气候变化领域集成服务门户(CCPortal): Tracking moisture sources of precipitation over central asia: A study based on the water-source-tagging method

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DOI	10.1175/JCLI-D-20-0169.1
	Tracking moisture sources of precipitation over central asia: A study based on the water-source-tagging method
	Jiang J.; Zhou T.; Wang H.; Qian Y.; Noone D.; Man W.
发表日期	2020
ISSN	0894-8755
起始页码	10339
结束页码	10355
卷号	33 期号:23
英文摘要	Central Asia is a semiarid to arid region that is sensitive to hydrological changes. We use the Community Atmosphere Model, version 5 (CAM5), equipped with a water-tagging capability, to investigate the major moisture sources for climatological precipitation and its long-term trends over central Asia. Europe, the North Atlantic Ocean, and local evaporation, which explain 33.2% 6 1.5%, 23.0% 6 2.5%, and 19.4% 6 2.2% of the precipitation, respectively, are identified as the most dominant moisture sources for northern central Asia (NCA). For precipitation over southern central Asia (SCA), Europe, the North Atlantic, and local evaporation contribute 25.4% 6 2.7%, 18.0% 6 1.7%, and 14.7% 6 1.9%, respectively. In addition, the contributions of South Asia (8.6% 6 1.7%) and the Indian Ocean (9.5% 6 2.0%) are also substantial for SCA. Modulated by the seasonal meridional shift in the subtropical westerly jet, moisture originating from the low and midlatitudes is important in winter, spring, and autumn, whereas northern Europe contributes more to summer precipitation. We also explain the observed drying trends over southeastern central Asia in spring and over NCA in summer during 1956–2005. The drying trend over southeastern central Asia in spring is mainly due to the decrease in local evaporation and weakened moisture fluxes from the Arabian Peninsula and Arabian Sea associated with the warming of the western Pacific Ocean. The drying trend over NCA in summer can be attributed to a decrease in local evaporation and reduced moisture from northern Europe that is due to the southward shift of the subtropical westerly jet. © 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	Drying; Evaporation; Oceanography; Tropics; Community atmosphere model; Hydrological changes; Long-term trend; Moisture fluxes; Moisture sources; North Atlantic Ocean; Summer precipitation; Western Pacific; Moisture; atmospheric moisture; evaporation; numerical model; precipitation (climatology); semiarid region; sensitivity analysis; tracking; trend analysis; Arabian Peninsula; Asia; Indian Ocean
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/171020
作者单位	State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; Pacific Northwest National Laboratory, Richland, WA, United States; Department of Physics, University of Auckland, Auckland, New Zealand; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States
推荐引用方式 GB/T 7714	Jiang J.,Zhou T.,Wang H.,et al. Tracking moisture sources of precipitation over central asia: A study based on the water-source-tagging method[J],2020,33(23).
APA	Jiang J.,Zhou T.,Wang H.,Qian Y.,Noone D.,&Man W..(2020).Tracking moisture sources of precipitation over central asia: A study based on the water-source-tagging method.Journal of Climate,33(23).
MLA	Jiang J.,et al."Tracking moisture sources of precipitation over central asia: A study based on the water-source-tagging method".Journal of Climate 33.23(2020).