区域气候模式REMO对东亚季风季节变化的模拟研究

Simulation of Monsoon Seasonal Variation of Regional Climate Model REMO in East Asia

将欧洲区域气候模式REMO首次应用于东亚区域, 利用该模式对 1980 年和 1990 年东亚季风季节变化进行了模拟研究, 并将模拟结果与NCEP再分析资料进行比较, 以检验该模式对东亚季风的模拟能力。研究表明, 区域气候模式REMO能够较好地模拟出东亚地区高、低空的大气环流特征, 模拟的高度场、流场和温度场与NCEP再分析资料场都比较一致。模拟结果显示了东亚季风的月变化和季节转换特征。模拟的降水场与GPCC降水资料的对比结果表明, REMO能较为成功地模拟出东亚地区降水的空间分布, 并能较好地反映降水的季节变化及主要降水趋势, 夏季降水模拟偏大, 整个区域平均的降水量偏差约为18%左右。

For the first time,the regional climate model REMO developed in Europe was used in East Asia. By using this model the regional numerical simulation for the seasonal variation of monsoon over East Asia in 1980 and 1990 was made. Also compared the simulation results for high and low air levels with NCEP re-analysis data to check the simulation ability of REMO for East Asia monsoon. It is found that the features of atmospheric circulation were simulated pretty well by the model. The simulated geopotential height, wind and temperature fields are very close to the observation. It is also successful to simulate the trend of precipitation compared the simulation with the observation data from GPCC, the precipitation simulated is larger than observation in summer and the bias of regional average is about 18%.