摘要
美国国家环境预报中心 (NCEP)和国家大气中心 (NCAR)的全球再分析资料 ,在很多气候模拟和预测研究中都被作为区域气候模式的驱动场和初始场资料 ,并用来检验模拟结果的。作者通过对NCEP的 2种再分析资料NCEPI和NCEPII与中国台站观测资料的月平均温度和月降水总量进行相互插值 ,分析和比较了NCEPI、NCEPII再分析值与中国区域内观测值之间的差异以及 2种再分析资料之间的差异。从结果可以看到 ,NCEP再分析资料的月平均温度较观测值普遍偏低 ,而月降水总量较观测值则偏高 ;就季节变化而言 ,NCEP再分析值在夏季和年平均模拟的较好 ,冬季较差。同时可以看到 ,在温度和降水方面NCEPII较NCEPI都有所改进 ,尤其在中国东部地区 ,改进较为明显。
The NCEP reanalysis data is widely used in climate change simulation and prediction research as climate model driver or initial data. An intercomparison and analysis by interpolation is made between the two types of NCEP reanalysis dataset (NCEPI and NCEPII) and station observed monthly land surface mean temperature and precipitation data over China during the period 1989～1998. Through this comparison, some differences existed between the NCEP and the observed data can be identified. Comparison with the observed data, the monthly mean temperature of the NCEP data is lower than the observed data, but the monthly total precipitation overestimates generally. The simulation of the NCEP dataset is better in summer than in winter, at the same time, some improvements of NCEPII from NCEPI can be aware of in east of China, especially in temperature.
出处
《气候与环境研究》
CSCD
2004年第2期278-294,共17页
Climatic and Environmental Research
基金
国家重点基础研究发展规划项目G1 990 40 3 40 3
中国科学院知识创新工程重点方向项目KZCX3 SW 2 1 8
国家自然科学基金项目 40 2 3 1 0 0 6共同资助
