Effect of winds on SO2 and SPM concentrations in Delhi |
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| Affiliation: | 1. Aerosol & Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur, 515 003 Andhra Pradesh, India;2. Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, 695 022 Kerala, India;1. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;4. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China |
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| Abstract: | A study of concentrations of sulfur dioxide (SO2) and suspended particulate matter (SPM) has been performed in Delhi. The monthly and seasonal variations of concentrations and winds are analyzed. The monthly mean SO2 concentrations were in the range of 16.15–34.44 μg m−3 and showed regular seasonal variations with the highest concentrations in winter and lowest in monsoon season. On the other hand, the monthly mean SPM concentrations reached the highest (465.68 μg m−3) in November and the lowest (150.07 μg m−3) in August. It was observed that high SO2 concentrations were generally associated with the wind blowing from WNW–NW directions, and the high SPM concentrations were usually related to the wind blowing from W–NW directions. |
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