气候变化领域集成服务门户(CCPortal): Time–height variation of winds and turbulence during typical tropical pre-monsoon thunderstorm events observed from high-resolution Doppler wind lidar measurements

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DOI	10.1007/s11069-020-04038-0
	Time–height variation of winds and turbulence during typical tropical pre-monsoon thunderstorm events observed from high-resolution Doppler wind lidar measurements
	Ruchith R.D.; Ernest Raj P.
发表日期	2020
ISSN	0921030X
起始页码	1355
结束页码	1365
卷号	103 期号:1
英文摘要	High spatiotemporal resolution measurements of horizontal and vertical winds made using a Doppler wind lidar during development and mature stages of few typical tropical thunderstorm events in 2014 over a continental Indian station are used to study the dynamical changes that take place in the lower atmospheric layers close to surface. Results show significant time–height variability in horizontal wind especially 2–3 h before rainfall on ground. The recorded vertical motions on the thunderstorm days showed that during its developing stage, alternating updrafts and downdrafts are prevalent through the entire vertical column of the lower atmosphere with the magnitude of fluctuations being higher compared to those on non-thunderstorm days. Turbulence intensity is high in magnitude during the evolution of intense convection. Alternating layers of convergence and divergence with horizontally time-stratified layers of strong positive and negative wind shear are observed which seem to contribute to strengthening and vertical growth of local convection. Thus, high-resolution time–height variations in horizontal and vertical winds in the lower atmosphere during the life cycle of a tropical thunderstorm provide a better understanding of the atmospheric dynamics associated with it and short-duration heavy precipitation it produces. © 2020, Springer Nature B.V.
关键词	Doppler wind lidar Thunderstorm Turbulence Updrafts/downdrafts
英文关键词	atmospheric convection; Doppler lidar; height; image resolution; measurement method; monsoon; spatiotemporal analysis; thunderstorm; turbulence; wind forcing; India
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205909
作者单位	Cochin University of Science and Technology, Kochi, Kerala, India; Pune, India
推荐引用方式 GB/T 7714	Ruchith R.D.,Ernest Raj P.. Time–height variation of winds and turbulence during typical tropical pre-monsoon thunderstorm events observed from high-resolution Doppler wind lidar measurements[J],2020,103(1).
APA	Ruchith R.D.,&Ernest Raj P..(2020).Time–height variation of winds and turbulence during typical tropical pre-monsoon thunderstorm events observed from high-resolution Doppler wind lidar measurements.Natural Hazards,103(1).
MLA	Ruchith R.D.,et al."Time–height variation of winds and turbulence during typical tropical pre-monsoon thunderstorm events observed from high-resolution Doppler wind lidar measurements".Natural Hazards 103.1(2020).