Satellite observations of unusual dust event over North-East India and its relation with meteorological conditions |
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| Authors: | Anu Rani Sharma Shailesh Kumar Kharol KVS Badarinath |
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| Institution: | 1. Indian Institute of Remote Sensing, Dehradun, Uttarakhand, India;2. Aryabhatta Research Institute of Observational Sciences, Nainital, Uttarakhand, India;3. Laboratoire d''Aérologie, CNRS and Université Paul Sabatier, Toulouse, France;1. Department of Environment and Sustainability, Institute of Minerals & Materials Technology (CSIR), Bhubaneswar, India;2. International Centre for Integrated Mountain Development (ICIMOD), Kathmandu, Nepal;3. Atmospheric Sciences Division, Space Application Centre (ISRO), Ahmedabad, India;4. Space and Atmospheric Sciences Division, Physical Research Laboratory, Ahmedabad, India |
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| Abstract: | An unusual intense dust storm occurred over North-East region of India on 17 March 2009, which was analyzed using multi-satellite data sets. Terra MODIS AOD550 showed high values on 17 March 2009 with low values of Angstrom exponent (α), suggesting coarse mode particle loading in the atmosphere. NCEP temperature and relative humidity anomalies showed high temperature and low humidity during March 2009. Dry weather conditions due to deficit rainfall during January–March 2009 and higher winds resulted in unusual dust storm over the region. Satellite observations of aerosol optical depth variations suggested increased aerosol loading in March 2009 due to dust storm. |
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