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Impact of electrified and non-electrified clouds on the inter-seasonal characteristics of surface-based precipitation
Journal of Earth System Science ( IF 1.9 ) Pub Date : 2020-08-04 , DOI: 10.1007/s12040-020-01432-x
Kaustav Chakravarty , P Murugavel , Angel A Christy , V Singh , G Pandithurai

A multi-sensor analysis of the characteristics of electrified and non-electrified clouds along with their impact on the surface-based raindrop size distribution (DSD) during the inter-seasonal phases of Indian summer monsoon over a heavy precipitation region of Western Ghat (WG) has been highlighted in the present paper. The analysis reveals that during the pre-monsoon (monsoon) months, raindrops of larger diameter dominate the rainfall evolving from the non-electrified (electrified) clouds compared to the rainfall evolving from the electrified (non-electrified) ones. The complex relationship of the convective rainfall with highly charged electrified clouds forces the smaller drops aloft and thereby allowing the larger drops to precipitate locally during the pre-monsoon season. While for the monsoon months, as most of the rainfall originates from the deep clouds, the chances of drops to break-up/evaporate is comparatively less for the precipitation evolving from electrified clouds with charged droplets with respect to the non-electrified ones. Hence, drops of larger diameter dominate the monsoon rainfall associated with lightning. Correspondingly, the paper also highlighted a case study of the changing morphology of the vertical structure of clouds and surface precipitation with the evolution of lightning during various stages of a typical rainfall event over the orographic region of WG.

中文翻译:

带电和不带电云对地表降水季节间特征的影响

多传感器分析在西高止山脉的强降水区上印度夏季风的季节间阶段,带电和不带电的云的特征及其对基于地面的雨滴尺寸分布(DSD)的影响)已在本文中突出显示。分析表明,在季风前(季风)月份,与非电气化(非电气化)云形成的降雨相比,直径更大的雨滴主导着非电气化(电气化)云的降雨。对流降雨与带高电荷的带电云之间的复杂关系迫使较小的液滴在高空运动,从而使较大的液滴在季风前季节局部沉淀。虽然在季风月份 由于大多数降雨来自深层云,因此与带电液滴相比,带电液滴带电的云所产生的降水相对于非带电液滴而言,液滴破裂/蒸发的机会相对较少。因此,直径较大的水滴主导着与闪电有关的季风降雨。相应地,本文还重点介绍了一个案例研究,即在WG地形区域内典型降雨事件的各个阶段,云的垂直结构形态变化和地表降水随闪电的演化而变化。直径较大的水滴主导着与闪电有关的季风降雨。相应地,本文还着重介绍了一个案例研究,即在WG地形区域内典型降雨事件的各个阶段,云的垂直结构形态变化和地表降水随闪电的演化而变化。直径较大的水滴主导着与闪电有关的季风降雨。相应地,本文还着重介绍了一个案例研究,即在WG地形区域内典型降雨事件的各个阶段,云的垂直结构形态变化和地表降水随闪电的演化而变化。
更新日期:2020-08-04
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