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Title of Journal: Meteorol Atmos Phys

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Abbravation: Meteorology and Atmospheric Physics

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Springer Vienna

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DOI

10.1002/bip.360290413

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1436-5065

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Seasonal variation of lightning activity over the

Authors: M R Ranalkar H S Chaudhari
Publish Date: 2009/04/24
Volume: 104, Issue: 1-2, Pages: 125-134
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Abstract

The seasonal variation of lightning flash activity over the Indian subcontinent 0°N–35°N and 60°E–100°E is studied using the quality checked monthly lightning flash data obtained from lightning imaging sensor on board the Tropical Rainfall Measuring Mission satellite This paper presents results of spatiotemporal variability of lightning activity over the Indian subcontinent The study of seasonal total lightning flashes indicates that the lightning flash density values are in qualitative agreement with the convective activity observed over this region Maximum seasonal total flash counts are observed during the monsoon season The propagation of the intertropical convergence zone over this region is also confirmed Synoptic conditions responsible for variation of lightning activity are also investigated with the help of an observed dataset The mean monthly flash counts show a peak in the month of May which is the month of maximum temperatures over this region Maximum flash density 402 km−2 season−1 is observed during the premonsoon season at 252°N/916°E and the annual maximum flash density of 282 km−2 year−1 is observed at 332°N/746°E The study of the interannual variability of flash counts exhibits bimodal nature with the first maximum in April/May and second maximum in August/SeptemberThe authors are thankful to Dr AVM Ajit Tyagi Director General of Meteorology DGM India Meteorological Department New Delhi and Prof B N Goswami Director Indian Institute of Tropical Meteorology IITM Pune Authors also thank Dr R Krishnan IITM Dr R D Vashistha Dy DGM Surface Instruments IMD Pune and Dr Suryachandra Rao IITM for providing the encouragement to carry out this work Critical comments by two anonymous reviewers are also acknowledged The authors are also thankful to NASA Marshall Space Flight Centre Huntsville USA for LIS data availability on CDs

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  11. Investigation of the impact in variation of secondary radioclimatic variables on microwave at the lower atmosphere
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