气候变化领域集成服务门户(CCPortal): Surface friction contrast between water body and land enhances precipitation downwind of a large lake in Tibet

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DOI	10.1007/s00382-020-05575-x
	Surface friction contrast between water body and land enhances precipitation downwind of a large lake in Tibet
	Yao X.; Yang K.; Zhou X.; Wang Y.; Lazhu; Chen Y.; Lu H.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-07-08
英文摘要	Lake-air interaction plays an important role in controlling local weather and climate. This study aims to reveal the dynamical effect of water-land roughness contrast on precipitation during a summer rainfall event, which was detected by rain gauge and remote sensing observations around Lake Selin Co (a large Tibetan lake). During this event, precipitation amount to the west (downwind) of the lake was much higher than that to the east (upwind). Numerical experiments based on Weather Research and Forecasting model (WRF) were conducted to investigate this phenomenon. High-resolution WRF simulations can reproduce the precipitation contrast between downwind and upwind of the lake, but fails with the lake aerodynamic surface roughness enhanced by either enlarging the length directly or replacing the lake with adjacent land cover. Further analyses indicate that the water-land surface friction contrast directly leads to acceleration of wind above the water surface and deceleration over the land surface, enhancing the air convergence and precipitation over land area downwind of the lake. By contrast, the heat flux and evaporation from the lake are small in summer and hardly show important effects on precipitation around the lake. Therefore, the dynamical effect of the lake surface plays a dominant role in the precipitation enhancement downwind of the lake during the summer. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
英文关键词	Aerodynamic surface roughness; Lake-air interaction; Precipitation enhancement; Summer; Tibetan 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/183340
作者单位	Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, 100084, China; National Tibetan Plateau Data Center, Key Laboratory of Tibetan Environmental Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; Department of Meteorology and Atmospheric Science, Pennsylvania State University, State College, 16802, United States
推荐引用方式 GB/T 7714	Yao X.,Yang K.,Zhou X.,et al. Surface friction contrast between water body and land enhances precipitation downwind of a large lake in Tibet[J],2021,56(2021-07-08).
APA	Yao X..,Yang K..,Zhou X..,Wang Y..,Lazhu.,...&Lu H..(2021).Surface friction contrast between water body and land enhances precipitation downwind of a large lake in Tibet.Climate Dynamics,56(2021-07-08).
MLA	Yao X.,et al."Surface friction contrast between water body and land enhances precipitation downwind of a large lake in Tibet".Climate Dynamics 56.2021-07-08(2021).