气候变化领域集成服务门户(CCPortal): Connections Between a Late Summer Snowstorm Over the Southwestern Tibetan Plateau and a Concurrent Indian Monsoon Low-Pressure System

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DOI	10.1029/2018JD029710
	Connections Between a Late Summer Snowstorm Over the Southwestern Tibetan Plateau and a Concurrent Indian Monsoon Low-Pressure System
	Dong, Wenhao; Lin, Yanluan; Wright, Jonathon S.; Xie, Yuanyu; Xu, Fanghua; Yang, Kun; Li, Xin; Tian, Lide; Zhao, Xi; Cao, Dianbin
通讯作者	Dong, WH (通讯作者)
发表日期	2018
ISSN	2169-897X
EISSN	2169-8996
起始页码	13676
结束页码	13691
卷号	123 期号:24
英文摘要	Snowstorms cause more damage to the livelihoods and livestock of more than 2 million herders (80% of the total population) on the Tibetan Plateau than any other natural disaster. In this study, we investigate an extreme snowstorm over the southwestern Tibetan Plateau (SWTP) that occurred on 18-21 September 2008. We explore sources and transport pathways of moisture to this storm using multiple data sets and a series of regional model simulations. The results show that this snowstorm results from dynamical coupling between an upper-level trough and a concurrent low-pressure system over northern India. This tropical-extratropical interaction provides the dynamical mechanism for the snowstorm to occur: the upper level trough favors southward cold advection upstream of the SWTP while the low-pressure system over northern India provides an abundant supply of moisture. Model-based sensitivity tests indicate that large amounts of moisture are transported over the SWTP via both the up-and-over and upslope transport pathways. Our findings corroborate that low-pressure systems over northern India can deliver abundant moisture into the SWTP. The coupling of this abundant supply of moisture with an upper-level trough further leads to the occurrence of an early snow disaster in this case, aggravating already harsh conditions and causing severe damage. Improved understanding of the interactions between these two types of synoptic systems and the climatic conditions that influence their occurrence would aid the development of effective strategies for climate change adaptation and sustainable husbandry, as well as the mitigation and relief of future snow disasters in this region.
关键词	PASTORAL AREAS SNOW COVER PRECIPITATION VARIABILITY CIRCULATION SEASONALITY REANALYSIS RAINFALL EVENTS CHINA
英文关键词	summertime snowfall; southwestern Tibetan Plateau; tropical-extratropical interaction; upper-level trough; monsoon low-pressure system
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000455876300004
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259151
推荐引用方式 GB/T 7714	Dong, Wenhao,Lin, Yanluan,Wright, Jonathon S.,et al. Connections Between a Late Summer Snowstorm Over the Southwestern Tibetan Plateau and a Concurrent Indian Monsoon Low-Pressure System[J]. 中国科学院青藏高原研究所,2018,123(24).
APA	Dong, Wenhao.,Lin, Yanluan.,Wright, Jonathon S..,Xie, Yuanyu.,Xu, Fanghua.,...&Cao, Dianbin.(2018).Connections Between a Late Summer Snowstorm Over the Southwestern Tibetan Plateau and a Concurrent Indian Monsoon Low-Pressure System.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(24).
MLA	Dong, Wenhao,et al."Connections Between a Late Summer Snowstorm Over the Southwestern Tibetan Plateau and a Concurrent Indian Monsoon Low-Pressure System".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.24(2018).