干旱区生态环境知识资源中心(Arid): Effects of a preexisting cold pool on the initiation of an extreme rainfall in southern Xinjiang

Arid

DOI	10.1016/j.atmosres.2023.107151
	Effects of a preexisting cold pool on the initiation of an extreme rainfall in southern Xinjiang
	Shen, Dongdong; Li, Na; Ran, Lingkun; Yin, Lei; Jiao, Baofeng; Liu, Yuchen
通讯作者	Li, N
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2024
卷号	299
英文摘要	On June 15, 2021, the Hotan region of southern Xinjiang was hit by an extreme rainfall event. A numerical simulation of the storm process, with a resolution of 3 km, was conducted to analyze the initiation mechanism of the rainfall. The results show that lifting conditions play a crucial role in triggering convection, compared to moisture and stratification conditions. The easterly jet changes the direction in the western part of the Tarim Basin and speeds up, creating a zone of high wind speeds in front of Kunlun Mountain's northern slope, which provides favorable conditions for convection initiation. A remarkable feature during this process is the effect of a preexisting distant cold pool on the southern slope of Tianshan Mountain. The cold pool impedes the easterly development of the easterly airflow in the basin, causing it to turn northward, and accelerates the mountain front airflow in front of Kunlun Mountain. The inner dynamic mechanism is a strengthening of the low-level horizontal pressure gradient between the cold pool and the low-pressure belt along Kunlun Mountain. The numerical sensitivity experiments also highlight the key role the distant cold pool plays in the development of the highspeed wind belt ahead of the mountain and causes convection to start 4 h earlier. These results will serve as a valuable reference for future studies on the formation process of convection and improve the understanding of precipitation forecast in arid and semi-arid regions.
英文关键词	Convective initiation Cold pool Southern Xinjiang Rainstorm
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001165247500001
WOS关键词	CONVECTION INITIATION ; PRECIPITATION EXTREMES ; NORTHWEST CHINA ; ARID REGION ; TEMPERATURE ; STORM ; FRONT
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/2XILL650/402989
推荐引用方式 GB/T 7714	Shen, Dongdong,Li, Na,Ran, Lingkun,et al. Effects of a preexisting cold pool on the initiation of an extreme rainfall in southern Xinjiang[J],2024,299.
APA	Shen, Dongdong,Li, Na,Ran, Lingkun,Yin, Lei,Jiao, Baofeng,&Liu, Yuchen.(2024).Effects of a preexisting cold pool on the initiation of an extreme rainfall in southern Xinjiang.ATMOSPHERIC RESEARCH,299.
MLA	Shen, Dongdong,et al."Effects of a preexisting cold pool on the initiation of an extreme rainfall in southern Xinjiang".ATMOSPHERIC RESEARCH 299(2024).