气候变化领域集成服务门户(CCPortal): Dominance of summer monsoon flash droughts in India

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DOI	10.1088/1748-9326/abaf1d
	Dominance of summer monsoon flash droughts in India
	Mahto S.S.; Mishra V.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	Flash droughts intensify rapidly after onset and cause short-term but devastating impacts on agriculture and the ecosystem. However, the drivers and characteristics of flash droughts in India have not been examined. Here we use a well-calibrated and evaluated variable infiltration capacity (VIC) hydrological model to simulate root-zone soil moisture to identify flash droughts in India for 1951–2018 period. We show that flash droughts predominantly occur during the monsoon (June to September) in India. More than 80% of the country-level flash droughts occurred during the monsoon season in India. Similarly, four out of six homogeneous precipitation regions experienced more droughts during the monsoon season than the non-monsoon season. The Himalayan and Peninsular regions experience more flash droughts during the non-monsoon season primarily due to precipitation caused by western disturbance and northeast monsoon. Long dry spell with significant negative anomalies of precipitation during the monsoon season and positive air temperature anomalies rapidly deplete soil moisture causing flash droughts. The major country-level flash droughts occurred during the monsoon season of 1979, 2001, 1958, and 1986. About 10%–15% of rice (Oryza sativa) and maize (Zea mays) grown area in each year is affected by flash droughts during the monsoon season in India. Flash droughts during the monsoon season in India can directly affect crop production and indirectly pose challenges for meeting increased irrigation water demands. © 2020 The Author(s).
英文关键词	Flash drought; Monsoon; Precipitation; Soil moisture
语种	英语
scopus关键词	Agricultural robots; Atmospheric thermodynamics; Cultivation; Grain (agricultural product); Irrigation; Soil moisture; Air temperature; Homogeneous Precipitation; Hydrological modeling; Irrigation waters; Northeast monsoon; Rice (oryza sativa); Root zone soil moistures; Variable infiltration capacities; Drought; air temperature; calibration; crop production; dominance; drought; hydrological modeling; infiltration; irrigation system; maize; rice; soil moisture; India; Oryza sativa; Zea mays
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153599
作者单位	Earth Sciences, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat, 382355, India; Civil Engineering, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat, 382355, India
推荐引用方式 GB/T 7714	Mahto S.S.,Mishra V.. Dominance of summer monsoon flash droughts in India[J],2020,15(10).
APA	Mahto S.S.,&Mishra V..(2020).Dominance of summer monsoon flash droughts in India.Environmental Research Letters,15(10).
MLA	Mahto S.S.,et al."Dominance of summer monsoon flash droughts in India".Environmental Research Letters 15.10(2020).