中文摘要：

本文利用RegCM3中的BATS陆面模型对青藏高原地区的土壤湿度进行了模拟.结果表明：模式对土壤湿度年循环的模拟与观测较一致,但不同下垫面的土壤湿度模拟结果不同;对植被稀疏地区的土壤湿度模拟夏季偏大冬季较一致,对植被较好地区的土壤湿度模拟冬季偏大夏季较一致;土壤湿度模拟偏差较大的时期对应着降水和温度模拟偏差大的时期.利用后验订正对土壤湿度的订正表明,订正后土壤湿度与观测值的变化比较一致,尤其是对模拟偏差较大时段的订正效果比较明显;订正后的温度和降水基本消除了系统性的偏差.本文认为,订正后的土壤湿度和温度可以为青藏高原地区提供较准确的资料,并在青藏高原多年冻土分布的计算中得到了应用.

英文摘要：

In this paper,the soil moisture is simulated by RegCM3 over the Tibetan Plateau.The obtained results are as follows：（1） The simulated annual cycle of soil moisture is consistent with the observation,but the simulations of soil moisture with different land surface conditions are different.（2） In the area with sparse vegetation,the simulated soil moisture is larger than observation in summer and consistent with that in winter,while in the area with lush vegetation,simulated soil moisture is consistent with observation in summer and larger than that in winter.（3） The larger deviation of simulated soil moisture is corresponding to a large deviation of simulated precipitation and temperature.The soil moisture is revised with revised method,and the results show that the debiations of soil moisture and temperature are reduced.The systematic errors of temperature and precipitation are eliminated after revision.We believe that the revised soil moisture and temperature can provide more accurate data over Tibetan Plateau,and be used to calculate the permafrost distribution.