Voltar
Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Validation of TRMM precipitation radar monthly rainfall estimates over Brazil

2009; American Geophysical Union; Volume: 114; Issue: D2 Linguagem: Inglês

10.1029/2007jd009580

ISSN

2156-2202

Autores

Sérgio H. Franchito, V. Brahmananda Rao, Ana Carolina Vasques, Clovis M. E. Santo, Jorge Conrado Conforte,

Tópico(s)

Meteorological Phenomena and Simulations

Resumo

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 Agência Nacional de Energia Elétrica (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.

Referência(s)