On the linkage between changes in cloud cover and precipitation extremes over Central India |
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| Institution: | 1. Environmental Sciences and Biomedical Metrology Division, CSIR-National Physical Laboratory, New Delhi, -110012, India.;2. Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Ghaziabad, Uttar Pradesh 201002, India;3. School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, -110067, India;1. Indian Institute of Tropical Meteorology, Pune, India;2. Savitribai Phule Pune University, Pune, India;3. Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, India;1. Indian Institute of Tropical Meteorology (Ministry of Earth Science), Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India;2. Department of Atmospheric and Space Science, Savitribai Phule Pune University, Ganeshkhind Road, Pune 411007, Maharashtra, India;3. International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam 686560, Kerala, India;1. Indian Institute of Tropical Meteorology (IITM), Dr. Homi Bhabha Road, Pashan, Pune 411008, India;2. Atmospheric and Space Science Division, Savtribai Phule Pune University, Pune 411007, India |
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| Abstract: | In this study, linkage between changing characteristics of precipitation extremes and cloud covers over Central India is explored during summer monsoon period using Satellite data (1998–2015). This is a first attempt to relate the changes in cloud cover to the changes in precipitation extremes. Non-rainy cirrus clouds are excluded from this study. Results show that heavy rainfall (≥ 60 mm/day) is associated with cold cloud tops (Tb≤220 K) while moderate rainfall (<60 mm/day and ≥20 mm) occurs mostly with middle clouds (Tb>220 K and ≤245 K). Low level clouds (Tb> 245 K) are responsible for light rainfall (<20 mm/day). Increases in top 20%, 10%, 5% and 1% heavy precipitation relate well with the increases in very deep convective, deep convective and convective cloud cover. Among these relations, increase in top 5% heavy precipitation relates best with increase in very deep convective cloud cover. Decrease in bottom 30% low precipitation relates with decrease in low level cloud cover. The results reported in this study fit into the framework of how weather extremes respond to climate change. |
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| Keywords: | Climate change Flood Drought Cloud cover Convection Precipitation |
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