气候变化领域集成服务门户(CCPortal): Elevation-dependent sensible heat flux trend over the Tibetan Plateau and its possible causes

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DOI	10.1007/s00382-018-4360-7
	Elevation-dependent sensible heat flux trend over the Tibetan Plateau and its possible causes
	Zhu L.; Huang G.; Fan G.; Qü X.; Wang Z.; Hua W.
发表日期	2019
ISSN	0930-7575
起始页码	3997
结束页码	4009
卷号	52 期号:2020-07-08
英文摘要	The present study documents the elevation-dependent sensible heat (SH) flux trend over the Tibetan Plateau (TP). The SH displays a decreasing trend over the TP above 2000 m with the magnitude of trend increasing with the elevation, but an increasing trend at low elevation stations. The above feature is more obvious in spring and summer. Surface wind speed is consistently the major contributor to the variation in SH trend from lower to higher altitude areas. Meanwhile, the role of the difference of ground-air temperature (T s –T a ) in SH trend is enhanced above 2500 m regions. The SH variation associated with the change in T s –T a may be influenced primarily by the diminution in sunshine duration and snow depth at higher-altitude regions, and the latter is particularly important. The portion of the SH variation related to the change in surface wind speed is mainly attributed to the dynamic process related to the Pacific Decadal Oscillation (PDO). The warming in the northwestern Pacific in relation to the switch of the PDO from a warm phase to a cold phase in the recent decades causes divergence anomalies in the upper troposphere, which induces propagation of a wave pattern extending eastward until reaching the southwest TP. That leads to an enhancement in divergence of the upper troposphere and subsequently a boost in surface convergence and rising motion over southwest TP. Consequently, due to the easterly anomaly to the east of the convergence, surface wind speed is reduced over the central and eastern TP, especially in the higher altitude areas. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Altitude dependence; Surface sensible heat trend; Surface wind speed; The difference of ground-air temperature; Tibetan Plateau
语种	英语
scopus关键词	air temperature; altitude; Pacific Decadal Oscillation; sensible heat flux; surface wind; trend analysis; wind velocity; China; Qinghai-Xizang Plateau
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146420
作者单位	School of Atmospheric Sciences/ Plateau Atmosphere and Environment Key Laboratory of Sichuan Province/Joint Laboratory of Climate and Environment Change, Chengdu University of Information Technology, Chengdu, 610225, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; Joint Center for Global Change Studies, Beijing, 100875, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
推荐引用方式 GB/T 7714	Zhu L.,Huang G.,Fan G.,et al. Elevation-dependent sensible heat flux trend over the Tibetan Plateau and its possible causes[J],2019,52(2020-07-08).
APA	Zhu L.,Huang G.,Fan G.,Qü X.,Wang Z.,&Hua W..(2019).Elevation-dependent sensible heat flux trend over the Tibetan Plateau and its possible causes.Climate Dynamics,52(2020-07-08).
MLA	Zhu L.,et al."Elevation-dependent sensible heat flux trend over the Tibetan Plateau and its possible causes".Climate Dynamics 52.2020-07-08(2019).