Validation of TRMM precipitation radar monthly rainfall estimates over Brazil

被引：82

作者：

Franchito, Sergio H. ^{[1
]}

Rao, V. Brahmananda ^{[1
]}

Vasques, Ana C. ^{[1
]}

Santo, Clovis M. E. ^{[1
]}

Conforte, Jorge C. ^{[1
]}

机构：

[1] Inst Nacl Pesquisas Espaciais, Ctr Previsao Tempo & Estudos Climat, BR-12245970 Sao Jose Dos Campos, SP, Brazil

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2009年 / 114卷

关键词：

MEASURING MISSION TRMM; TROPICAL RAINFALL; STOCHASTIC-MODEL; EAST-ASIA; SATELLITE; VARIABILITY; ERROR; PR;

D O I：

10.1029/2007JD009580

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

In an attempt to validate the Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) over Brazil, TRMM PR estimates are compared with rain gauge station data from Agencia Nacional de Energia Eletrica (ANEEL). The analysis is conducted on a seasonal basis and considers five geographic regions with different precipitation regimes. The results showed that TRMM PR seasonal rainfall is well correlated with ANEEL rainfall (correlation coefficients are significant at the 99% confidence level) over most of Brazil. The random and systematic errors of TRMM PR are sensitive to seasonal and regional differences. During December to February and March to May, TRMM PR rainfall is reliable over Brazil. In June to August (September to November) TRMM PR estimates are only reliable in the Amazonian and southern (Amazonian and southeastern) regions. In the other regions the relative RMS errors are larger than 50%, indicating that the random errors are high.

引用

页数：9

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