干旱区生态环境知识资源中心(Arid): Mechanism of the summer rainfall interannual variability in transitional climate zone in East Asia: roles of teleconnection patterns and associated moisture processes

Arid

DOI	10.1007/s00382-022-06618-1
	Mechanism of the summer rainfall interannual variability in transitional climate zone in East Asia: roles of teleconnection patterns and associated moisture processes
	Wang, Qiulin; Wang, Lin; Huang, Gang; Wang, Ting
通讯作者	Wang, L
来源期刊	CLIMATE DYNAMICS
ISSN	0930-7575
EISSN	1432-0894
出版年	2023
卷号	61 期号:3-4 页码:1177-1192
英文摘要	Transitional climate zone (TCZ) over East Asia is located between humid and arid regions, which is a highly sensitive and disaster-prone region especially under global climate change. Due to limited water resources, the atmospheric moisture availability has a dominant control on the precipitation variability. Hence, this study is motivated to reveal the key teleconnection patterns and associated moisture processes that govern the interannual variability of the summer precipitation over TCZ. In order to better diagnose moisture budget, the Lagrangian particle dispersion model FLEXPART is employed for quantifying contribution from moisture sources. Above all, the observational analysis highlights two critical modes, one is Eurasian teleconnection (EU) and the other is Circumglobal Teleconnection (CGT). As regards EU pattern, positive EU phase corresponds to ample precipitation in TCZ. In the presence of positive phase, it underlines a +-+- pattern of geopotential height anomalies stretching from western Europe to Mongolia plateau. In the context, the cyclonic flow and low pressure over Mongolia plateau act to enhance moisture flux from the west and the south and to prompt upward motions. Further moisture diagnoses illuminate largest increase of moisture uptake in monsoon dominated region, followed by the westerlies dominated region. However, the eventual contribution of summer monsoon is a little bit less than that of westerlies, due to the grand loss en route. In addition, the local evaporation exerts little impact. CGT propagates along the mid-latitude westerly jet, which is positively coupled with the precipitation in TCZ. Under the positive phase, there is an ascending motion over TCZ, which bears great resemblance to the EU case. However, unlike the result of moisture attribution in EU case, the southerly monsoon has the largest contribution followed by local effect, while the westerlies have little impact due to the cancellation of wetting and drying regimes along the pathway.
英文关键词	Transitional climate zone Summer precipitation Inter-annual variability Lagrangian moisture tracking Teleconnection Mechanism
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000899039900002
WOS关键词	ATMOSPHERIC CIRCULATION ; EURASIAN TELECONNECTION ; AUGUST 2002 ; PART I ; MONSOON ; PRECIPITATION ; CHINA ; IMPACT ; WATER ; OSCILLATION
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/2XILL650/395775
推荐引用方式 GB/T 7714	Wang, Qiulin,Wang, Lin,Huang, Gang,et al. Mechanism of the summer rainfall interannual variability in transitional climate zone in East Asia: roles of teleconnection patterns and associated moisture processes[J],2023,61(3-4):1177-1192.
APA	Wang, Qiulin,Wang, Lin,Huang, Gang,&Wang, Ting.(2023).Mechanism of the summer rainfall interannual variability in transitional climate zone in East Asia: roles of teleconnection patterns and associated moisture processes.CLIMATE DYNAMICS,61(3-4),1177-1192.
MLA	Wang, Qiulin,et al."Mechanism of the summer rainfall interannual variability in transitional climate zone in East Asia: roles of teleconnection patterns and associated moisture processes".CLIMATE DYNAMICS 61.3-4(2023):1177-1192.