CLM3-simulated soil moisture in East Asia and its possible response to global warming during 1979 through 2003

作     者：ChuanLi Du XiaoDong Liu WanLi Wu 

作者机构：State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’anShaanxi 710075China. Shaanxi Provincial Meteorological InstituteXi’anShaanxi 710014China. National Center for Atmospheric ResearchBoulderColorado 80307USA. 

出 版 物：《Research in Cold and Arid Regions》 (寒旱区科学(英文版))

年 卷 期：2009年第1卷第1期

页      面：51-58页

学科分类：07[理学] 0705[理学-地理学] 0706[理学-大气科学] 

基　　金：supported by the NSFC National Excellent Young Scientists Fund (40825008) MOST Special Fund for Nonprofit Organizations (GYHY200706029) for State Key Laboratory (LQ0701) Program for Construction of Infrastructure of National S&T Conditions (2006DKA32300) 

主　　题：land surface model East Asia soil moisture global warming 

摘      要：Hydrological processes related to soil moisture play an important role in determining regional and global climate. In this study, using a state-of-art Community Land Model (CLM) developed by the National Center for Atmospheric Research (NCAR), we simulated soil moisture in East Asia and its possible response to global warming through a long off-line experiment under 0.5° (longitude) × 0.5° (latitude) resolution and real atmospheric forcing of the National Center for Environmental Protection/ Department of Energy (NCEP/DOE) reanalysis during 1979 through 2003. The 25-year simulation is examined and compared with limited observations. The results can be summarized as follows: (1) Soil moisture takes time in response to the atmospheric forcing. The equilibration time depends on the depth of the soil and is as much as 20 years in deep layers (1.5 m); (2) In comparison with observations, the CLM reasonably reproduces the seasonal and inter-annual variability, spatial structure, and vertical pattern of soil moisture in East Asia; (3) The soil tends to be drier in the past 25 years in northeastern Asia—including northern China north of 30°N—while wetter in the southern China and the Tibetan Plateau, especially in summer. Our analysis shows that the regional drying is attributed to increase of the land-surface evaporation induced by global warming.