气候变化领域集成服务门户(CCPortal): Improvements of the coupled WRF-Lake model over Lake Nam Co; Central Tibetan Plateau

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DOI	10.1007/s00382-020-05402-3
	Improvements of the coupled WRF-Lake model over Lake Nam Co; Central Tibetan Plateau
	Wu Y.; Huang A.; Lazhu; Yang X.; Qiu B.; Wen L.; Zhang Z.; Fu Z.; Zhu X.; Zhang X.; Cai S.; Tang Y.
发表日期	2020
ISSN	0930-7575
起始页码	2703
结束页码	2724
卷号	55
英文摘要	A series of model sensitivity simulations are carried out to calibrate and improve the Weather Research and Forecasting Model coupled with a one-dimensional lake model (WRF-Lake) based on observations over Lake Nam Co. Using the default lake model parameters, the solution of WRF-Lake exhibits significant biases in both the lake thermodynamics and regional climatology, i.e., higher lake surface temperature (LST), earlier onset of summer thermal stratification, and overestimated near-surface air temperature and precipitation induced by the lake’s excessive warming and moistening impacts. The performance of WRF-Lake is improved through adjusting the initial lake temperature profile, the temperature of maximum water density (Tdmax), the surface roughness length, and the light extinction coefficient. Results show that initializing the water temperature with spring observation mitigates the LST overestimation and reduces the timing error of the onset of thermal stratification. By further adjusting Tdmax from 4 °C to the observed value of 3.5 °C, the LST increase from June to mid-July is enhanced and the buildup of thermal stratification is more accurately predicted. Through incorporating the parameterized surface roughness length and decreasing the light extinction coefficient, the model better reproduces the observed daily evolution of LST and vertical lake temperature profile. The calibrated WRF-Lake effectively mitigates the overestimation of over-lake air temperature at 2 m height and precipitation over regions downwind the lake. This suggests that an improved lake scheme within the coupled WRF-Lake is essential for realistically simulating the lake–air interactions and the regional climate over the lake-rich Tibetan Plateau. © 2020, The Author(s).
语种	英语
scopus关键词	atmosphere-hydrosphere interaction; climate modeling; computer simulation; lake water; numerical model; regional climate; temperature profile; thermodynamics; weather forecasting; China; Nam Co; Qinghai-Xizang Plateau; Xizang
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/145292
作者单位	CMA-NJU Joint Laboratory for Climate Prediction Studies, School of Atmospheric Sciences, Nanjing University, No. 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China; Key Laboratory of Mesoscale Severe Weather/MOE and School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China; National Tibetan Plateau Data Center, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China; Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, 730000, China
推荐引用方式 GB/T 7714	Wu Y.,Huang A.,Lazhu,et al. Improvements of the coupled WRF-Lake model over Lake Nam Co; Central Tibetan Plateau[J],2020,55.
APA	Wu Y..,Huang A..,Lazhu.,Yang X..,Qiu B..,...&Tang Y..(2020).Improvements of the coupled WRF-Lake model over Lake Nam Co; Central Tibetan Plateau.Climate Dynamics,55.
MLA	Wu Y.,et al."Improvements of the coupled WRF-Lake model over Lake Nam Co; Central Tibetan Plateau".Climate Dynamics 55(2020).