摘要
利用国家气候中心全球T63海气耦合模式嵌套区域气候模式(RegCM_NCC),对1998—2007年华东地区夏季进行了10年夏季季节回报试验。结果表明:模式总体能够反映华东地区的温度和降水分布情况,有些年份的模拟和实际相当接近,总体优于T63模式模拟结果,但模式对华东南部的温度和降水模拟能力有待提高。初始积分时间、模式范围、时间积分步长及水平分辨率对模式模拟结果均有较大影响,适当减小模式积分步长,扩大预测范围并包含青藏高原,提高模式水平分辨率可以提高模式对华东地区夏季的温度和降水趋势的模拟效果;而对于夏季的模拟,采用时间上更早的初始场似乎更适合华东地区。
10-year（1998--2007） hindcasting experiments over the East China are presented by using the regional climate model （RegCM-NCC） that is nested with T63 global atmosphere-ocean coupled model of National Climate Center/AMS. The results demonstrate that RegCM-NCC can roughly reproduce the averaged summertime surface temperature and total precipitation over the East China, and its performance is better than those of T63 global model of National Climate Center in spite of that over the south of East China remains to be improved. Also the model can give rather real the surface temperature departure and precipitation over the East China in some years of 1998--2007. Based on the sensitive experiments, the Ps skill scores of the model can be improved, to some extent, through reducing the model integration step, enlarging its horizontal resolution and its domain covering the Tibetan Plateau. As far as the summertime integration is concerned, The earlier initial time （February 1） in comparison to March 1 and April 1, seems to be suitable the most for the East China.
出处
《高原气象》
CSCD
北大核心
2008年第B12期32-41,共10页
Plateau Meteorology
基金
上海市气象局2007科技开发项目“区域气候模式联合研发与业务试验”资助
关键词
区域气候模式
夏季回报试验
Ps评分
温度距平
降水距平百分率
Regional climate model
Summertime departure
Percentage of precipitation hindcast over East China
Ps skill
Temperature departure
