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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.

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Showing 1 to 20 of 21 for “"Aerosol Optical Depth (AOD)"”.

  1. UNDERSTANDING MISSING DATA IN REAL-TIME POLLUTION MONITORING SYSTEM IN CHINA

    Han, CongyanCornell University2019

    … level of air pollution measured by the Aerosol Optical Depth (AOD) has a negative relationship with the frequency of data missing. This relation- ship is weaker in dirty cities measured by the average AOD during the sample period and is reversed in very dirty cities.

    cornell Repository record

  2. Analysis of Aerosol Optical Depth for South Korea

    Mojumder, OhidulUniversity of Nevada, Reno2020

    … air pollution levels. This research analyzes aerosol optical depth (AOD), a measurement of aerosols present in the atmosphere, for South Korea, taking special interests in urban factors and topography. Through analyses using Matlab, a correlation between the AOD, urban factors, and topography …

    unr Repository record

  3. Development of a multispectral albedometer and deployment on an unmanned aircraft for evaluating satellite retrieved surface reflectance over Nevada's Black Rock Desert

    Boehmler, Jayne M.2018

    Accurate atmospheric aerosol characteristics derived from satellite measurements areneeded over a variety of land surfaces. Inhomogeneous and bright surface reflectanceacross California and Nevada may be a contributing factor in the discrepancies observedbetween ground based and satellite-retrieved …

    unr Repository record

  4. Remote measurement of aerosol optical properties using the NOAA POES AVHRR during ACE-1, TARFOX and ACE-2

    Smith, Peter J.Monterey, California. Naval Postgraduate School1998

    … Phase functions are parameterized using an aerosol distribution model and the ratio of radiance values measured in channels 1 and 2 of the AVHRR. Automated cloud screening and sun glint removal is included. Retrieved satellite aerosol optical depth (AOD) is compared to surface measured …

    nps Repository record

  5. Investigating Elevated Aqua Modis Aerosol Optical Depth Retrievals Over The Mid-Latitude Southern Oceans

    Toth, Travis

    <p>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 Moderate Resolution Imaging SpectroRadiometer (MODIS) and Multi-angle Imaging SpectroRadiometer (MISR) products. In this study, Aqua …

    nodak Repository record

  6. Determining The Effectiveness Of Satellite Remote Sensing Products To Quantify Aerosol Pollution In The Semi-Arid Western U.S.

    Loria-Salazar, Sandra M.2018

    … investigations have found a negative impact of aerosol pollution on human health by studying the association of human health endpoints and PM2.5 (particulate matter with an aerodynamic diameter smaller than 2.5 μm) concentrations. Satellite-derived PM2.5 estimates are relevant to improve the …

    unr Repository record

  7. Increases and decreases in the fine mode fraction of aerosol optical depth with increasing relative humidity

    Bose, SuchismitaUniversity of Illinois at Urbana-Champaign2012

    … (Multi-Angle Imaging SpectroRadiometer) to the Aerosol Optical Depth (AOD) is correlated to the AERONET (Aerosol Robotic Network) fine mode fraction of AOD. According to this thesis the contribution of particles having radius <= 0.7 um to the measured AOD can either increase or decrease with …

    uiuc Repository record

  8. Integration of Satellite Remote Sensing and Ground-based Measurement for Modelling the Spatiotemporal Distribution of Fine Particulate Matter at a Regional Scale

    Tian, Jie2009

    … remotely-sensed data and in situ measurement. Aerosol optical depth (AOD) data from the Moderate Resolution Imaging Spectroradiometer (MODIS) is analyzed to estimate fine particulate matter (PM2.5) concentrations as the target air pollutant. The spatial-temporal distribution of columnar aerosol …

    queens Repository record

  9. Evaluating The Impact Of Above-Cloud Aerosols On Cloud Optical Depth Retrievals From Modis

    Alfaro, Ricardo

    … Imaging Spectroradiometer (MODIS) cloud optical depth (COD) retrievals (visible and shortwave infrared), the impacts of above-cloud absorbing aerosols on the standard COD retrievals are evaluated. For fine-mode aerosol particles, aerosol optical depth (AOD) values diminish sharply from …

    nodak Repository record

  10. Effects of Aerosol on Cloud Water Path: Statistical Method a Potential Source for Divergence in Observation-based Correlative Studies

    Sy Savane, OusmaneThe Graduate School and University Center of The City University of New York2016

    … between correlative studies involving aerosol and cloud proxies has been thought of in the past as the results of varying physical mechanisms. Although models have supported the existence of variable correlations, from an observational standpoint it is difficult to attribute with …

    cuny-grad Repository record

  11. Characterization of the physical, chemical, and optical properties of atmospheric aerosol particles in New Hampshire

    Slater, John Frederick

    <p>Tropospheric aerosol particles directly affect the radiative budget of the Earth, and degrade visibility, by scattering and absorbing short-wavelength solar radiation. However, the radiative effect of aerosols is highly uncertain due to the non-uniform spatial distribution of the particles over …

    unh-thes Repository record

  12. A Study of Asian Dust Events Using Surface, Satellite, and Aircraft Measurements During Intex-B

    Obrecht, Rebecca L.

    … Ocean. This study documents the physical and optical properties of Asian dust, as well as its strength and evolution from its source near the Gobi desert to its sink in North America, during INTEX-B using surface, satellite and DC-8 aircraft measurements.</p> <p>A total of 11 dust events have …

    nodak Repository record

  13. Employment of Multi-Source Satellite-Based Observations in Air Quality Modeling over Asia

    Park, JincheolUniversity of Houston2024

    … to improve model accuracy in simulating aerosol optical depth (AOD), using nitrogen dioxide (NO2) columns and AOD data from the TROPOspheric Monitoring Instrument (TROPOMI), Advanced Himawari Imager (AHI), and Geostationary Ocean Color Imager (GOCI). While the model initially …

    houston Repository record

  14. Aerosol Optical Depth And Its Relationship To Radar Derived Precipitation In Mali, West Africa

    Keith, David Benham

    … is to determine if a relationship exists between Aerosol Optical Depth (AOD) and radar-derived precipitation in Mali, a country located in West Africa. Precipitation parameters derived from 2006, 2007 and 2008 C-band radar measurements are compared against Noon to 2 p.m. averaged AOD measurements. …

    nodak Repository record

  15. Unraveling the Mystery of Extreme trans-Atlantic African Dust Events: Insights from Case Studies

    Harr, BrianUniversity of Kansas2023

    … a relatively short period and an extremely high AOD over the tropical North Atlantic for at least three days. The high dust loading over the tropical North Atlantic is associated with atmospheric circulation extremes that are similar to the June 2020 “Godzilla” dust event. Both the African …

    ku Repository record

  16. Spatio-temporal variability of aerosols in the tropics relationship with atmospheric and oceanic environments

    Zuluaga-Arias, Manuel D.Georgia Institute of Technology2011

    … radiation budget is directly influenced by aerosols through the absorption of solar radiation and subsequent heating of the atmosphere. Aerosols modulate the hydrological cycle indirectly by modifying cloud properties, precipitation and ocean heat storage. In addition, polluting aerosols …

    gatech Repository record

  17. Machine Learning & Big Data Analyses for Wildfire & Air Pollution Incorporating GIS & Google Earth Engine

    Saim, Abdullah Al2023

    … to produce 1-km resolution images and retrieves Aerosol Optical Depth (AOD) at 470 nm and 550 nm wavelengths. These retrieved AOD values from MODIS are validated using the ground-based sun photometers Aerosol Robotic Network (AERONET), and the uncertainty is checked using the Mean Absolute Error …

    arkansas Repository record

  18. Improving Our Understanding of Atmospheric Aerosols and Their Climate Effects: Implications for Satellite Retrievals and GCM Simulations

    Li, Jing2011

    … on improving our understanding of atmospheric aerosols using both observational data and model simulations. EOF analysis of Aerosol Index (AI) product from Total Ozone Mapping Spectrometer (TOMS) and Ozone Monitoring Instrument (OMI) reveals global distribution of absorbing aerosols, with major …

    columbia-diss Repository record

  19. Satellite constraints on surface concentrations of particulate matter

    Ford Hotmann, Bonne, author, Heald, Colette L., advisor, Kreidenweis, Sonia M., committee member, Peel, Jennifer L., committee member, Collett, Jeffrey L., committee memberColorado State University. Libraries2015

    … relationship between satellite-observed aerosol optical depth (AOD) and surface concentrations. This dissertation explores how satellite observations can be used in conjunction with a chemical transport model (GEOS-Chem) to better understand this relationship. First, we investigate the …

    colostate Repository record

  20. Comparisons of an aerosol transport model with a 4-year analysis of summer aerosol optical depth retrievals over the Canadian Arctic

    Hesaraki, SarehUniversité de Sherbrooke2016

    … compare des épaisseurs optiques d’aérosols (AOD) à 5 stations arctiques d’AEROCAN (AERONET), obtenues d’une part à l’aide de l’algorithme d'inversion de Dubovik appliqué à des mesures in situ, et d’autre part du modèle de transport chimique (GEOS-Chem : Goddard Earth Observing Système …

    sherbrooke Repository record

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