气候变化领域集成服务门户(CCPortal): Effects of Lake Nam Co and Surrounding Terrain on Extreme Precipitation Over Nam Co Basin, Tibetan Plateau: A Case Study

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DOI	10.1029/2021JD036190
	Effects of Lake Nam Co and Surrounding Terrain on Extreme Precipitation Over Nam Co Basin, Tibetan Plateau: A Case Study
	Zhao, Zhizhan; Huang, Anning; Ma, Weiqiang; Wu, Yang; Wen, Lijuan; Lazhu; Gu, Chunlei
通讯作者	Huang, AN (通讯作者)
发表日期	2022
ISSN	2169-897X
EISSN	2169-8996
卷号	127 期号:10
英文摘要	Thousands of lakes and complex topography on Tibetan Plateau (TP) have important impacts on the local weather and climate, especially extreme weather events. In this study, the Weather Research and Forecasting model was adopted to quantify the impacts of Lake Nam Co (LNC) and surrounding topography on the extreme snowfall event over Nam Co basin on 24 October 2006 based on numerical experiments. The accumulated precipitation of 12 hr in this event is characterized by a maximum precipitation center with an intensity exceeding 20 mm over eastern LNC and downwind regions. Results show that the precipitation regionally averaged over eastern LNC and downstream regions can be reduced by 53%, 26%, and 68% when LNC, surrounding terrain, and both of them are absent, respectively, suggesting that LNC plays a dominant role in the formation of this event while the surrounding mountains further amplify the lake effect precipitation/snow over the downwind of LNC. Mechanism analysis indicates that the low-level convective instability and water vapor convergence induced by LNC are essential for the formation of this extreme snowfall event, while the wind deflection and topographic lifting further strengthen the precipitation over the downwind of LNC and shift the snow belt distribution. This study is not only important to deepen the understanding of the complex interactions between the lake and orography and their combined influences on regional extreme precipitation, but also helpful for further improving the refined forecasting of the extreme precipitation induced by the lake and surrounding terrain in other regions over TP.
关键词	GREAT-LAKES REGIONAL CLIMATE SHALLOW LAKE SNOW DISTRIBUTION EFFECT SNOWSTORMS MODEL WRF SIMULATION MESOSCALE IMPACT
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000799037800001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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/260615
推荐引用方式 GB/T 7714	Zhao, Zhizhan,Huang, Anning,Ma, Weiqiang,et al. Effects of Lake Nam Co and Surrounding Terrain on Extreme Precipitation Over Nam Co Basin, Tibetan Plateau: A Case Study[J]. 中国科学院青藏高原研究所,2022,127(10).
APA	Zhao, Zhizhan.,Huang, Anning.,Ma, Weiqiang.,Wu, Yang.,Wen, Lijuan.,...&Gu, Chunlei.(2022).Effects of Lake Nam Co and Surrounding Terrain on Extreme Precipitation Over Nam Co Basin, Tibetan Plateau: A Case Study.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,127(10).
MLA	Zhao, Zhizhan,et al."Effects of Lake Nam Co and Surrounding Terrain on Extreme Precipitation Over Nam Co Basin, Tibetan Plateau: A Case Study".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 127.10(2022).