气候变化领域集成服务门户(CCPortal): Climate response of the south Asian monsoon system to West Asia; Tibetan Plateau and local dust emissions

CCPortal

DOI	10.1007/s00382-019-04925-8
	Climate response of the south Asian monsoon system to West Asia; Tibetan Plateau and local dust emissions
	Singh C.; Ganguly D.; Sharma P.; Mishra S.
发表日期	2019
ISSN	0930-7575
起始页码	6245
结束页码	6264
卷号	53 期号:2020-09-10
英文摘要	The equilibrium climate response of the south Asian monsoon (SAM) system to West Asia (WA), Tibetan Plateau (TP) and local dust emissions is investigated through a series of systematically designed idealized numerical experiments using CESM1-SOM, an atmospheric general circulation model coupled with a slab ocean model. Our results show that while an increased (decreased) dust emissions from the WA region produces a significant positive impact in the range of 0.20–0.40 mm/day (negative impact ~ 0.40–0.60 mm/day) on the summer monsoon precipitation over south Asia particularly over the Indian subcontinent, a perpetual perturbation ranging from complete suppression to nearly doubling of dust emissions from the TP region or locally within south Asia yield relatively weaker and largely insignificant responses in the seasonal mean monsoon climate over south Asia. Distinctly opposite responses of the SAM system are noted to the suppression and enhancement of dust emissions from the WA region. A perpetual enhancement (suppression) of dust emissions from the WA region results in atmospheric circulation changes and alters the atmospheric temperature distribution over the south Asian region by warming (cooling) the free troposphere in such a way that it strengthens (weakens) the crucial north–south meridional mid-to-upper tropospheric temperature gradient as well as the magnitude of the vertical shear of zonal winds during the beginning of the summer monsoon season which further results in atmospheric circulation by favoring (opposing) the prevailing low level south-westerly winds and upper level northerly winds, leading to a strengthening (weakening) of the climatological summertime local Hadley cell circulation and leading to an increase (a decrease) in seasonal mean precipitation across most parts of South Asia and most significantly during the month of June. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	CESM1-SOM; Dust; Equilibrium climate response; South Asian monsoon; West Asia
语种	英语
scopus关键词	air-sea interaction; atmosphere-ocean coupling; atmospheric circulation; atmospheric general circulation model; climate effect; dust; emission inventory; Hadley cell; monsoon; temperature gradient; troposphere; zonal wind; China; Qinghai-Xizang Plateau; West Asia
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145854
作者单位	Indian Institute of Remote Sensing, ISRO, Dehradun, India; Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi, India
推荐引用方式 GB/T 7714	Singh C.,Ganguly D.,Sharma P.,et al. Climate response of the south Asian monsoon system to West Asia; Tibetan Plateau and local dust emissions[J],2019,53(2020-09-10).
APA	Singh C.,Ganguly D.,Sharma P.,&Mishra S..(2019).Climate response of the south Asian monsoon system to West Asia; Tibetan Plateau and local dust emissions.Climate Dynamics,53(2020-09-10).
MLA	Singh C.,et al."Climate response of the south Asian monsoon system to West Asia; Tibetan Plateau and local dust emissions".Climate Dynamics 53.2020-09-10(2019).