气候变化领域集成服务门户(CCPortal): How were the eastward-moving heavy rainfall events from the tibetan plateau to the lower reaches of the yangtze river enhanced?

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DOI	10.1175/JCLI-D-20-0226.1
	How were the eastward-moving heavy rainfall events from the tibetan plateau to the lower reaches of the yangtze river enhanced?
	Zhao Y.; Chen D.; Deng Y.; Son S.-W.; Wang X.; Di D.; Pan M.; Ma X.
发表日期	2021
ISSN	0894-8755
起始页码	607
结束页码	620
卷号	34 期号:2
英文摘要	This study investigates eastward-moving summer heavy rainfall events in the lower reaches of the Yangtze River (LRYR), which are associated with the Tibetan Plateau (TP) vortices. On the basis of rainfall data from gauges and additional atmospheric data from ERA-Interim, the dynamic and thermodynamic effects of moisture transport and diabatic heating are estimated to determine the physical mechanisms that support the eastward-moving heavy rainfall events. As the rainband moves eastward, it is accompanied by anomalous cyclonic circulation in the upper and middle troposphere and enhanced vertical motion throughout the troposphere. In particular, the rainfall region is located in the fore of the upper-level trough, which is ideal for baroclinic organization of the convective system and further development of the eastward-moving vortex. The large atmospheric apparent heat source (Q1) also contributes for lifting the lower-level air into the upper atmosphere and for enhancing the low-level convective motion and convergence during the heavy rainfall process. Piecewise potential vorticity inversion further verifies the crucial role that the diabatic heating played in developing the anomalous geopotential height favorable for the enhanced rainfall. The combined action of the dynamic and thermodynamic processes, as well as the rich moisture supply from the seas, synergistically sustained and enhanced the eastward-moving rainfall. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmospheric movements; Moisture; Troposphere; Upper atmosphere; Vortex flow; Convective motions; Cyclonic circulation; Geo-potential heights; Moisture transport; Physical mechanism; Piecewise potential vorticity inversions; Thermodynamic effect; Thermodynamic process; Rain; atmospheric circulation; cyclogenesis; data set; extratropical cyclone; extreme event; hydrological cycle; precipitation intensity; vortex flow; China; Qinghai-Xizang Plateau; Yangtze River
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/170954
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Institute for Climate and Application Research, Nanjing University of Information Science and Technology, Nanjing, China; Key Laboratory for Aerosol-Cloud-Rain of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, China
推荐引用方式 GB/T 7714	Zhao Y.,Chen D.,Deng Y.,et al. How were the eastward-moving heavy rainfall events from the tibetan plateau to the lower reaches of the yangtze river enhanced?[J],2021,34(2).
APA	Zhao Y..,Chen D..,Deng Y..,Son S.-W..,Wang X..,...&Ma X..(2021).How were the eastward-moving heavy rainfall events from the tibetan plateau to the lower reaches of the yangtze river enhanced?.Journal of Climate,34(2).
MLA	Zhao Y.,et al."How were the eastward-moving heavy rainfall events from the tibetan plateau to the lower reaches of the yangtze river enhanced?".Journal of Climate 34.2(2021).