中文摘要：

通过构建C网格的p-σ九层区域气候模式的差分方案,将C型跳点网格引入p-σ九层区域气候模式。通过对东亚地区1月和7月气候平均场及2003年夏季降水进行数值模拟,检验了C型跳点网格对p-σ九层区域气候模式模拟性能的影响。数值试验结果表明,C型跳点网格的p-σ九层区域气候模式对东亚区域气候的模拟能力有一定的提高,其中包括对流层低层风场和气温场的模拟都有了一定程度的改进,对风场的改进尤为明显。由于风场得到了改进,进而对降水的模拟能力也有所提高,为区域气候模式的进一步发展奠定了基础。

英文摘要：

C grid scheme designed in this paper has been applied to the p-σ nine-level regional climate model,and the impacts of C grid on the p-σ nine-level regional climate model have been studied by simulating the January and July mean climatic fields in East Asia and the rainfall during the summer in 2003.The model results show that the capability of C grid model has been improved,and the improvement of the simulated air temperature and wind in the lower troposphere is more remarkable than in the middle-upper troposphere.The model of C grid can simulate the precipitation in East China much better,and it has a good capability to simulate the rainfall during the summer.The improved simulations of wind field induce the improvement of the capability to simulate the rainfall;this work has established a good base for the further development of the regional climate model.