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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, Priyanka; Satheesh, Sreedharan Krishnakumari; Moorthy, Krishnaswamy Krishna
通讯作者	Banerjee, P (corresponding author), Indian Inst Sci, Divecha Ctr Climate Change, Bangalore, Karnataka, India.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2021
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. Plain Language Summary On the evening of May 02, 2018, northwest India was affected by a severe dust storm which resulted in more than 100 casualties and large damage to properties. In this study, we show that this storm was Haboob type formed due to the unusual condition of anomalous moist easterlies meeting the dry westerlies along a front-like structure over the eastern Thar Desert. The strong downdrafts from the deep convection so developed were responsible for lifting soil dust. The strength and the positioning of the upper-level jet stream was a key factor in guiding the surface-level easterlies. The formation of this dust storm was further aided by dry and warm anomalies over northwest India during the previous months.
英文关键词	convection downdraft dust storm Haboob Indo-Gangetic Plain
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000640969000018
WOS关键词	AEROSOL OPTICAL DEPTH ; MINERAL DUST ; SIZE DISTRIBUTION ; INTERANNUAL VARIABILITY ; GLOBAL PRECIPITATION ; SURFACE-TEMPERATURE ; PARTICULATE MATTER ; AIR-QUALITY ; SOUTH-ASIA ; WIND-SPEED
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350832
作者单位	[Banerjee, Priyanka; Satheesh, Sreedharan Krishnakumari] Indian Inst Sci, Divecha Ctr Climate Change, Bangalore, Karnataka, India; [Satheesh, Sreedharan Krishnakumari; Moorthy, Krishnaswamy Krishna] Indian Inst Sci, Ctr Atmospher & Ocean Sci, Bangalore, Karnataka, India
推荐引用方式 GB/T 7714	Banerjee, Priyanka,Satheesh, Sreedharan Krishnakumari,Moorthy, Krishnaswamy Krishna. The Unusual Severe Dust Storm of May 2018 Over Northern India: Genesis, Propagation, and Associated Conditions[J],2021,126(7).
APA	Banerjee, Priyanka,Satheesh, Sreedharan Krishnakumari,&Moorthy, Krishnaswamy Krishna.(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, Priyanka,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).