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DOI	10.1029/2020JD032369
	The Unusual Severe Dust Storm of May 2018 Over Northern India: Genesis, Propagation, and Associated Conditions
	Banerjee P.; Satheesh S.K.; Moorthy K.K.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	On the evening of May 02, 2018, an unusually severe dust storm (DS) from a convective system, which developed over the Thar Desert, struck northwest India resulting in more than 100 casualties. Analysis of its genesis from surface measurements and reanalysis data indicates that this DS was “Haboob” type which are formed when strong downdrafts from a convective system reaches the surface in arid regions. Surface observations show that this DS was accompanied by a sharp drop in temperature and visibility and increase in relative humidity. Model simulation at convective-permitting scale reveals the complex structure of dust transport in space and time. In contrast to the generally observed dust storms over the Indo-Gangetic Plain being mostly associated with westerly wind bringing dust from Southwest Asia and Eastern Africa, this particular DS was triggered by strong easterly wind. The moisture-laden easterly wind at the surface level colliding against the dry westerlies from the desert region along a steep front resulted in strong convection over northwest India leading to the formation of strong downdrafts. This, in turn, was largely due to the positioning of the upper level jet stream, which modulated the location and the strengths of surface lows and highs. The importance of this study is that while recent studies indicate that dust aerosol over India is on the decline partly due to reduction in westerly wind strength, the present work shows that anomalous easterlies can provide an alternate pathway to intense dust storms over the region. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	convection; downdraft; dust storm; Haboob; Indo-Gangetic Plain
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185372
作者单位	Divecha Centre for Climate Change, Indian Institute of Science, Bangalore, India; Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore, India
推荐引用方式 GB/T 7714	Banerjee P.,Satheesh S.K.,Moorthy K.K.. The Unusual Severe Dust Storm of May 2018 Over Northern India: Genesis, Propagation, and Associated Conditions[J],2021,126(7).
APA	Banerjee P.,Satheesh S.K.,&Moorthy K.K..(2021).The Unusual Severe Dust Storm of May 2018 Over Northern India: Genesis, Propagation, and Associated Conditions.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Banerjee P.,et al."The Unusual Severe Dust Storm of May 2018 Over Northern India: Genesis, Propagation, and Associated Conditions".Journal of Geophysical Research: Atmospheres 126.7(2021).