干旱区陆面过程参数改进对东亚区域气候影响的数值模拟

为了进一步检验裸土参数化的气候模拟性能，本文在文献1，2]的基础上，利用NCEP再分析资料和Xie等全球降水资料与CCM3模拟结果进行了对比。结果表明：加入裸土参数化方案的CCM3能较好地再现冬季东亚和中国地区区域气候的主要特征，模式较原CCM3能更好地模拟地表温度和东亚及中国西北地区的降水，对东亚季风环流的模拟也较接近实际。同时，该方案在CCM3中的加入改进了青藏高原冬季降雪带及夏季高原东南部降水中心的模拟，提高了模式对高原冬夏季降水的模拟能力，从而再次说明利用观测资料对模式参数修正及参数化方法的改进是提高数值模式模拟能力的一个重要途径。

Simulation of the Impact of Improvement of Land Surface Process Parameterization in Arid Region on Regional Climate in East Asia

To further test the simulation performanceof the new LSM bare soil parameterization scheme, we do some comparisons of numerical simulations among CCM3 and CCM3 with the validated land surface process parameters (LCCM3 for short)and observations from NCEP/NCAR and Xie globalPrecipitation data. Compared to the original CCM3, LCCM3 well represent the major feature of some large-scale system except subtropical high over Pacific Ocean, and have better performance in simulating system of Monsoon in East Asia, as well as surface air temperature. At the same time, LCCM3 partly modify the simulations the deviation of precipitation on the east side of Plateau in summer, and improve the simulation of winter snow over Plateau, sea level pressure of Northern Hemisphere in winter, which show it is a very important method to validate parameterizations of land Surface process and improve the land surface process scheme using observations to improve simulations of regional and globalclimate.