ＣＬＭ３０对中国区域陆面过程的模拟试验 及评估Ⅱ：土壤湿度

利用NCAR公用陆面模式（Community Land Model 3.0，CLM3.0）及普林斯顿大学1948—2001年1°×1°、3 h一次的全球大气近地面强迫资料，对中国地区1948-2001年的土壤温度进行了off-line模拟试验，通过对模拟结果和全国台站观测土壤温度资料的对比，评估了CLM3.0对中国区域不同层次土壤温度的模拟能力。结果表明：模式能模拟出中国地区多年平均土壤温度的空间分布型，除部分地区模拟比观测偏高外，模式模拟的土壤温度普遍偏低；模式能较好地反映出中国地区土壤温度的年际变化，对4月的模拟稍好于7月。对于划分的8个子区域，东部区域模拟好于其它各区，除高原一带外，表层的模拟均好于深层；模式基本能抓住土壤温度的变化趋势，而且模拟出了7月长江流域以南地区土壤温度显著降低这一趋势，但模拟的趋势比观测有所偏弱。

Simulation of land surface processes over China and its validation PartⅠ:Soil temperature

Using the Community Land Model (CLM3.0) of NCAR and the global 1°×1° and 3h atmospheric external forcing data from 1948 to 2001 of Princeton University, an off-line simulation is conducted on the soil temperature in China from 1948 to 2001. Through comparing the simulation results and the national observation data from stations, we evaluate the capability of CLM 3.0 to simulate the soil temperature in different layers in China. Results show that:CLM3.0 can simulate the spatial distribution of annual average soil temperature in China, but the simulated soil temperature is generally lower than the observational values except a few regions. CLM3.0 can reasonably reflect the inter-annual variation of soil temperature, and the simulation in April is better than that in July. For the eight selected sub-regions, the simulation in eastern China is better than that in other regions, and the simulation in the shallow layers is better than that in the deep layers except in the Tibetan Plateau area. The CLM3.0 can basically reflect the tendency of the soil temperature change. It has been found that the decreasing trend of the soil temperature in regions south to the Yangtze River Basin was significant, but it was not as distinct as observation.