摘要
TOVAS3B42RT0.25°×0.25°卫星遥感反演降水再分析资料是NASA于2002年2月开始在INTERNET网上提供的一种时空分辨率较高的卫星遥感降水反演资料。采用CRESSMAN插值法,将2003和2004年5～10月的降水反演资料内插到云南125个气象观测站点上,并与测站的降水实况资料进行对比分析。结果表明,TOVAS3B42RT0.25°×0.25°降水再分析资料能较好反映云南全省性、区域性及单站出现的小雨降水天气过程,反演资料具有较好的参考价值;对云南中雨以上量级的降水过程,也具有不同程度的反演能力。总的特点是:随着降水量级的增大,反演效果逐渐减弱,从反演的效果看,降水多的区域,TOVAS的反演能力强,效果较好。
The precipitation reanalysis data which were retrieved by satellite remote sensing （TOVAS 3B42RT 0.25°×0.25°） are a kind of higher spatial and time resolution satellite remote sensing precipitation data which were provided by NASA in the INTERNET from February, 2002. The precipitation from May to October in 2003 and in 2004 were interpolated into 125 stations of Yunnan province by CRESSMAN method and compared with real precipitation data. The results indicated that the TOVAS data can he better to reflect the light rain process of the regional, the whole province and the single station in Yunnan. The retrieving data have better reference value. The TOVAS data also have different retrieving ability to reflect the moderate rain or above weather process. The whole characteristic is that the retrieving effect decreased obviously with precipitation grade increasing. It can he seen from the retrieving effect that the TOVAS retrieving ability is stronger and the retrieving effect is better in the rainy region.
出处
《云南地理环境研究》
2006年第4期100-104,共5页
Yunnan Geographic Environment Research
基金
中国气象局新技术推广项目(CMATG2005M39)
