气候变化领域集成服务门户(CCPortal): Counter-clockwise epochal shift of the Indian Monsoon Sparse Zone

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DOI	10.1016/j.atmosres.2021.105806
	Counter-clockwise epochal shift of the Indian Monsoon Sparse Zone
	Barde V.; Sinha P.; Mohanty U.C.; Zhang X.; Niyogi D.
发表日期	2021
ISSN	0169-8095
卷号	263
英文摘要	The Indian southwest monsoon season is considered the lifeline of the region's socioeconomic wellbeing. It is recognized that even small variations often lead to notable impacts on the regional economy and agricultural productivity. As a precursor to droughts, this study identifies from century-long data, Monsoon Sparse Zone (MSZ) as a locale with less seasonal rainfall compared to the long-term average climatology. Identifying the MSZ is crucial to understand the spread and propagation of drought-prone areas. The present study investigates the nature of the major MSZ shift in India during the past 116 years (1901–2016) and probable meteorological factors responsible for that transitions. For this purpose, the high-resolution daily rainfall analysis from India Meteorological Department (IMD) and other surface and upper air meteorological parameters from, the NOAA, CRU, and NCEP-NCAR are used. Two drought indices are used to study the MSZ and its epochal shifts during the past century over India. The MSZ locales follow the counter-clockwise shift from west to north-central India through the peninsular region from one to another epoch (each of 29 years) that is statistically significant. The MSZ shifting is insensitive to epochal duration selection. Large-scale and regional processes that may impact the shift of MSZ are analyzed. The El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) have strong influences on the MSZ shift. Additional synergistic effect of large-scale – factors such as westward shifting of subsidence branch of the Walker circulation, the orientation of IOD and local-scale phenomena like the increased surface temperature, moisture flux inflow from the Bay of Bengal, also have shifts aligning to cause this detectable and significant change in the MSZ locales. The presence of MSZ conforms to the drought-prone area over India and has a direct influence on water resources, agriculture, and allied sectors. © 2021 Elsevier B.V.
英文关键词	Droughts; Indian summer monsoon rainfall; Monsoon sparse zone
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236590
作者单位	School of Earth, Ocean, and Climate Sciences, Indian Institute of Technology, Odisha, 752050, India; National Engineering Research Center of Geographic Information System, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China; Jackson School of Geosciences, Cockrell School of Engineering, The University of Texas at Austin, Austin, TX 78712, United States
推荐引用方式 GB/T 7714	Barde V.,Sinha P.,Mohanty U.C.,et al. Counter-clockwise epochal shift of the Indian Monsoon Sparse Zone[J],2021,263.
APA	Barde V.,Sinha P.,Mohanty U.C.,Zhang X.,&Niyogi D..(2021).Counter-clockwise epochal shift of the Indian Monsoon Sparse Zone.Atmospheric Research,263.
MLA	Barde V.,et al."Counter-clockwise epochal shift of the Indian Monsoon Sparse Zone".Atmospheric Research 263(2021).