气候变化领域集成服务门户(CCPortal): Characteristics of summer regional rainfall events over Ili River Valley in Northwest China

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DOI	10.1016/j.atmosres.2020.104996
	Characteristics of summer regional rainfall events over Ili River Valley in Northwest China
	Li L.; Li J.; Yu R.
发表日期	2020
ISSN	0169-8095
卷号	243
英文摘要	The Ili River Valley is a trumpet-like terrain facing westward. From west to east, the elevation of the valley floor increases and the width of the valley decreases. Using hourly rainfall data of 2009–2016 obtained from 100 gauge stations over the Ili River Valley, the climatic features of summer regional rainfall events (RREs) are investigated. The mean amount and frequency of rainfall during summer show considerable spatial variabilities in terms of along-valley and across-valley directions. Along the valley, the rainfall gradually increases with increasing elevations. Across the valley, the rainfall also increases from the valley floor to the northern or southern slopes. Three distinct types of RREs are identified: western-local, eastern-local, and eastward-movement RREs. The eastern-local and western-local RREs are located over the east and west of the valley, respectively. The eastern-local RREs have more numbers and longer duration than the western-local ones, resulting in more rainfall in the east than in the west of the valley. In contrast, the eastward-movement RREs with the longest duration initiate from the west of the valley and gradually move to the east of the valley. For these RREs, the spatial distribution of the composite rainfall exhibits a similar pattern to that of the summer mean rainfall. These contribute to more than half of the summer total rainfall in most stations. It is found that the circulation structure accompanying the eastward-movement RREs exhibits a consistent feature with that of the Central Asia vortex/trough systems, and the eastward movement of the entire circulation system is in correspondence with that of the rainfalll center. © 2020 Elsevier B.V.
关键词	Floors Rain Rivers Circulation systems Climatic features NorthWest China Rainfall data Rainfall event Similar pattern Spatial variability Total rainfall Landforms frequency analysis precipitation assessment precipitation intensity raingauge seasonal variation spatiotemporal analysis Ili Valley
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132430
推荐引用方式 GB/T 7714	Li L.,Li J.,Yu R.. Characteristics of summer regional rainfall events over Ili River Valley in Northwest China[J]. Atmospheric Research,2020,243.
APA	Li L.,Li J.,&Yu R..(2020).Characteristics of summer regional rainfall events over Ili River Valley in Northwest China.,243.
MLA	Li L.,et al."Characteristics of summer regional rainfall events over Ili River Valley in Northwest China".243(2020).