PRECIS水平分辨率对宁夏气候模拟影响的试验  

Experiment of the Influence of PRECIS Horizontal Resolution on Climate Simulation Sensitivity in Ningxia

作　　者：徐宾[1,2] 许吟隆[1] 

机构地区：[1]中国农业科学院农业环境与可持续发展研究所农业部农业环境与气候变化重点开放实验室,北京100081 [2]中国气象局国家气象信息中心气象资料室,北京100081

出　　处：《高原气象》2009年第2期440-445,共6页Plateau Meteorology

基　　金：中英气候变化项目(二期);国家“十五”科技攻关课题(2004BA611B02);国家“十一五”科技支撑计划课题(2007BAC03A02)共同资助

摘　　要：利用1979-1993年ECMWF再分析数据驱动区域气候模式系统PRECIS,分析设置水平网格距为50 km和25 km时对PRECIS模拟宁夏气候效果的影响。模拟结果表明:PRECIS在两种分辨率下能较好地模拟宁夏地区的逐月平均温度和降水的时间序列分布特征,以及逐日温度和逐日降水发生频率的分布特征。当PRECIS分辨率为25 km时,PRECIS对宁夏地区月平均气温、降水的模拟和日气温与日降水发生频率分布特征的模拟与实况更加吻合,而且对0℃附近温度和极端降水与极端气温模拟的效果明显改善。ECMWF reanalysis data in 1979--1993 was drive PRECIS at 25 km and 50 km horizontal resolutions employed as quasi-observational boundaries to to investigate the sensitivity of PRECIS＇ climate simulation to different horizontal resolutions in Ningxia. It is found that monthly mean temperature and precipitation and the frequency distribution of daily temperature and precipitation could be well simulated at the two horizontal resolutions by PRECIS; but when the PRECIS was set up in 25 km resolution, the PRECIS simulated monthly and daily temperature and precipitation would be much closer with observation, especially for the simulated temperature near 0℃, as well as the extreme precipitation and extreme hot temperature.

关 键 词：水平分辨率 PRECIS ECMWF 再分析数据 

分 类 号：P456.7[天文地球—大气科学及气象学]