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《Plateau Meteorology》 2014-02
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Influence of Soil Moisture Transmission Scheme Improvement in CLM4.0 on Simulation of Land Surface Process in Qinghai-Xizang Plateau

XIONG Jiansheng;ZHANG Yu;WANG Shaoying;SHANG Lunyu;CHEN Yungang;SHEN Xiaoyan;Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions,Cold and Arid Regions Environment Research Institute,Chinese Academy of Science;University of Chinese Academy of Sciences;  
Using the Community Land Model version 4.0(CLM4.0) and the observed meteorological data at Maqu station in the Qinghai-Xizang Plateau from 25 May to 31 December 2010 as the forcing data,several simulation experiments have been done.After evaluating the model simulation performance,the model sensitivity to the sand content and the effect of soil moisture transmission scheme improvement on the simulation of land surface process in the Qinghai-Xizang Plateau,it is found that the model can reflect the variation trend of soil temperature and moisture,surface radiation,turbulance energy at Maqu station,but the simulated soil temperature is low and sensible heat flux is too large.The increase of the sand content will decrease the water holding capacity of soil,which leads to the sensible heat flux increasing and latent heat flux decreasing in summer.The organic matters added in CLM4.0 have an important influence on the simulation of both soil temperature and moisture,however,the modified Richards equation and runoff parameters affect much more the simulation of soil moisture,which is a guide to the improvement of other land surface models.
【Fund】: 公益性行业专项(GYHY201306020 GYHY201106022);; 国家自然科学基金项目(41205006 41275016);; 中国科学院寒区旱区环境与工程研究所青年人才成长基金(51Y351181)
【CateGory Index】: P404
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