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Variation in atmospheric aerosol properties over a tropical urban region associated with biomass-burning episodes - a study using satellite data and ground-based measurements

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The change in aerosol properties and ground-reaching solar irradiance in different spectral bands associated with an intense biomass-burning episode has been examined in the present study. Synchronous ground-based measurements on aerosol optical depth (AOD), erythemal ultraviolet radiation (UVery), solar irradiance and light detecting and ranging (LIDAR) observations of aerosol backscatter were carried out in the urban region of Hyderabad, India. Air-mass back-trajectory analysis has been carried out to infer long-range transport of pollutants over the urban environment of Hyderabad. Ground-measured AOD showed ∼50% increase on 3 March 2009 compared to 2 March 2009, along with ∼13% and ∼31% increases in Angstrom's parameter (α) and turbidity coefficient (). UVery and global solar irradiance showed ∼24% and ∼10% reduction, respectively, on a turbid day (3 March 2009) compared to a normal day (2 March 2009). The Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) AOD550 also showed higher values associated with long-range transport of aerosols from biomass burning over the region.
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Document Type: Research Article

Affiliations: Atmospheric Science Section, National Remote Sensing Centre, Department of Space, Government of India, Balanagar, Hyderabad-500 625, India

Publication date: 2011-04-01

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