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Variability of lightning, convective rain and solar activity study over South/Southeast Asia during ENSO episode for the period of 1998-2010

Siingh, D and Dharmaraj, T and Ramesh Kumar, P and Singh, R and Kumar, S and Chinthalu, GR and Patil, MN and Singh, RP (2017) Variability of lightning, convective rain and solar activity study over South/Southeast Asia during ENSO episode for the period of 1998-2010. Journal of Indian Geophysical Union, 21 (5). pp. 401-414.

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Abstract

Abstract Analysis of monthly mean data of lightning and convective rain for the region 8° N - 35° N, 60° E - 120° E and for the period 1998-2010 show that lightning and convective rain are not significantly influenced by solar parameters such as sunspot number, total solar irradiance (TSI) and solar radio flux whereas CAPE anomaly and temperature anomaly have significant impact on the total lightning flash rate and convective rain during ENSO periods. Further no significant relation between cosmic ray flux and total lightning flash rate during La Niña period is obtained. On the other hand, for the El Niño period and for the total period, we get statistically some significant negative correlation between cosmic ray flux and total lightning flash rate. However, it is not possible to make any comment on the general relation between cosmic ray flux and total lightning flash rate due to contaminating global effects, regional effects and cloud microphysics. In the monthly variation of the parameters, temperature anomaly can be used as a proxy for the total lightning flash rate for the region under consideration. Most of the variation in ozone during the ENSO period is due to lightning. In the region considered here, role of aerosols in producing lightning and rainfall is quite comparable during La Niña period. On the other hand, aerosols contribute more towards production of lightning than producing rain during El Niño due to changes in cloud microphysics and cloud electrification.

Item Type: Article
Additional Information: Copyright of this article belongs to Indian Geophysical Union
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 13 Aug 2018 09:28
Last Modified: 13 Aug 2018 09:28
URI: http://moeseprints.incois.gov.in/id/eprint/4546

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