread interest in microfluidic technology over the past 20 years has led to the development of microfluidic devices that are as varied in their complexity… (more)

▼ Widespread interest in microfluidic technology over the past 20 years has led to the development of microfluidic devices that are as varied in their complexity and capabilities as they are in the applications they are used for. This dissertation describes the development of two microfluidic devices, each designed for measurement of specific aerosol components. A microchip incorporating an interface between a continuous hydrodynamic sample flow and capillary electrophoresis separation was developed for analysis of atmospheric aerosols. The ability to separate and detect analytes from a continuous sample flow allows the microchip to be coupled to a particle-into-liquid aerosol sampler, providing a method for near real-time analysis of ionic aerosol components. Theoretical modeling of hydrodynamic and electroosmotic flows was used to predict flow behavior in the microchip and to optimize geometry. Separation and conductivity detection of common ionic aerosol components were carried out to observe device performance, and detection of nitrate and sulfate in Fort Collins air was accomplished with the coupled system. The simple design introduced here is the first example of a continuous flow microfluidic capillary electrophoresis device that incorporates conductivity detection, and is the first microfluidic device to be coupled to a continuous flow aerosol collector. A paper-based microfluidic device was also designed for the purpose of assessing occupational exposure to particulate metals. Assays were developed for colorimetric detection of metals on paper and these were employed in detection reservoirs of the device. A novel method was also developed for rapid digestion of particulate metals directly on a filter. Metal concentrations were quantified from color intensity images using a scanner in conjunction with image processing software. Finally, a standard incineration ash sample was aerosolized, collected on filters, and analyzed for the three metals of interest. This is the first paper-based device capable of multiplexed metal detection from a real, aerosolized sample. Advisors/Committee Members: Henry, Charles (advisor), Barisas, George (committee member), Reynolds, Melissa (committee member), Ladanyi, Branka (committee member), Kreidenweis, Sonia (committee member).

Subjects/Keywords: aerosols; microfluidics

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APA (6^th Edition):

Mentele, M. M. (2012). Novel microfluidic devices for aerosol analysis. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/67619

Chicago Manual of Style (16^th Edition):

Mentele, Mallory M. “Novel microfluidic devices for aerosol analysis.” 2012. Doctoral Dissertation, Colorado State University. Accessed March 02, 2021. http://hdl.handle.net/10217/67619.

MLA Handbook (7^th Edition):

Mentele, Mallory M. “Novel microfluidic devices for aerosol analysis.” 2012. Web. 02 Mar 2021.

Vancouver:

Mentele MM. Novel microfluidic devices for aerosol analysis. [Internet] [Doctoral dissertation]. Colorado State University; 2012. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10217/67619.

Council of Science Editors:

Mentele MM. Novel microfluidic devices for aerosol analysis. [Doctoral Dissertation]. Colorado State University; 2012. Available from: http://hdl.handle.net/10217/67619

University of Missouri – Columbia

9. Kothakapa, Rajya Vardhan Reddy. Design of experimental apparatus for generation and measurement of an aerosol.

Degree: 2017, University of Missouri – Columbia

URL: http://hdl.handle.net/10355/62356

► This work is done as a requirement for the master's degree. In this work, a system for generating aerosol delivery into shock tube for interface… (more)

▼ This work is done as a requirement for the master's degree. In this work, a system for generating aerosol delivery into shock tube for interface creation and a method to measure aerosol is developed. In chapter 1, a brief introduction of hydrodynamic instabilities later focussing on shock driven multiphase instabilities (SDMI) and its importance is presented. SDMIs have similar flow morphology to the Richtmeyer-Meshkov Instability (RMI), however, the driving force that induces instability is different. Current methods of aerosol production and measurement with pros and cons are given to justify the adaption of the selected method for our system. Chapter 2 discusses about the theory of ultrasonic atomization and evidence of faraday instability for atomization. Later setup of aerosol delivery system with two different set of atomizers is presented. In chapter 3, Laser interferometry principle and apparatus used for the measurement of aerosol with the consideration of various factors is given. To avoid Mie scattering theory's intense use of calculations Geometrical optics approximation method is used which agrees well with the Mie theory for all the particles above 1µm. Chapter 4 presents experimental results of measurement which includes particle size distribution, density measurement of aerosol. Later it presents the experimental results when the aerosol is used for the study of SDMI. Two different cases, one with the low effective Atwood number and the other with higher effective Atwood number are investigated. In the case of low effective Atwood number the instability evolved is more like RMI rather than SDMI which is due to domination of Gas Atwood number over effect Atwood number. Last case with higher effective Atwood number of 0.03 with shock wave of Mach 1.66 is investigated, to find out that flow morphologies are in good agreement with literature and simulations. Chapter 5 gives conclusion of the research studies and future research. Advisors/Committee Members: McFarland, Jacob A. (advisor), Yu, Ping (advisor).

Subjects/Keywords: Aerosols – Measurement

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APA (6^th Edition):

Kothakapa, R. V. R. (2017). Design of experimental apparatus for generation and measurement of an aerosol. (Thesis). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/62356

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kothakapa, Rajya Vardhan Reddy. “Design of experimental apparatus for generation and measurement of an aerosol.” 2017. Thesis, University of Missouri – Columbia. Accessed March 02, 2021. http://hdl.handle.net/10355/62356.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kothakapa, Rajya Vardhan Reddy. “Design of experimental apparatus for generation and measurement of an aerosol.” 2017. Web. 02 Mar 2021.

Vancouver:

Kothakapa RVR. Design of experimental apparatus for generation and measurement of an aerosol. [Internet] [Thesis]. University of Missouri – Columbia; 2017. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10355/62356.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kothakapa RVR. Design of experimental apparatus for generation and measurement of an aerosol. [Thesis]. University of Missouri – Columbia; 2017. Available from: http://hdl.handle.net/10355/62356

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

10. Ren, Tong. Aerosol Lightning Enhancement over Northern Alabama: Predictions, Mechanisms, and Simulations.

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

URL: http://hdl.handle.net/1969.1/174453

► Satellite aerosol retrievals, ground-based radar and lightning detections, and model simulations are used to study the impact of aerosols on lightning and the usefulness of… (more)

▼ Satellite aerosol retrievals, ground-based radar and lightning detections, and model simulations are used to study the impact of aerosols on lightning and the usefulness of knowing the aerosol state in predicting enhanced lightning over northern Alabama. The results show that the Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD) retrievals are less useful in predicting enhanced lightning flash rate (FR) for lightning-producing storms than the forecasts of other meteorological variables that are more closely linked to the intensification of convective storms. However, when relatively weaker convective available potential energy (CAPE) is forecast, the probability of enhanced lightning FR increases in a more polluted environment, making the knowledge of aerosols more useful in lightning inference in such CAPE regimes. The FR shows a stronger correlation with the optical depth of absorbing aerosols than that of non-absorbing aerosols, particularly in a low CAPE regime, suggestive of a potentially stronger regulation of storms by absorbing aerosols. The presence of absorbing aerosols may lead to the accumulation of CAPE, as suggested by an increased correlation between AOD and CAPE in the presence of absorbing aerosols. The optical depth of absorbing aerosols shows a weak negative correlation with the planetary boundary layer height (PBLH), suggesting that the interaction between absorbing aerosols and turbulent mixing may contribute to the regulation of lightning-producing storms. Aerosol enhancement of lightning may be associated with enhanced convergence in the boundary layer and secondary convection, which appears to result from a synthesis of multiple mechanisms related to both microphysical and radiative effects of aerosols. The impact of absorbing aerosols on deep convection is sensitive to the height of aerosol layer. A sensitivity modeling study suggests that a daytime heating layer above the PBL suppresses deep convection in the early afternoon and enhances nighttime storms when the accumulated CAPE is released. A daytime heating layer within the PBL delays the onset of the enhanced nighttime storms and may result in a faster development of the storms at night; the enhanced evaporation of cloud and rain water droplets right before the onset of nighttime storms may contribute to the onset delay. Advisors/Committee Members: Rapp, Anita D. (advisor), Brooks, Sarah D. (advisor), Korty, Robert L. (committee member), Sang, Huiyan (committee member).

Subjects/Keywords: Aerosols; Lightning

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APA (6^th Edition):

Ren, T. (2018). Aerosol Lightning Enhancement over Northern Alabama: Predictions, Mechanisms, and Simulations. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174453

Chicago Manual of Style (16^th Edition):

Ren, Tong. “Aerosol Lightning Enhancement over Northern Alabama: Predictions, Mechanisms, and Simulations.” 2018. Doctoral Dissertation, Texas A&M University. Accessed March 02, 2021. http://hdl.handle.net/1969.1/174453.

MLA Handbook (7^th Edition):

Ren, Tong. “Aerosol Lightning Enhancement over Northern Alabama: Predictions, Mechanisms, and Simulations.” 2018. Web. 02 Mar 2021.

Vancouver:

Ren T. Aerosol Lightning Enhancement over Northern Alabama: Predictions, Mechanisms, and Simulations. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1969.1/174453.

Council of Science Editors:

Ren T. Aerosol Lightning Enhancement over Northern Alabama: Predictions, Mechanisms, and Simulations. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174453

Rutgers University

11. Mukherjee, Pami, 1986-. Investigation of chemical and physical processes on Arctic aerosols through a combined approach of field and laboratory studies.

Degree: PhD, Environmental Science, 2018, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/59332/

►

The causes and effects of recent global warming have been studied extensively; but, the role of atmospheric aerosols in the Arctic biogeochemistry has not been… (more)

▼

The causes and effects of recent global warming have been studied extensively; but, the role of atmospheric aerosols in the Arctic biogeochemistry has not been widely explored yet.The water-soluble Arctic aerosols directly impact the climate by participating in cloud formation and influencing its radiative property. Moreover, the amplified Arctic warming may significantly influence the solubility and bio-availability of aerosol iron (Fe)—which is a limiting nutrient for phytoplankton growth, an important sink for atmospheric carbon dioxide (CO2). This research investigates the chemical and physical processes on aerosols that were collected during the US Geotraces Arctic cruise in summer 2015 and natural snow samples from Newark, New Jersey in conjunction with laboratory experiments involving Fe minerals and organic ligands. We hypothesize that the Arctic aerosols were modified by various natural and anthropogenic processes, affecting the concentrations and hygroscopic properties of the cloud condensation nuclei and soluble Fe input to the Arctic Ocean. Laboratory studies with hematite and major organic ligands showed that oxalate, when present above a threshold amount, had a significant effect on the absorptive dissolution of Fe. The results from the Arctic Ocean expedition showed that coarse mode sea-salt was the major aerosol component and non-sea-salt-sulfate was significantly present in fine mode aerosol particles. Among the organic species, oxalate, acetate, and formate were the major components among the species examined at the pole. Calcium was enriched on the sea-spray aerosols, pre-dominantly in the fine mode, leading to significant modification of the aerosol hygroscopic growth factor. Analysis of the natural snow and ice-melts showed that freezing could induce compaction and clustering of particles, but had negligible effect on modulating Fe solubility.This study provides significant insight into the water soluble component of Arctic summer aerosols regarding their concentrations, sources, and possible formation mechanisms, and their effects on the Arctic climate via cloud formation. The laboratory based experiments increase our understanding of the effects of various processes occurring in Arctic aerosols—including the accumulation and reactions of organic components in aerosols and the freeze concentration effect on iron chemistry, which could affect the biogeochemical cycles in the Arctic Ocean.

Advisors/Committee Members: Mukherjee, Pami, 1986- (author), Gao, Yuan (chair), Reinfelder, John (internal member), Rouff, Ashaki (internal member), Khalizov, Alexei (outside member).

Subjects/Keywords: Atmospheric aerosols

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APA (6^th Edition):

Mukherjee, Pami, 1. (2018). Investigation of chemical and physical processes on Arctic aerosols through a combined approach of field and laboratory studies. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/59332/

Chicago Manual of Style (16^th Edition):

Mukherjee, Pami, 1986-. “Investigation of chemical and physical processes on Arctic aerosols through a combined approach of field and laboratory studies.” 2018. Doctoral Dissertation, Rutgers University. Accessed March 02, 2021. https://rucore.libraries.rutgers.edu/rutgers-lib/59332/.

MLA Handbook (7^th Edition):

Mukherjee, Pami, 1986-. “Investigation of chemical and physical processes on Arctic aerosols through a combined approach of field and laboratory studies.” 2018. Web. 02 Mar 2021.

Vancouver:

Mukherjee, Pami 1. Investigation of chemical and physical processes on Arctic aerosols through a combined approach of field and laboratory studies. [Internet] [Doctoral dissertation]. Rutgers University; 2018. [cited 2021 Mar 02]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/59332/.

Council of Science Editors:

Mukherjee, Pami 1. Investigation of chemical and physical processes on Arctic aerosols through a combined approach of field and laboratory studies. [Doctoral Dissertation]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/59332/

12. Lakshmi N B; Suresh Babu S. Investigations of elevated aerosols over the Indian region and their radiative impacts.

Degree: 2019, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/5526

Subjects/Keywords: Aerosols; Elevated aerosols

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APA (6^th Edition):

S, L. N. B. S. B. (2019). Investigations of elevated aerosols over the Indian region and their radiative impacts. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/5526

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

S, Lakshmi N B; Suresh Babu. “Investigations of elevated aerosols over the Indian region and their radiative impacts.” 2019. Thesis, Cochin University of Science and Technology. Accessed March 02, 2021. http://dyuthi.cusat.ac.in/purl/5526.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

S, Lakshmi N B; Suresh Babu. “Investigations of elevated aerosols over the Indian region and their radiative impacts.” 2019. Web. 02 Mar 2021.

Vancouver:

S LNBSB. Investigations of elevated aerosols over the Indian region and their radiative impacts. [Internet] [Thesis]. Cochin University of Science and Technology; 2019. [cited 2021 Mar 02]. Available from: http://dyuthi.cusat.ac.in/purl/5526.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

S LNBSB. Investigations of elevated aerosols over the Indian region and their radiative impacts. [Thesis]. Cochin University of Science and Technology; 2019. Available from: http://dyuthi.cusat.ac.in/purl/5526

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

13. Sachdeva, Kamna. A study of carbonaceous aerosols in Delhi; -.

Degree: Environmental Sciences, 2008, Jawaharlal Nehru University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/29563

None

Appendices p.i-vii, Photo Gallery, Vitae, Figures p.i-iv, Tables p.v-vi, Abbrevations vii-viii

Advisors/Committee Members: Attri, Arun K.

Subjects/Keywords: Carbonaceous; aerosols; Delhi

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APA (6^th Edition):

Sachdeva, K. (2008). A study of carbonaceous aerosols in Delhi; -. (Thesis). Jawaharlal Nehru University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/29563

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sachdeva, Kamna. “A study of carbonaceous aerosols in Delhi; -.” 2008. Thesis, Jawaharlal Nehru University. Accessed March 02, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/29563.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sachdeva, Kamna. “A study of carbonaceous aerosols in Delhi; -.” 2008. Web. 02 Mar 2021.

Vancouver:

Sachdeva K. A study of carbonaceous aerosols in Delhi; -. [Internet] [Thesis]. Jawaharlal Nehru University; 2008. [cited 2021 Mar 02]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/29563.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sachdeva K. A study of carbonaceous aerosols in Delhi; -. [Thesis]. Jawaharlal Nehru University; 2008. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/29563

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Addis Ababa University

14. Tamiru, Bayissa. RADON PROGENY DEPOSITION IN RESPIRATORY TRACT: COMPARATIVE ANALYSIS OF MODELS .

Degree: 2012, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/1187

► Cheng (2003) model of the extra-thoracic respiratory tract was used to calculate the deposition efficiency of aerosols of aerodynamic diameter ranging from 0.1 m to… (more)

Subjects/Keywords: aerosols; aerodynamic diameter

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APA (6^th Edition):

Tamiru, B. (2012). RADON PROGENY DEPOSITION IN RESPIRATORY TRACT: COMPARATIVE ANALYSIS OF MODELS . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1187

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tamiru, Bayissa. “RADON PROGENY DEPOSITION IN RESPIRATORY TRACT: COMPARATIVE ANALYSIS OF MODELS .” 2012. Thesis, Addis Ababa University. Accessed March 02, 2021. http://etd.aau.edu.et/dspace/handle/123456789/1187.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tamiru, Bayissa. “RADON PROGENY DEPOSITION IN RESPIRATORY TRACT: COMPARATIVE ANALYSIS OF MODELS .” 2012. Web. 02 Mar 2021.

Vancouver:

Tamiru B. RADON PROGENY DEPOSITION IN RESPIRATORY TRACT: COMPARATIVE ANALYSIS OF MODELS . [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2021 Mar 02]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1187.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tamiru B. RADON PROGENY DEPOSITION IN RESPIRATORY TRACT: COMPARATIVE ANALYSIS OF MODELS . [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1187

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado State University

15. Nelson, Robert R. Impact of aerosols on space-based retrievals of carbon dioxide, The.

Degree: MS(M.S.), Atmospheric Science, 2015, Colorado State University

URL: http://hdl.handle.net/10217/166883

► This work describes an investigation into the impact of aerosols on space-based retrievals of the column-averaged dry-air mole fraction of carbon dioxide (XCO2). It was… (more)

▼ This work describes an investigation into the impact of aerosols on space-based retrievals of the column-averaged dry-air mole fraction of carbon dioxide (XCO2). It was initially hypothesized that a simplified non-scattering, or "clear sky", retrieval, which neglects scattering and absorption by clouds and aerosols, could potentially avoid errors and biases brought about by attempting to measure properties of clouds and aerosols when there are none present. Clear sky retrievals have the benefit of being orders of magnitude faster and potentially as accurate as "full physics" retrievals that attempt to gain information about clouds and aerosols. Real data from the Greenhouse Gases Observing Satellite (GOSAT) and simulated data from the Orbiting Carbon Observatory-2 (OCO-2) were analyzed to find conditions under which a clear sky retrieval might perform as well as a full physics retrieval. It was found that for real GOSAT data the clear sky retrieval performed relatively well over land but not as well over ocean. The opposite conclusion was found for simulated OCO-2 data: it performed well over ocean but poorly over land. For both real GOSAT data and simulated OCO-2 data, high levels of filtering were needed for the clear sky retrieval to be able to perform nearly as well as or better than the full physics retrieval for both land and ocean surfaces. Spectral residuals were then examined to determine if the clear sky algorithm's performance was tied to errors in the spectral fitting. It was found that the clear sky retrievals had larger residuals than the full physics retrievals but that reducing the clear sky residuals by allowing them to fit for a customized residual pattern did little to reduce the XCO2 errors. It was also shown that even very clear scenes can result in small but detectable clear sky residual patterns. A comparison of cloud and aerosol properties measured by the XCO2 retrieval algorithm to aerosol optical depths from the AErosol RObotic NETwork (AERONET) revealed that the algorithm is generally unable to accurately retrieve information about the amount of clouds and aerosols present. Using OCO-2 simulations, it was shown that the algorithm is also only somewhat able to retrieve the heights of the aerosol layers. Information retrieved about individual aerosol types was shown to be even less accurate. Finally, early work in this study prompted investigation into how sensitive the XCO2 retrieval algorithm is to the first guess of aerosol properties. χ² space was explored by varying the first guess of various aerosol parameters. It was revealed that the retrieved aerosol information and XCO2 values can be highly sensitive to the first guess of the state vector, indicating significant nonlinearity in the retrieval's forward model. Two main conclusions were derived from this work. The first is that an analysis of real GOSAT clear sky XCO2 retrievals and simulated OCO-2 clear sky XCO2 retrievals revealed that the clear sky algorithm is generally inferior to the full physics algorithm, except for… Advisors/Committee Members: O'Dell, Christopher W. (advisor), Denning, A. Scott (committee member), Kummerow, Christian D. (committee member), Lefsky, Michael A. (committee member).

Subjects/Keywords: carbon dioxide; aerosols

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APA (6^th Edition):

Nelson, R. R. (2015). Impact of aerosols on space-based retrievals of carbon dioxide, The. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/166883

Chicago Manual of Style (16^th Edition):

Nelson, Robert R. “Impact of aerosols on space-based retrievals of carbon dioxide, The.” 2015. Masters Thesis, Colorado State University. Accessed March 02, 2021. http://hdl.handle.net/10217/166883.

MLA Handbook (7^th Edition):

Nelson, Robert R. “Impact of aerosols on space-based retrievals of carbon dioxide, The.” 2015. Web. 02 Mar 2021.

Vancouver:

Nelson RR. Impact of aerosols on space-based retrievals of carbon dioxide, The. [Internet] [Masters thesis]. Colorado State University; 2015. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10217/166883.

Council of Science Editors:

Nelson RR. Impact of aerosols on space-based retrievals of carbon dioxide, The. [Masters Thesis]. Colorado State University; 2015. Available from: http://hdl.handle.net/10217/166883

Rutgers University

16. Zhen, Huajun, 1985-. Investigation of bioaerosol characterization bias due to aerosolization and sampling.

Degree: PhD, Environmental Sciences, 2015, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/47620/

►

Bioaerosols have been investigated for their adverse effects on human health and also their roles in cloud formation, precipitation and atmospheric chemical reactions. In these… (more)

▼

Bioaerosols have been investigated for their adverse effects on human health and also their roles in cloud formation, precipitation and atmospheric chemical reactions. In these studies, it is often necessary to collect biological cells from the airborne state or to disperse the cells into the air using a variety of sampling and aerosolization devices. These devices inevitably exert stress on the cells and result in changes in their biological characteristics, e.g. loss of culturability, impairment of cell membrane, and change in cellular activities. It is highly likely that after experiencing such stress, collected microorganisms are not representative of cells prior to sampling and aerosolization, and thus could introduce biases in their characterization. In this dissertation, the potential bioaerosol characterization biases induced by several commonly used sampling and aerosolization devices were investigated. The stress experienced by E. coli during aerosolization was found to depend on a particular aerosolization device. Particularly, a newly developed pneumatic nebulizer, the Single-Pass Aerosolizer, was shown to better preserve cell culturability and membrane integrity compared to the commonly used Collison nebulizer at similar biological particles output concentrations. Several bioaerosol samplers that employ filtration, impingement, impaction and electrostatic precipitation for sample collection were tested with respect to their effects on the cell membrane integrity and cellular 16S rRNA content of Escherichia coli cells. Sampling stress resulted in severe membrane impairment to E. coli aerosols, leading to the release of genomic DNA as extracellular molecules. Extracellular DNA should be taken into account when analyzing bioaerosol samples to more accurately quantify bacterial presence. Cell membrane damage to bioaerosols depended on which sampler was used and could be reduced by modifying specific operational parameters. E. coli cells exhibited variation in 16S ribosomal RNA (rRNA) level when exposed to long-term air sampling in laboratory experiment, suggesting a change of biological activity in response to sampling stress. The importance of this effect for those taxa in airborne bacterial community from a variety of environments should be examined. The abundance of bacterial 16S rRNA in bioaerosols collected from an outdoor environment was about two orders of magnitude higher than that of 16S rRNA gene. However, the sampler-dependent bias effect on analysis of 16S rRNA sequences for bacterial community composition was minimal in investigated outdoor bioaerosols.

Advisors/Committee Members: Mainelis, Gediminas (chair), Fennell, Donna E (internal member), Reinfelder, John (internal member), SCHWANDER, STEPHAN (outside member).

Subjects/Keywords: Biosensors; Aerosols – Measurement

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APA (6^th Edition):

Zhen, Huajun, 1. (2015). Investigation of bioaerosol characterization bias due to aerosolization and sampling. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/47620/

Chicago Manual of Style (16^th Edition):

Zhen, Huajun, 1985-. “Investigation of bioaerosol characterization bias due to aerosolization and sampling.” 2015. Doctoral Dissertation, Rutgers University. Accessed March 02, 2021. https://rucore.libraries.rutgers.edu/rutgers-lib/47620/.

MLA Handbook (7^th Edition):

Zhen, Huajun, 1985-. “Investigation of bioaerosol characterization bias due to aerosolization and sampling.” 2015. Web. 02 Mar 2021.

Vancouver:

Zhen, Huajun 1. Investigation of bioaerosol characterization bias due to aerosolization and sampling. [Internet] [Doctoral dissertation]. Rutgers University; 2015. [cited 2021 Mar 02]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47620/.

Council of Science Editors:

Zhen, Huajun 1. Investigation of bioaerosol characterization bias due to aerosolization and sampling. [Doctoral Dissertation]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47620/

Rutgers University

17. Ramos-Busot, Anjuli, 1987-. Formation of organic aerosol through cloud chemistry: insights from the OH radical oxidation of filtered rainwater.

Degree: MS, Environmental Sciences, 2012, Rutgers University

URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064165

► Organic particulate matter in the atmosphere plays an important role in climate forcing, visibility, and adverse health effects. Atmospheric organic aerosol is predominantly of secondary… (more)

▼ Organic particulate matter in the atmosphere plays an important role in climate forcing, visibility, and adverse health effects. Atmospheric organic aerosol is predominantly of secondary origin, formed in the atmosphere. Laboratory photooxidation experiments, atmospheric aerosol measurements below vs. above clouds and at increasing humidity, and modeling studies all suggest that secondary organic aerosol (SOA) forms from water-soluble gases through aqueous chemistry in clouds and wet aerosols (aqSOA). Previous laboratory experiments are simple compared to the atmospheric water media (single compound deionize water solutions), thus a more realistic approach is needed for the understanding of SOA formation through aqueous chemistry. We conducted batch photooxidation experiments with three different rainwater samples from Camden and Pinelands, NJ and hydroxyl radicals (formed from 150 μM H2O2 + UV radiation). We used rainwater (RW) as a surrogate for cloud water in these experiments. SOA precursors and products were identified by real-time Electrospray Ionization – Mass Spectrometry (ESI-MS, continuous online sampling) and by Ion Chromatography (discrete samples). Precursors were found predominantly in the positive mode, suggesting the presence of aldehydes, alcohols and organic peroxides, and products were found predominantly in the negative mode, suggesting the presence of organic acids. A decrease in the abundance of ions with the same unit mass-to-charge ratio as standards of glyoxal, methylglyoxal and glycolaldehyde and an increase in the abundance of ions associated with organic acids (e.g., oxalic and pyruvic acid) suggest that these aldehydes were present and reacting. The evidence is strongest for methylglyoxal (three RW samples). Glyoxal oxidation appears to occur in two RW samples; evidence for glycolaldehyde is not as strong. Other potential contributors to SOA formation (precursor and products) were identified based on their percentage of change and absolute change in ion abundance across the reaction. Advisors/Committee Members: Ramos-Busot, Anjuli, 1987- (author), Turpin, Barbara (chair), Carlton, Annmarie (internal member), Reinfelder, John (internal member).

Subjects/Keywords: Atmospheric aerosols – Research

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APA (6^th Edition):

Ramos-Busot, Anjuli, 1. (2012). Formation of organic aerosol through cloud chemistry: insights from the OH radical oxidation of filtered rainwater. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064165

Chicago Manual of Style (16^th Edition):

Ramos-Busot, Anjuli, 1987-. “Formation of organic aerosol through cloud chemistry: insights from the OH radical oxidation of filtered rainwater.” 2012. Masters Thesis, Rutgers University. Accessed March 02, 2021. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064165.

MLA Handbook (7^th Edition):

Ramos-Busot, Anjuli, 1987-. “Formation of organic aerosol through cloud chemistry: insights from the OH radical oxidation of filtered rainwater.” 2012. Web. 02 Mar 2021.

Vancouver:

Ramos-Busot, Anjuli 1. Formation of organic aerosol through cloud chemistry: insights from the OH radical oxidation of filtered rainwater. [Internet] [Masters thesis]. Rutgers University; 2012. [cited 2021 Mar 02]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064165.

Council of Science Editors:

Ramos-Busot, Anjuli 1. Formation of organic aerosol through cloud chemistry: insights from the OH radical oxidation of filtered rainwater. [Masters Thesis]. Rutgers University; 2012. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064165

Dalhousie University

18. Croft, Betty. Aerosol Wet Scavenging and Cloud Processing of Aerosols in a Global Climate Model.

Degree: PhD, Department of Physics & Atmospheric Science, 2011, Dalhousie University

URL: http://hdl.handle.net/10222/13241

► Clouds strongly influence three-dimensional aerosol distributions by 1) wet scavenging and subsequent deposition to the earth's surface, and 2) processing and subsequent release to the… (more)

▼ Clouds strongly influence three-dimensional aerosol distributions by 1) wet scavenging and subsequent deposition to the earth's surface, and 2) processing and subsequent release to the atmosphere by evaporation processes. In this study, physically detailed size-dependent representations of below-cloud and in-cloud scavenging for mixed phase clouds are introduced into the ECHAM5-HAM global climate model. As well, a stratiform cloud aerosol processing scheme is extended to convective clouds. Below-cloud impaction scavenging is found to contribute strongly to the global and annual mean mass deposition for sulfate (14%), black carbon (13%), particulate organic matter (10%), sea salt (23%), and dust (24%). The modeled global mean aerosol optical depth, and sea salt burden are reduced by about 15% for the more vigorous size-dependent parameterization of below-cloud scavenging by rain and snow. In stratiform clouds, aerosol mass is found to be primarily (>90%) scavenged by cloud nucleation processes for all aerosol species, except for dust (50%). Uncertainties in the representation of in-cloud scavenging processes change the predicted annual, global mean aerosol mass burdens by 20 to 30%, and change the predicted aerosol mass concentrations by up to one order of magnitude in the middle troposphere where mixed phase clouds exist. Closer agreement with observations of black carbon profiles from aircraft is found for the new in-cloud scavenging scheme. Convective and stratiform clouds contribute about equally to the global, annual mean aerosol processing, but wet deposition is primarily attributed to stratiform clouds (75%). Sulfate and carbonaceous aerosols undergo 1-3 cloud cycles before deposition. Aerosol burdens and optical depth (AOD) increase by a factor of 3-5 with the explicit representation of cloud/precipitation evaporation. Revised sea salt emissions and more vigorous in-cloud impaction scavenging reduce the AOD by a factor of three to give closer agreement with satellite retrievals. Observed marine boundary layer accumulation mode size distributions, and vertically integrated aerosol size distributions from AERONET observations are more closely approximated with the aerosol processing scheme than for the standard ECHAM5-HAM. Advisors/Committee Members: Dr. Peter Adams (external-examiner), Dr. Ted Monchesky (graduate-coordinator), Dr. Ian Folkins (thesis-reader), Dr. Glen Lesins (thesis-reader), Dr. Ulrike Lohmann and Dr. Randall Martin (thesis-supervisor), Not Applicable (ethics-approval), Yes (manuscripts), Yes (copyright-release).

Subjects/Keywords: Aerosols; climate; wet scavenging

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APA (6^th Edition):

Croft, B. (2011). Aerosol Wet Scavenging and Cloud Processing of Aerosols in a Global Climate Model. (Doctoral Dissertation). Dalhousie University. Retrieved from http://hdl.handle.net/10222/13241

Chicago Manual of Style (16^th Edition):

Croft, Betty. “Aerosol Wet Scavenging and Cloud Processing of Aerosols in a Global Climate Model.” 2011. Doctoral Dissertation, Dalhousie University. Accessed March 02, 2021. http://hdl.handle.net/10222/13241.

MLA Handbook (7^th Edition):

Croft, Betty. “Aerosol Wet Scavenging and Cloud Processing of Aerosols in a Global Climate Model.” 2011. Web. 02 Mar 2021.

Vancouver:

Croft B. Aerosol Wet Scavenging and Cloud Processing of Aerosols in a Global Climate Model. [Internet] [Doctoral dissertation]. Dalhousie University; 2011. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10222/13241.

Council of Science Editors:

Croft B. Aerosol Wet Scavenging and Cloud Processing of Aerosols in a Global Climate Model. [Doctoral Dissertation]. Dalhousie University; 2011. Available from: http://hdl.handle.net/10222/13241

University of Alberta

19. Martinez, Roberto Carlos. Study of Enhanced Deposition due to Magnetic Field Alignment of Ellipsoid Particles Using Direct Numerical Simulations.

Degree: MS, Department of Mechanical Engineering, 2012, University of Alberta

URL: https://era.library.ualberta.ca/files/vx021g61s

► A recent in vitro study demonstrated a non invasive method to enhance local deposition in a small airway by controlling the angular position of magnetic… (more)

Subjects/Keywords: Aerosols; Numerical Method; Deposition; Targeting

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APA (6^th Edition):

Martinez, R. C. (2012). Study of Enhanced Deposition due to Magnetic Field Alignment of Ellipsoid Particles Using Direct Numerical Simulations. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/vx021g61s

Chicago Manual of Style (16^th Edition):

Martinez, Roberto Carlos. “Study of Enhanced Deposition due to Magnetic Field Alignment of Ellipsoid Particles Using Direct Numerical Simulations.” 2012. Masters Thesis, University of Alberta. Accessed March 02, 2021. https://era.library.ualberta.ca/files/vx021g61s.

MLA Handbook (7^th Edition):

Martinez, Roberto Carlos. “Study of Enhanced Deposition due to Magnetic Field Alignment of Ellipsoid Particles Using Direct Numerical Simulations.” 2012. Web. 02 Mar 2021.

Vancouver:

Martinez RC. Study of Enhanced Deposition due to Magnetic Field Alignment of Ellipsoid Particles Using Direct Numerical Simulations. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2021 Mar 02]. Available from: https://era.library.ualberta.ca/files/vx021g61s.

Council of Science Editors:

Martinez RC. Study of Enhanced Deposition due to Magnetic Field Alignment of Ellipsoid Particles Using Direct Numerical Simulations. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/vx021g61s

Oregon State University

20. Ko, Lih-jong. Factors influencing the atmospheric aerosol composition at two sites in western Oregon.

Degree: MS, Atmospheric Sciences, 1992, Oregon State University

URL: http://hdl.handle.net/1957/28977

► Fine and coarse particles were collected for eight weeks during the summer of 1991, at a coastal site (Yaquina Head) and a non-industrial site (Corvallis)… (more)

▼ Fine and coarse particles were collected for eight weeks during the summer of 1991, at a coastal site (Yaquina Head) and a non-industrial site (Corvallis) in Western Oregon to characterize the aerosol composition and evaluate whether the sites are appropriate for sampling "background" marine air. Concentrations of up to 11 species (S0₄²⁻, NO₃⁻, Cl⁻, Na, Fe, Ni, Pb, Cr, Co, Sb, and CH₃SO₃H) for 95 samples were determined using four chemical analysis techniques. The influences of seasalt and soil dust were identified by analyzing concentrations of Na and Fe in the aerosol samples. Relative elemental composition in fine and coarse fractions indicated that the aerosol composition at Yaquina Head was greatly affected by seasalt. "Seasalt" enrichment factors (relative to Na) indicated that seasalt is the only source of Cl⁻ and SO₄²⁻ in coarse particles at Yaquina Head. In contrast, the seasalt influence was relatively weak at the Corvallis site. "Crustal" enrichment factors suggested that soil dust was not a major source of Na⁺, Cl⁻, or S0₄²⁻ at either site. A simple conceptual model that relies on meteorological conditions was used to identify sampling periods with long range transport from either marine or continental areas as well as local influences. This model suggested that during 61% of the experiment period the aerosols were advected from marine areas. At Yaquina Head, 52% of the sampling periods are associated with the "clean" background air (marine air with no local influences). Thus, Yaquina Head represents a useful location for collecting marine background air from the Pacific Ocean. The chemical composition of the marine background air collected at the Yaquina Head site is similar to that for other remote sites around the world. At Corvallis, "clean" marine background air can occasionally (21%) be collected even though Corvallis is located 64 km from the ocean. Advisors/Committee Members: Vong, Richard J. (advisor), Schuyler, Michael W. (committee member).

Subjects/Keywords: Aerosols – Analysis

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APA (6^th Edition):

Ko, L. (1992). Factors influencing the atmospheric aerosol composition at two sites in western Oregon. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/28977

Chicago Manual of Style (16^th Edition):

Ko, Lih-jong. “Factors influencing the atmospheric aerosol composition at two sites in western Oregon.” 1992. Masters Thesis, Oregon State University. Accessed March 02, 2021. http://hdl.handle.net/1957/28977.

MLA Handbook (7^th Edition):

Ko, Lih-jong. “Factors influencing the atmospheric aerosol composition at two sites in western Oregon.” 1992. Web. 02 Mar 2021.

Vancouver:

Ko L. Factors influencing the atmospheric aerosol composition at two sites in western Oregon. [Internet] [Masters thesis]. Oregon State University; 1992. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1957/28977.

Council of Science Editors:

Ko L. Factors influencing the atmospheric aerosol composition at two sites in western Oregon. [Masters Thesis]. Oregon State University; 1992. Available from: http://hdl.handle.net/1957/28977

Oregon State University

21. Walsh, Christopher D. A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data.

Degree: MS, Atmospheric Sciences, 2002, Oregon State University

URL: http://hdl.handle.net/1957/28779

► Cloud reflectivity is a function of cloud liquid water content and droplet number concentration. Since cloud droplets form around pre-existing aerosol particles, cloud droplet number… (more)

▼ Cloud reflectivity is a function of cloud liquid water content and droplet number concentration. Since cloud droplets form around pre-existing aerosol particles, cloud droplet number concentration depends on the availability of particles that can serve as cloud condensation nuclei. Given constant liquid water amount, increased availability of cloud condensation nuclei leads to clouds with a greater droplet number concentration, greater total droplet surface area and consequently, greater reflectivity. The change in cloud reflectivity resulting from the increased availability of condensation nuclei is known as the aerosol indirect effect. The aerosol indirect effect ranks as one of the largest sources of uncertainty in current estimates of global climate change, largely due to difficulties in measurement. Changes in cloud reflectivity resulting from the aerosol indirect effect are typically much smaller than the natural background variability observed in clouds. As a result, the modification signal is very difficult to detect against the background noise. Additionally, since atmospheric aerosols are ubiquitous, it is difficult to find polluted and nonpolluted clouds that are sufficiently alike for reasonable comparison. However, ship tracks seen in satellite images present one opportunity to study the aerosol indirect effect in relative isolation. Ship tracks are regions of enhanced reflectivity in marine stratus, resulting from the addition of aerosols from ship exhaust plumes to preexisting clouds. Ship tracks are a common feature of satellite images of the North Pacific. Since the marine atmosphere has comparatively low background aerosol concentrations, the addition of ship exhaust particles can lead to distinct increases in cloud reflectivity. Ship tracks allow for sampling of polluted and nonpolluted clouds from adjacent regions with similar solar and viewing geometry, cloud temperatures and surface properties, and consequently provide a unique opportunity to study the effects of aerosol modification of cloud reflectivity. Using satellite images of the North Pacific in July 1999, over 1000 ship tracks were identified, logged and analyzed, yielding 504 sets of radiance data matching polluted clouds with nearby nonpolluted clouds. It was expected that increasing the size of the region for selection of nonpolluted clouds would increase the variability in observed reflectivity, and make detection of the modification signal more difficult. In order to study this potential effect of domain size for selection of nonpolluted clouds on measurements of the aerosol indirect effect, three data sets were collected, using domain sizes for selection of nonpolluted clouds of 15, 50 and 100 km. Analysis of retrieved optical depth and droplet effective radius for modified and control pixels shows evidence of a 1-5% increase in visible optical depth of marine stratus following modification by addition of ship exhaust particles, but unexpectedly, shows only slight increases in uncertainty … Advisors/Committee Members: Coakley, James A. Jr (advisor).

Subjects/Keywords: Atmospheric aerosols

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APA (6^th Edition):

Walsh, C. D. (2002). A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/28779

Chicago Manual of Style (16^th Edition):

Walsh, Christopher D. “A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data.” 2002. Masters Thesis, Oregon State University. Accessed March 02, 2021. http://hdl.handle.net/1957/28779.

MLA Handbook (7^th Edition):

Walsh, Christopher D. “A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data.” 2002. Web. 02 Mar 2021.

Vancouver:

Walsh CD. A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data. [Internet] [Masters thesis]. Oregon State University; 2002. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1957/28779.

Council of Science Editors:

Walsh CD. A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data. [Masters Thesis]. Oregon State University; 2002. Available from: http://hdl.handle.net/1957/28779

University of Georgia

22. Lacke, Matthew C. Aerosols and associated precipitation patterns in Atlanta.

Degree: 2014, University of Georgia

URL: http://hdl.handle.net/10724/24193

► The role of aerosol concentrations on summer precipitation was examined in Atlanta, GA, for 2003-04. Thursday had the highest average 2.5 µm particulate matter (PM… (more)

Subjects/Keywords: Aerosols; Particulate Matter; Precipitation; Atlanta

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APA (6^th Edition):

Lacke, M. C. (2014). Aerosols and associated precipitation patterns in Atlanta. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/24193

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lacke, Matthew C. “Aerosols and associated precipitation patterns in Atlanta.” 2014. Thesis, University of Georgia. Accessed March 02, 2021. http://hdl.handle.net/10724/24193.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lacke, Matthew C. “Aerosols and associated precipitation patterns in Atlanta.” 2014. Web. 02 Mar 2021.

Vancouver:

Lacke MC. Aerosols and associated precipitation patterns in Atlanta. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10724/24193.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lacke MC. Aerosols and associated precipitation patterns in Atlanta. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/24193

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

23. Zamora, Misti E Levy. Nucleation, Transformation, and Impacts of Atmospheric Aerosols.

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

URL: http://hdl.handle.net/1969.1/187453

► Atmospheric aerosols are a key contributor to pollution, adversely affect human health, and can alter global climate. Several questions concerning atmospheric aerosols persist, including: ‘Which… (more)

▼ Atmospheric aerosols are a key contributor to pollution, adversely affect human health, and can alter global climate. Several questions concerning atmospheric aerosols persist, including: ‘Which atmospheric species are integral for aerosol formation in the atmosphere?’, ‘What happens to aerosols after emission into or formation in the atmosphere?’, ‘Does maternal exposure to aerosols during pregnancy fundamentally alter her offspring?’, and ‘Can we utilize gas phase chemistry models to further our understanding of atmospheric aerosols?’. A series of chamber, observational, and computational studies have been conducted to investigate these scientific questions. Globally, new particle formation (NPF) events account for more than 50% of the aerosols in the troposphere, but the chemical species and mechanisms responsible for NPF have yet to be fully understood. To explicate the role of organic compounds in NPF, laboratory experiments have been conducted to investigate aerosol nucleation and growth from the photochemical oxidation of biogenic and anthropogenic volatile organic compounds (VOCs). Here we show that the NPF is dependent on the VOC species and that the global pattern of NPF is likely governed by the available VOCs. A suite of instruments was deployed in Beijing to measure a comprehensive set of aerosol properties in order to elucidate the aerosol formation mechanisms and the evolution of aerosol properties. NPF consistently occurred on clean, windy days, and the high aerosol mass observed during haze events is attributable to the continuous growth from the nucleation-mode particles over multiple days to produce a high concentration of larger particles. Our results reveal that the severe haze in Beijing is likely due to the concentrated aerosol precursor gases and the large-scale meteorological conditions. Model simulations indicate that the persistent high concentrations of NO2 in Beijing and the frequent periods of high aerosol loading leads to elevated HONO levels and sustained oxidizing capacity. To determine the mechanism through which aerosols influence human health, a series of animal exposure studies have been conducted to investigate the transgenerational effects. In each experiment, Sprague-Dawley rats were continuously exposed between days 0 and 18 of gestation to controlled conditions to represent either clean (~5 µg m^-3) or polluted (~150 µg m^-3) environments. The gestation length, litter size, birth weight, and sex ratio were assessed throughout the animal exposure studies. The preliminary results indicate the development of several organs and the birth weight may be influenced by prenatal exposure to pollutants and the degree of response may also be sex dependent. Advisors/Committee Members: Zhang, Renyi (advisor), Collins, Don (committee member), Ying, Qi (committee member), Wu, Guoyao (committee member), Madronich, Sasha (committee member).

Subjects/Keywords: Aerosols; Particulate Matter; Atmospheric Chemistry

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APA (6^th Edition):

Zamora, M. E. L. (2015). Nucleation, Transformation, and Impacts of Atmospheric Aerosols. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/187453

Chicago Manual of Style (16^th Edition):

Zamora, Misti E Levy. “Nucleation, Transformation, and Impacts of Atmospheric Aerosols.” 2015. Doctoral Dissertation, Texas A&M University. Accessed March 02, 2021. http://hdl.handle.net/1969.1/187453.

MLA Handbook (7^th Edition):

Zamora, Misti E Levy. “Nucleation, Transformation, and Impacts of Atmospheric Aerosols.” 2015. Web. 02 Mar 2021.

Vancouver:

Zamora MEL. Nucleation, Transformation, and Impacts of Atmospheric Aerosols. [Internet] [Doctoral dissertation]. Texas A&M University; 2015. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1969.1/187453.

Council of Science Editors:

Zamora MEL. Nucleation, Transformation, and Impacts of Atmospheric Aerosols. [Doctoral Dissertation]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/187453

North Carolina State University

24. Gantt, Brett. Marine Organic Aerosols and Their Implication to Air Quality.

Degree: MS, Marine, Earth and Atmospheric Sciences, 2009, North Carolina State University

URL: http://www.lib.ncsu.edu/resolver/1840.16/2173

► The global marine sources of organic carbon (OC) are estimated here using a physically-based parameterization for the emission of marine isoprene and primary organic matter.… (more)

▼ The global marine sources of organic carbon (OC) are estimated here using a physically-based parameterization for the emission of marine isoprene and primary organic matter. The emission model developed in this study allowed us, for the first time, to explore the relative contributions of sub- and super-micron organic matter and phytoplankton-produced secondary organic aerosol (SOA) to the total OC fraction of marine aerosol. New laboratory measurements of isoprene production by several abundant phytoplankton species under a range of environmental conditions were scaled up, with the help of satellite products, to infer the total annual mean ocean isoprene emissions of 0.92 Tg C yr-1. The sensitivity studies using different schemes for the euphotic zone depth and ocean phytoplankton speciation produced the upper and the lower range of marine-isoprene emissions of 0.31 to 1.09 Tg C yr-1, respectively. Empirical relationships between emissions of water soluble (WSOM) and water insoluble (WIOM) organic matter (OM) and chlorophyll a concentration were used to estimate the total primary sources of oceanic sub- and super-micron OC of 1.26 and 19.01 Tg C yr-1, respectively. Using a fixed 3% mass yield for the conversion of isoprene to SOA, our emission simulations show minor (less than 0.2%) contribution of ocean produced isoprene to the total marine source of OC. However, our model calculations also indicate that over the tropical waters, marine isoprene-derived SOA could contribute over 40% of the total monthly-averaged sub-micron OC fraction of marine aerosol. The estimated contribution of ocean-isoprene SOA to hourly averaged sub-micron marine OC fluxes is even higher, reaching 100% over the vast regions of the oceans during the midday hours. As it is widely believed that sub-micron OC has the potential to influence the cloud droplet activation of marine aerosols, our findings suggest that marine sources of SOA could play critical role in modulating properties of shallow marine clouds and influencing the climate. The impact of marine isoprene emissions on summertime surface concentrations of isoprene, secondary organic aerosols (SOA), and ozone (O3) in the coastal areas of the continental United States is studied using the U.S. Environmental Protection Agency regional-scale Community Multiscale Air Quality (CMAQ) modeling system. Marine isoprene emission rates are based on the following five parameters: laboratory measurements of isoprene production from different phytoplankton species under a range of light conditions, remotely-sensed chlorophyll-a concentration ([Chl-a]), incoming solar radiation, surface wind speed, and sea-water optical properties. Model simulations show that marine isoprene emissions are sensitive to meteorology and ocean ecosystem productivity, with the highest rates simulated over the Gulf of Mexico. With the isoprene reactions included in this study, the average contribution of marine isoprene to SOA and O3 concentrations is predicted to be small, up to 0.004 Ã‚Âµg m-3 for SOA and 0.2… Advisors/Committee Members: Nicholas Meskhidze, Committee Chair (advisor), Yang Zhang, Committee Member (advisor), Daniel Kamykowski, Committee Member (advisor).

Subjects/Keywords: marine aerosols; isoprene; phytoplankton

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APA (6^th Edition):

Gantt, B. (2009). Marine Organic Aerosols and Their Implication to Air Quality. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/2173

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gantt, Brett. “Marine Organic Aerosols and Their Implication to Air Quality.” 2009. Thesis, North Carolina State University. Accessed March 02, 2021. http://www.lib.ncsu.edu/resolver/1840.16/2173.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gantt, Brett. “Marine Organic Aerosols and Their Implication to Air Quality.” 2009. Web. 02 Mar 2021.

Vancouver:

Gantt B. Marine Organic Aerosols and Their Implication to Air Quality. [Internet] [Thesis]. North Carolina State University; 2009. [cited 2021 Mar 02]. Available from: http://www.lib.ncsu.edu/resolver/1840.16/2173.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gantt B. Marine Organic Aerosols and Their Implication to Air Quality. [Thesis]. North Carolina State University; 2009. Available from: http://www.lib.ncsu.edu/resolver/1840.16/2173

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Adelaide

25. Malacari, Maximus Dominic. Systematic effects in the measurement of vertical aerosol profiles at the Pierre Auger Observatory.

Degree: 2016, University of Adelaide

URL: http://hdl.handle.net/2440/103620

► The Pierre Auger Observatory, located on the high plains of western Argentina, is the result of an international effort to measure the properties of the… (more)

Subjects/Keywords: cosmic rays; atmospheric; fluorescence; aerosols

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APA (6^th Edition):

Malacari, M. D. (2016). Systematic effects in the measurement of vertical aerosol profiles at the Pierre Auger Observatory. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/103620

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Malacari, Maximus Dominic. “Systematic effects in the measurement of vertical aerosol profiles at the Pierre Auger Observatory.” 2016. Thesis, University of Adelaide. Accessed March 02, 2021. http://hdl.handle.net/2440/103620.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Malacari, Maximus Dominic. “Systematic effects in the measurement of vertical aerosol profiles at the Pierre Auger Observatory.” 2016. Web. 02 Mar 2021.

Vancouver:

Malacari MD. Systematic effects in the measurement of vertical aerosol profiles at the Pierre Auger Observatory. [Internet] [Thesis]. University of Adelaide; 2016. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/2440/103620.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Malacari MD. Systematic effects in the measurement of vertical aerosol profiles at the Pierre Auger Observatory. [Thesis]. University of Adelaide; 2016. Available from: http://hdl.handle.net/2440/103620

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Bucknell University

26. Cook, Laura. Investigation of the Hygroscopic and Morphological Properties of Atmospheric Aerosols.

Degree: 2011, Bucknell University

URL: https://digitalcommons.bucknell.edu/masters_theses/13

► The first objective of this thesis was to examine the hygroscopic and morphological nature of various substances through the use of an Environmental Scanning Electron… (more)

Subjects/Keywords: hygroscopic; aerosols; morphology; Chemical Engineering

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APA (6^th Edition):

Cook, L. (2011). Investigation of the Hygroscopic and Morphological Properties of Atmospheric Aerosols. (Thesis). Bucknell University. Retrieved from https://digitalcommons.bucknell.edu/masters_theses/13

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cook, Laura. “Investigation of the Hygroscopic and Morphological Properties of Atmospheric Aerosols.” 2011. Thesis, Bucknell University. Accessed March 02, 2021. https://digitalcommons.bucknell.edu/masters_theses/13.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cook, Laura. “Investigation of the Hygroscopic and Morphological Properties of Atmospheric Aerosols.” 2011. Web. 02 Mar 2021.

Vancouver:

Cook L. Investigation of the Hygroscopic and Morphological Properties of Atmospheric Aerosols. [Internet] [Thesis]. Bucknell University; 2011. [cited 2021 Mar 02]. Available from: https://digitalcommons.bucknell.edu/masters_theses/13.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cook L. Investigation of the Hygroscopic and Morphological Properties of Atmospheric Aerosols. [Thesis]. Bucknell University; 2011. Available from: https://digitalcommons.bucknell.edu/masters_theses/13

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cambridge

27. Nishida, Robert Takeo. Measuring Aerosol Nanoparticles By Ultraviolet Photoionisation.

Degree: PhD, 2019, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/289387

► Aerosol particulate matter adversely affects the climate, environment and human health. Mechanistic studies have indicated that ultrafine aerosol nanoparticles, those under 100 nm in diameter,… (more)

▼ Aerosol particulate matter adversely affects the climate, environment and human health. Mechanistic studies have indicated that ultrafine aerosol nanoparticles, those under 100 nm in diameter, may have significant health impacts due to their relatively high number concentration, surface area and potential for deep penetration into the human lung. However, epidemiological evidence remains limited due to the lack of measurement networks that monitor local concentrations of ultrafine particles. Direct ultraviolet (UV) photoionisation electrically charges aerosol nanoparticles for subsequent detection by a mechanism distinct from the ion-particle collisions of conventional methods. The aim of this work is to evaluate photoionisation theory in order to understand and interpret measurements from a low-cost aerosol particle sensor. To accomplish this, theoretical equations are analysed, modelled and compared with experimental results for validation. The photoelectric yield of aerosol particles is explored in terms of particle size, concentration, material, and morphology giving insight into the interaction of light and particles. This thesis introduces the first analysis of photoionisation, recombination, convection/diffusion and transport of particles in an electric field using analytical, numerical, and computational fluid dynamics (CFD) techniques. Characteristic times and dimensionless parameters are defined to determine regimes under which the measurement system is dominated by each of the charging or transport mechanisms. The level of modelling detail required for accurate prediction of aerosol charging and capture methods is demonstrated over a range of conditions. In a continuous flow of aerosol particles, an electric field is applied to capture charge as it is photoemitted from particles and before the emitted charge and particles can recombine. This method yields a novel current measurement directly representative of photoemission. The CFD model agrees well with electrical current measurements demonstrating that the physics of the problem is suitably represented. It is demonstrated that photoemission is linearly proportional to total (mobility) surface area for a large range of sizes and concentrations of particles of self-similar material and morphology, with agglomerated silver particles having 5 × yield of agglomerated carbon from a propane flame. It is shown for the first time that agglomerated particles have a significantly higher photoelectric yield (2.6 × ) than sintered, close-packed spheres of the same mobility diameter and material, directly contradicting two of the three previous relevant studies. Close-packed spheres have less material exposed to both the photon flux and the particle's surroundings than an agglomerate of the same particle mobility diameter, thereby reducing photoelectric activity. The photoelectrically active area is defined explicitly in this work to reflect the effect of a particle's morphology; the revised definition produces good agreement with experimental results.

Subjects/Keywords: Aerosols; Photoelectric Charging; Instrumentation

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APA (6^th Edition):

Nishida, R. T. (2019). Measuring Aerosol Nanoparticles By Ultraviolet Photoionisation. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/289387

Chicago Manual of Style (16^th Edition):

Nishida, Robert Takeo. “Measuring Aerosol Nanoparticles By Ultraviolet Photoionisation.” 2019. Doctoral Dissertation, University of Cambridge. Accessed March 02, 2021. https://www.repository.cam.ac.uk/handle/1810/289387.

MLA Handbook (7^th Edition):

Nishida, Robert Takeo. “Measuring Aerosol Nanoparticles By Ultraviolet Photoionisation.” 2019. Web. 02 Mar 2021.

Vancouver:

Nishida RT. Measuring Aerosol Nanoparticles By Ultraviolet Photoionisation. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Mar 02]. Available from: https://www.repository.cam.ac.uk/handle/1810/289387.

Council of Science Editors:

Nishida RT. Measuring Aerosol Nanoparticles By Ultraviolet Photoionisation. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://www.repository.cam.ac.uk/handle/1810/289387

28. Toth, Travis. Investigating Elevated Aqua Modis Aerosol Optical Depth Retrievals Over The Mid-Latitude Southern Oceans.

Degree: MS, Atmospheric Sciences, 2012, University of North Dakota

URL: https://commons.und.edu/theses/1383

► A band of elevated aerosol optical depth (AOD) over the mid-latitude Southern Oceans has been identified in some passive satellite-based aerosol datasets such as… (more)

Subjects/Keywords: Aerosols; Clouds; Satellite remote sensing

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APA (6^th Edition):

Toth, T. (2012). Investigating Elevated Aqua Modis Aerosol Optical Depth Retrievals Over The Mid-Latitude Southern Oceans. (Masters Thesis). University of North Dakota. Retrieved from https://commons.und.edu/theses/1383

Chicago Manual of Style (16^th Edition):

Toth, Travis. “Investigating Elevated Aqua Modis Aerosol Optical Depth Retrievals Over The Mid-Latitude Southern Oceans.” 2012. Masters Thesis, University of North Dakota. Accessed March 02, 2021. https://commons.und.edu/theses/1383.

MLA Handbook (7^th Edition):

Toth, Travis. “Investigating Elevated Aqua Modis Aerosol Optical Depth Retrievals Over The Mid-Latitude Southern Oceans.” 2012. Web. 02 Mar 2021.

Vancouver:

Toth T. Investigating Elevated Aqua Modis Aerosol Optical Depth Retrievals Over The Mid-Latitude Southern Oceans. [Internet] [Masters thesis]. University of North Dakota; 2012. [cited 2021 Mar 02]. Available from: https://commons.und.edu/theses/1383.

Council of Science Editors:

Toth T. Investigating Elevated Aqua Modis Aerosol Optical Depth Retrievals Over The Mid-Latitude Southern Oceans. [Masters Thesis]. University of North Dakota; 2012. Available from: https://commons.und.edu/theses/1383

29. Zhang, Lu. Design and numerical simulation of the real-time particle charge and size analyser.

Degree: PhD, 2010, University of South Wales

URL: https://pure.southwales.ac.uk/en/studentthesis/design-and-numerical-simulation-of-the-realtime-particle-charge-and-size-analyser(fcbc8f66-9758-4c24-abbd-ccc14a28307f).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521624

► The electrostatic charge and size distribution of aerosol particles play a very important role in many industrial applications. Due to the complexity and the probabilistic… (more)

▼ The electrostatic charge and size distribution of aerosol particles play a very important role in many industrial applications. Due to the complexity and the probabilistic nature of the different charging mechanisms often acting simultaneously, it is difficult to theoretically predict the charge distribution of aerosol particles or even estimate the relative effect of the different mechanisms. Therefore, it is necessary to measure the size and also the bipolar charge distribution on aerosol particles. The main aim of this research project was to design, implement and simulate a signal processing system for novel, fully functional measurement instrument capable of simultaneously measuring in real time the bipolar charge and size distribution of medical aerosols. The Particle Size and Charge Analyser (PSCA), investigated in this thesis, uses Phase Doppler Anemometry (PDA) technique. The PDA system was used to track the motion of charged particles in the presence of an electric field. By solving the equation of particle motion in a viscous medium combined with the simultaneous measurement of its size and velocity, the magnitude as well as the polarity of the particle charge can be obtained. Different signal processing systems in different excitation fields have been designed and implemented. These systems include: velocity estimation system using spectral analysis in DC excitation field, velocity estimation system based on Phase Locked Loop (PLL) technique working in DC as well as sine-wave excitation fields, velocity estimation system based on Quadrature Demodulation (QD) technique under sine-wave excitation method, velocity estimation system using spectral analysis in square-wave excitation field and phase shift estimation based on Hilbert transformation and correlation technique in both sine-wave and square-wave excitation fields. The performances of these systems were evaluated using Monte Carlo (MC) simulations obtained from the synthesized Doppler burst signals generated from the mathematical models implemented in MATLAB. The synthesized Doppler Burst Signal (DBS) was subsequently corrupted with the added Gaussian noise. Cross validation of the results was performed using hardware signal processing system employing Arbitrary Waveform Generator and also NASA simulator to further confirm the validity of the estimation. It was concluded that the velocity estimation system based on spectral analysis in square-wave excitation field offers the best overall performance in terms of the working range, noise sensitivity and particle capture efficiency. The main reasons for the superiority of the square-wave excitation over the sine-wave excitation system are as follows: Firstly, in the square-wave field particles attain higher velocities and greater amplitudes of displacement, which increases their probability of crossing the measurement volume from various injection points. Secondly, the sine-wave excitation requires that the particle residence time in the measurement volume is at least equal to one period of the…

Subjects/Keywords: 681.761; Aerosols

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APA (6^th Edition):

Zhang, L. (2010). Design and numerical simulation of the real-time particle charge and size analyser. (Doctoral Dissertation). University of South Wales. Retrieved from https://pure.southwales.ac.uk/en/studentthesis/design-and-numerical-simulation-of-the-realtime-particle-charge-and-size-analyser(fcbc8f66-9758-4c24-abbd-ccc14a28307f).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521624

Chicago Manual of Style (16^th Edition):

Zhang, Lu. “Design and numerical simulation of the real-time particle charge and size analyser.” 2010. Doctoral Dissertation, University of South Wales. Accessed March 02, 2021. https://pure.southwales.ac.uk/en/studentthesis/design-and-numerical-simulation-of-the-realtime-particle-charge-and-size-analyser(fcbc8f66-9758-4c24-abbd-ccc14a28307f).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521624.

MLA Handbook (7^th Edition):

Zhang, Lu. “Design and numerical simulation of the real-time particle charge and size analyser.” 2010. Web. 02 Mar 2021.

Vancouver:

Zhang L. Design and numerical simulation of the real-time particle charge and size analyser. [Internet] [Doctoral dissertation]. University of South Wales; 2010. [cited 2021 Mar 02]. Available from: https://pure.southwales.ac.uk/en/studentthesis/design-and-numerical-simulation-of-the-realtime-particle-charge-and-size-analyser(fcbc8f66-9758-4c24-abbd-ccc14a28307f).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521624.

Council of Science Editors:

Zhang L. Design and numerical simulation of the real-time particle charge and size analyser. [Doctoral Dissertation]. University of South Wales; 2010. Available from: https://pure.southwales.ac.uk/en/studentthesis/design-and-numerical-simulation-of-the-realtime-particle-charge-and-size-analyser(fcbc8f66-9758-4c24-abbd-ccc14a28307f).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521624

Hong Kong University of Science and Technology

30. Choi, Man Yee. Hygroscopicity and phase transition of atmospheric aerosols.

Degree: 2004, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-1887 ; https://doi.org/10.14711/thesis-b818126 ; http://repository.ust.hk/ir/bitstream/1783.1-1887/1/th_redirect.html

► Hygroscopicity, condensational growth and deliquescence are important characteristics of atmospheric aerosols. Apart from the inorganic fraction of atmospheric aerosols, water-soluble organic compounds have recently received… (more)

▼ Hygroscopicity, condensational growth and deliquescence are important characteristics of atmospheric aerosols. Apart from the inorganic fraction of atmospheric aerosols, water-soluble organic compounds have recently received much attention because of their ability to absorb water and affect the radiation balance and the climate. Partly due to their relatively high volatility, thermodynamic data on water-soluble organic compounds are scarce. In this thesis, a scanning electrodynamic balance (SEDB), based on a well-characterized increase of relative humidity (RH) in the vicinity of a levitated particle in an electrodynamic balance, was applied to measure the water activity of binary and ternary mixed aerosols containing inorganic and organic solutes. The SEDB enables the measurement of water activity data of evaporating droplets within an hour, which can potentially be used to measure volatile species. We first applied the SEDB to study the hygroscopicity of non-volatile aerosols containing sodium and calcium salts. We then confirmed that the SEDB can be used to study the semi-volatile organic species with vapor pressures up to 1E-4 mmHg. Using the SEDB, the hygroscopicity, the crystallization relative humidity (CRH) and the deliquescence relative humidity (DRH) of aqueous solutions of maleic acid and glutaric acid were measured. The effects of glycerol, succinic acid, malonic acid, citric acid and glutaric acid on the water cycles (water activities during particle evaporation and growth), CRH and DRH of sodium chloride and ammonium sulfate were also examined. Among the hygroscopic characteristics of atmospheric aerosols, efflorescence of supersaturated droplets to form solid (or partially solid) particles is least understood. At high supersaturation, the interaction of water with solute is expected to be very important. Hence, the knowledge of the state of water molecules, particularly the amounts of solvated water and free water in aqueous droplets, is valuable in understanding the hydration properties of atmospheric aerosols. A novel technique combining the use of an electrodynamic balance (EDB) and a fluorescence dye, 8- hydroxy1-1,3,6-pyrenetrisulfonate (pyranine), was used to study the state of the water molecules in single levitated aqueous droplets from subsaturation to supersaturation concentrations. The steady-state fluorescence spectra of sucrose, glucose, NaC1, MgSO4 and Mg(NO3)2 solutions doped with 100 ppm pyranine were measured. The fluorescence emission of pyranine is sensitive to the proton transfer capacity of its microenvironment. When excited by radiation at around 345 nm, pyranine fluoresces and the spectrum consists of two peaks, one at about 440 nm and the other at about 510 nm, which correspond to the presence of solvated water (or the absence of free water) and free water, respectively. The fluorescence peak intensity ratios of the 440 nm peak to the 510 nm peak and the hygroscopic measurements were used to calculate the amounts of solvated and free water in the droplets as a function of…

Subjects/Keywords: Atmospheric aerosols

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APA (6^th Edition):

Choi, M. Y. (2004). Hygroscopicity and phase transition of atmospheric aerosols. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-1887 ; https://doi.org/10.14711/thesis-b818126 ; http://repository.ust.hk/ir/bitstream/1783.1-1887/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Choi, Man Yee. “Hygroscopicity and phase transition of atmospheric aerosols.” 2004. Thesis, Hong Kong University of Science and Technology. Accessed March 02, 2021. http://repository.ust.hk/ir/Record/1783.1-1887 ; https://doi.org/10.14711/thesis-b818126 ; http://repository.ust.hk/ir/bitstream/1783.1-1887/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Choi, Man Yee. “Hygroscopicity and phase transition of atmospheric aerosols.” 2004. Web. 02 Mar 2021.

Vancouver:

Choi MY. Hygroscopicity and phase transition of atmospheric aerosols. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2004. [cited 2021 Mar 02]. Available from: http://repository.ust.hk/ir/Record/1783.1-1887 ; https://doi.org/10.14711/thesis-b818126 ; http://repository.ust.hk/ir/bitstream/1783.1-1887/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Choi MY. Hygroscopicity and phase transition of atmospheric aerosols. [Thesis]. Hong Kong University of Science and Technology; 2004. Available from: http://repository.ust.hk/ir/Record/1783.1-1887 ; https://doi.org/10.14711/thesis-b818126 ; http://repository.ust.hk/ir/bitstream/1783.1-1887/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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