8 December 2006 Characterization of atmospheric aerosols over urban area using ground-based measurements and satellite data: a case study over Hyderabad, India
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Abstract
Atmospheric aerosols are among the most variable components of the Earth's atmospheric environment important in general circulation models related to climate change. The presence of aerosols in the lower atmosphere affects primarily the incoming solar radiation by scattering and absorbing the solar radiation. Aerosols have significant impact on climate through their influence on cloud formation and on minor species concentrations. Studies on Aerosols with respect to temporal and spatial variations in different environments gains importance. Synchronous measurement of Aerosol Optical Depth (AOD), solar irradiance in different wavelength bands, aerosol particle size distribution measurements and Black Carbon (BC) aerosol mass concentration were made at urban area of Hyderabad, India as a part of ISRO-GBP initiative. The Julian day variation of AOD, Particulate Matter (PM) and BC showed higher values on certain days suggesting additional sources of aerosols over urban area of Hyderabad. In order to understand the additional sources of aerosol, daily satellite data sets of MODIS/DMSP-OLS were processed for forest fires over the Indian region. The higher values in black carbon aerosol mass concentration and aerosol optical depth correlated well with forest fires over the region. Radiative forcing estimated from synchronous measurements of AOD and ground reaching broadband solar irradiance. Ground AOD measurements correlated well with MODIS derived AOD at different wavelengths. Results are discussed in the paper.
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Shailesh Kumar Kharol, Shailesh Kumar Kharol, K. V. S. Badarinath, K. V. S. Badarinath, } "Characterization of atmospheric aerosols over urban area using ground-based measurements and satellite data: a case study over Hyderabad, India", Proc. SPIE 6408, Remote Sensing of the Atmosphere and Clouds, 640810 (8 December 2006); doi: 10.1117/12.697867; https://doi.org/10.1117/12.697867
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