气候变化领域集成服务门户(CCPortal): Favorable Circulation Patterns and Moisture Sources for Wintertime Extreme Precipitation Events Over the Balkhash-Junggar Region

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DOI	10.1029/2019JD032275
	Favorable Circulation Patterns and Moisture Sources for Wintertime Extreme Precipitation Events Over the Balkhash-Junggar Region
	He X.; Huang W.; Yang Z.; Wright J.S.; Wang B.; Xie Z.; Qiu T.; Dong W.; Lu H.; Li X.; Liao J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:16
英文摘要	The Balkhash-Junggar (B-J) region is a typical dryland region with strong sensitivity to climate change. The snowstorms of the year 2009 caused financial damage worth of 2,516 million RMB. This study examines the dynamical features and the moisture sources associated with wintertime extreme precipitation over the B-J region. The analyses are based primarily on the data set from ERA-Interim during DJF 1979–2017. Both Lagrangian and Eulerian approaches are used to examine the moisture sources. An upper-tropospheric Rossby wave train that extends from the North Atlantic Ocean to the B-J region is found to play a leading role in the formation of 127 wintertime extreme precipitation events in the B-J region. This Rossby wave train deepens a cyclonic anomaly in the lower troposphere over the B-J region, which favors the development of strong southwesterly moisture transport and strong updrafts there. These conditions are favorable for the occurrence of extreme precipitation events over the B-J region. Lagrangian moisture source analysis indicates that most of the moisture for precipitation during these events comes from terrestrial sources, with central Asia the key moisture source region. The Eulerian moisture budget analysis further shows that most of the moisture for extreme precipitation enters the B-J region through its western boundary via enhanced southwesterly flow. These dynamical and moisture source analyses establish a set of valuable precursor conditions for predicting wintertime extreme precipitation events over the B-J region. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Balkhash-Junggar; dryland; evaporative moisture source; extreme precipitation; Lagrangian approach; Rossby wave train
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185837
作者单位	Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science (DESS), Tsinghua University, Beijing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing, China; International Center for Climate and Environment Sciences, Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing, China; Cooperative Programs for the Advancement of Earth System Science, University Corporation for Atmospheric Research, Boulder, CO, United States; Geophysical Fluid Dynamics Laboratory, NOAA, Princeton, NJ, United States; National Marine Environmental Forecasting Center, Key Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources, Beijing, China; National Meteorological Information Center, Beijing, China
推荐引用方式 GB/T 7714	He X.,Huang W.,Yang Z.,et al. Favorable Circulation Patterns and Moisture Sources for Wintertime Extreme Precipitation Events Over the Balkhash-Junggar Region[J],2020,125(16).
APA	He X..,Huang W..,Yang Z..,Wright J.S..,Wang B..,...&Liao J..(2020).Favorable Circulation Patterns and Moisture Sources for Wintertime Extreme Precipitation Events Over the Balkhash-Junggar Region.Journal of Geophysical Research: Atmospheres,125(16).
MLA	He X.,et al."Favorable Circulation Patterns and Moisture Sources for Wintertime Extreme Precipitation Events Over the Balkhash-Junggar Region".Journal of Geophysical Research: Atmospheres 125.16(2020).