气候变化领域集成服务门户(CCPortal): Northward Propagation of the Intertropical Convergence Zone and Strengthening of Indian Summer Monsoon Rainfall

CCPortal

DOI	10.1029/2020GL089823
	Northward Propagation of the Intertropical Convergence Zone and Strengthening of Indian Summer Monsoon Rainfall
	Hari V.; Villarini G.; Karmakar S.; Wilcox L.J.; Collins M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	Since 2002, there has been a clear increase in Indian summer monsoon rainfall (ISMR). We demonstrate that this increase is associated with a change in the dynamics of the Intertropical Convergence Zone (ITCZ). Using a recently released reanalysis product from 1980–2016, we show that the ITCZ has strengthened and propagated northward since 2002. Analysis of the total energy budget reveals an increase in energy divergence and atmospheric diabatic heating, which is consistent with the changes in the ITCZ. Although global aerosol optical depth shows a significant positive trend during 1980–2016, it has declined over many parts of India since 2002. We put forward the hypothesis that this is the driver of the changing characteristics of the ITCZ. Our results suggest that changes in the dynamics of the ITCZ, together with changes in the energy/moisture budget, are responsible for the strengthening of ISMR since 2002, consistent with the emergence of a greenhouse gas-induced signal. © 2020. The Authors.
英文关键词	Atmospheric thermodynamics; Greenhouse gases; Rain; Diabatic heating; Global aerosol; Indian summer monsoon rainfall; Induced signal; Intertropical convergence zone; Reanalysis; Total energy; Budget control; aerosol; aerosol composition; diabatic process; energy budget; intertropical convergence zone; monsoon; optical depth; precipitation intensity; India
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169302
作者单位	Department of Computational Hydrosystems, Helmholtz Centre for Environmental Research, UFZ, Leipzig, Germany; IIHR—Hydroscience and Engineering, University of Iowa, Iowa City, IA, United States; Environmental Science and Engineering Department, Indian Institute of Technology Bombay, Mumbai, India; National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom; College of Engineering Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom
推荐引用方式 GB/T 7714	Hari V.,Villarini G.,Karmakar S.,et al. Northward Propagation of the Intertropical Convergence Zone and Strengthening of Indian Summer Monsoon Rainfall[J],2020,47(23).
APA	Hari V.,Villarini G.,Karmakar S.,Wilcox L.J.,&Collins M..(2020).Northward Propagation of the Intertropical Convergence Zone and Strengthening of Indian Summer Monsoon Rainfall.Geophysical Research Letters,47(23).
MLA	Hari V.,et al."Northward Propagation of the Intertropical Convergence Zone and Strengthening of Indian Summer Monsoon Rainfall".Geophysical Research Letters 47.23(2020).