气候变化领域集成服务门户(CCPortal): Spatio-temporal changes in the pre-monsoon thunderstorm activities of northeast India over the past four decades

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DOI	10.1039/d3ea00133d
	Spatio-temporal changes in the pre-monsoon thunderstorm activities of northeast India over the past four decades
	Rastogi, Arpita; Kuttippurath, J.; Patel, V. K.
发表日期	2024
EISSN	2634-3606
起始页码	4
结束页码	5
卷号	4 期号:5
英文摘要	The development of catastrophic mesoscale convective systems in the atmosphere, such as thunderstorms, is caused by several factors, the most important of which is moisture in the lower troposphere and then the instability and lifting of air parcels. In pre-monsoon, northeast and adjoining eastern India are susceptible to thunderstorms. Herein, we analyse the spatial and temporal changes in thunderstorm activities in terms of convective available potential energy (CAPE) and other parameters during the pre-monsoon period (March, April and May) in northeast (NE) and adjoining eastern India using ground-based and reanalysis data. It is observed that atmospheric instability is relatively higher in southern West Bengal and Tripura compared to the other regions in NE and adjoining eastern India, with a CAPE value of about 1500-3000 J kg-1 during pre-monsoon and 2000-3500 J kg-1 in May, indicating that these regions are more vulnerable to thunderstorms. Other thunderstorm indicators such as convective inhibition (CIN), K-index (KI) and total totals index (TTI) also exhibit relatively higher values in these regions during pre-monsoon. Causal discovery and correlation analysis reveal a positive association of thunderstorm days with CAPE and TTI, but a negative link with CIN. A significant negative trend is estimated in CAPE and other parameters in NE and eastern India during May, which is more dominant in southern West Bengal and Tripura (about -8 to -12 J per kg per year). Stability indices such as KI and TTI also show significant negative trends in NE India. There is a negative trend in thunderstorm days at Mohanbari, Barapani, Jorhat, Pasighat and Silchar, while positive trends at Dhubri, Imphal, Tezpur and Lengpui in the recent decade (2011-2020), which is consistent with the changes in thunderstorm indicators at these stations. This study provides an important insight into thunderstorm activity in areas susceptible to extreme weather events in the context of recent climate change and global warming. Thunderstorms inflict significant danger to both human and environment. Here, we present a thorough examination of recent changes in thunderstorm occurrences in the northeast and eastern regions of India.
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001207295500001
来源期刊	ENVIRONMENTAL SCIENCE-ATMOSPHERES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304277
作者单位	Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Kharagpur
推荐引用方式 GB/T 7714	Rastogi, Arpita,Kuttippurath, J.,Patel, V. K.. Spatio-temporal changes in the pre-monsoon thunderstorm activities of northeast India over the past four decades[J],2024,4(5).
APA	Rastogi, Arpita,Kuttippurath, J.,&Patel, V. K..(2024).Spatio-temporal changes in the pre-monsoon thunderstorm activities of northeast India over the past four decades.ENVIRONMENTAL SCIENCE-ATMOSPHERES,4(5).
MLA	Rastogi, Arpita,et al."Spatio-temporal changes in the pre-monsoon thunderstorm activities of northeast India over the past four decades".ENVIRONMENTAL SCIENCE-ATMOSPHERES 4.5(2024).