干旱区生态环境知识资源中心(Arid): Mechanism of winter precipitation variations in the southern arid Central Asia

Arid

DOI	10.1002/joc.7480
	Mechanism of winter precipitation variations in the southern arid Central Asia
	Xie, Tingting; Huang, Wei; Feng, Song; Wang, Tao; Liu, Yan; Chen, Jianhui; Chen, Fahu
通讯作者	Huang, W (corresponding author), Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China.
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2021-12
英文摘要	The southern arid central Asia (SACA, 35.25 degrees-45 degrees N, 46.25 degrees-80 degrees E) is influenced by Mediterranean type of climate with wet cool season. This study analysed the variations of winter precipitation and their mechanisms during 1979-2017. The results suggest the variations of winter precipitation in SACA are influenced by two water vapour pathways, which are closely linked to a low-latitude high-pressure anomaly near Indian subcontinent and the mid-high latitude North Atlantic Oscillation (NAO), respectively. Specifically, at low latitudes, the northern Indian Ocean heated by El Nino causes the anomalous intensification of the subtropical high throughout the low latitude region, especially over the Indian subcontinent, resulting in increased water vapour transport from the northern Indian Ocean to SACA. This result of low latitude is also supported by model simulations. At middle and high latitudes, the negative NAO phase leads to a southward displacement of the water vapour pathway and carries water vapour to pass over number of upwind water bodies, resulting in the transport of more westerly-associated water vapour to SACA. Further analysis showed that there is a northwest-southeast teleconnection wave train, from the North Atlantic to Central Asia and to the Indian subcontinent, which allows wave fluxes originating in the North Atlantic and the northern Indian Ocean to propagate from high and low latitudes, respectively, to the study area. At the same time, high-latitude cold air advection, brought by the low-pressure system in Central Asia, converges with the flow of warm water vapour from the low-latitude northern Indian Ocean, generating an ascending motion and reducing atmospheric static stability, and thereby lead to increasing precipitation in SACA. Therefore, the key to determining the origin of precipitation variations in SACA is understanding the interaction of large-scale circulation systems at low and mid-high latitudes. Key words arid Central Asia, precipitation, dynamic mechanism
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000728313900001
WOS关键词	SOUTHWEST ASIA ; CLIMATE-CHANGE ; LA-NINA ; DRYLANDS ; ENSO
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374700
作者单位	[Xie, Tingting; Huang, Wei; Liu, Yan; Chen, Jianhui; Chen, Fahu] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China; [Feng, Song] Univ Arkansas, Dept Geosci, Fayetteville, AR 72701 USA; [Wang, Tao] Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China; [Chen, Fahu] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Key Lab Alpine Ecol, Beijing, Peoples R China; [Chen, Fahu] Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xie, Tingting,Huang, Wei,Feng, Song,et al. Mechanism of winter precipitation variations in the southern arid Central Asia[J],2021.
APA	Xie, Tingting.,Huang, Wei.,Feng, Song.,Wang, Tao.,Liu, Yan.,...&Chen, Fahu.(2021).Mechanism of winter precipitation variations in the southern arid Central Asia.INTERNATIONAL JOURNAL OF CLIMATOLOGY.
MLA	Xie, Tingting,et al."Mechanism of winter precipitation variations in the southern arid Central Asia".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2021).