1998年东亚夏季风降水的模拟

Simulation to the east Asian summer monsoon precipitation in 1998

摘要:

利用改进后的p-9层混合坐标系模式,采用不同的土壤温度与太阳短波辐射参数化方案,对1998年夏季风降水进行模拟,发现改进的土壤温度计算法和改进的Lacis和Hansen(NEW)短波辐射参数化方法相结合能较好地模拟降水。利用不同的统计方法对模拟结果进行统计检验发现,土壤温度对降水的显著性影响主要体现在降水场的空间分布。通过与实测降水的比较,发现该模式对有些时段的降水模拟得较好,对有些时段的降水特别是对强降水过程模拟较差,降水量普遍偏小。

Abstract:

Summer monsoon precipitation in 1998 is simulated with different soil temperature and solar short wave radiation parameterization schemes using the improved p-nine level hybrid coordinate model.It is found that the improved soil temperature calculation method together with Lacis and Hansen short wave radiation parameterization has a good simulation for precipitation.Statistical test is also made,indicating that the soil temperature has great impact on the precipitation distribution.Compared with the observed field,this model simulated the precipitation better in some periods,while worse in other periods,such as for the strong precipitation process.