气候变化领域集成服务门户(CCPortal): Dynamic origin of the interannual variability of West China autumn rainfall

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DOI	10.1175/JCLI-D-20-0097.1
	Dynamic origin of the interannual variability of West China autumn rainfall
	Zhu Z.; Lu R.; Yan H.; Li W.; Li T.; He J.
发表日期	2020
ISSN	0894-8755
起始页码	9643
结束页码	9652
卷号	33 期号:22
英文摘要	The dynamic origin of the interannual variability of West China autumn rainfall (WCAR), a special weather/climate phenomenon over western-central China in September and October, was investigated via observational diagnosis and numerical simulations. Here we found that the interannual variability of WCAR is closely related to the local horizontal trough, which is passively induced by two lower-level anticyclonic (high pressure) anomalies over East Asia. The anticyclonic anomaly over the south is a Gill-type response to the central and eastern Pacific diabatic cooling, while that over the north is part of the mid- to high-latitude barotropic Rossby wave train, which could be induced by either the thermal forcing of the central and eastern Pacific Ocean sea surface temperature (SST) cooling or that of the subtropical northern Atlantic Ocean SST warming. The quasi-barotropic high pressure anomaly over East Asia acts as an "invisible mountain"that steers the low-level anomalous southwesterly into a southeasterly and hinders the water vapor going farther to the north, leading to enhanced WCAR. However, the real mountain ranges in the region (the Qinglin and Ba Mountains) have no essential impact on the formation and interannual variability of WCAR. © 2020 American Meteorological Society.
英文关键词	Landforms; Mechanical waves; Rain; Surface waters; Anticyclonic anomalies; Eastern pacific; Eastern pacific Ocean; Interannual variability; Mountain ranges; Sea surface temperature (SST); Special weather; Thermal forcing; Ocean currents; air-sea interaction; annual variation; anticyclone; atmospheric dynamics; computer simulation; numerical model; orographic effect; seasonal variation; standing wave; teleconnection; China
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171009
作者单位	Key Laboratory of Meteorological Disaster, Ministry of Education, Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; International Pacific Research Center, Department of Atmospheric Sciences, University of Hawai'i at Manoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Zhu Z.,Lu R.,Yan H.,et al. Dynamic origin of the interannual variability of West China autumn rainfall[J],2020,33(22).
APA	Zhu Z.,Lu R.,Yan H.,Li W.,Li T.,&He J..(2020).Dynamic origin of the interannual variability of West China autumn rainfall.Journal of Climate,33(22).
MLA	Zhu Z.,et al."Dynamic origin of the interannual variability of West China autumn rainfall".Journal of Climate 33.22(2020).