HR: 11:20h
AN: A22B-05    [Abstracts]
TI: Air Quality over Urban Areas Using Combined Satellite and Ground Measurements
AU: * Gupta, P
EM: gupta@nsstc.uah.edu
AF: Department of Atmospheric Sciences, The University of Alabama in Huntsville, 320 Sparkman Drive NSSTC-3065, Huntsville, AL 35805 United States
AB: Study of urban air quality and anthropogenic aerosols have gained significant attention of scientist, government and environmental agencies over the last few years due to its adverse effects on human health, global biota, climate and economy. Anthropogenic particulate matter (PM or aerosols), one of the major pollutants affecting the air quality in urban areas of the world, vary in chemical composition in different parts of the world. New generation remote sensing satellites have demonstrated capabilities for monitoring global pollution with very high spatial and temporal resolutions. However, further studies are needed to provide a comprehensive picture of aerosols and their effects. Present knowledge on chemical composition of aerosols is not sufficient to estimate their effects on health and climate change. In this study, relationship between satellite measured aerosol properties and mass of different types of aerosols measured from ground based instruments is explored. Aerosol properties from MODIS (MODerate resolution Imaging Spectroradiometer) on board Terra and Aqua satellites and chemical composition of aerosols from ground based IMPROVE network are used. This study will be conducted over several IMPROVE stations in United States and broad classification of aerosol types based on their chemical composition will be performed. Primary results from a case study conducted over a IMPROVE station in the Alabama, USA shows that more than 90% of aerosol optical thickness is due to sub micron size particles. The chemical composition information from ground based measurements well match with aerosol models used in MODIS retrievals. Overall sulfate aerosols are found most dominant with almost 50% contribution in total aerosols followed by organic carbon, nitrates, and dust aerosols.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0478 Pollution: urban, regional and global (0345, 4251)
DE: 0480 Remote sensing
DE: 4251 Marine pollution (0345, 0478)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005