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

CCPortal

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, Xiangnan; Yang, Kun; Zhou, Xu; Wang, Yan; Lazhu; Chen, Yingying; Lu, Hui
通讯作者	Yang, K (通讯作者)
发表日期	2021
ISSN	0930-7575
EISSN	1432-0894
起始页码	2113
结束页码	2126
卷号	56 期号:7-8
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.
关键词	TRANSIENT LINEAR ORGANIZATION NONLINEAR SCALE INTERACTIONS PHYSICAL CONTROLS EFFECT CLOUDS WIND STRESS PART II SIMULATION MODEL CLIMATE EVAPORATION
英文关键词	Precipitation enhancement; Aerodynamic surface roughness; Tibetan Plateau; Lake-air interaction; Summer
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000605141600006
来源期刊	CLIMATE DYNAMICS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260305
推荐引用方式 GB/T 7714	Yao, Xiangnan,Yang, Kun,Zhou, Xu,et al. Surface friction contrast between water body and land enhances precipitation downwind of a large lake in Tibet[J]. 中国科学院青藏高原研究所,2021,56(7-8).
APA	Yao, Xiangnan.,Yang, Kun.,Zhou, Xu.,Wang, Yan.,Lazhu.,...&Lu, Hui.(2021).Surface friction contrast between water body and land enhances precipitation downwind of a large lake in Tibet.CLIMATE DYNAMICS,56(7-8).
MLA	Yao, Xiangnan,et al."Surface friction contrast between water body and land enhances precipitation downwind of a large lake in Tibet".CLIMATE DYNAMICS 56.7-8(2021).