Evaluation of the Tropical Rainfall Measuring Mission 3B43 product over an inland area in Brazil and the effects of satellite boost on rainfall estimates

Autor(es)

Curtarelli, Marcelo Pedroso ^[1] ; Renno, Camilo Daleles ^[2] ; Alcantara, Enner Herenio ^[3]

Afiliação do(s) autor(es)

^[1] Natl Inst Space Res, Remote Sensing Div, BR-12227010 Sao Jose Dos Campos - Brazil

^[2] Natl Inst Space Res, Image Proc Div, BR-12227010 Sao Jose Dos Campos - Brazil

^[3] Sao Paulo State Univ, Dept Cartog, BR-19060900 Presidente Prudente - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF APPLIED REMOTE SENSING; v. 8, JUL 18 2014.
• Citações Web of Science: 7

Resumo

The main objective of this study was to evaluate the monthly mean areal rainfall estimated using the Tropical Rainfall Measuring Mission (TRMM) 3B43 version 7 product over an inland area in Central Brazil. Furthermore, we investigated the effect of TRMM orbit boost (in August 2001) over the 3B43 estimates. The TRMM 3B43 estimates were compared to reference rainfall data, collected at 67 rain gauge stations irregularly distributed in the study area. The results showed a good agreement between the TRMM 3B43 areal monthly mean rainfall estimations and reference data (r > 0.97). The error analysis showed that the TRMM 3B43 product tends to overestimate the areal monthly mean rainfall at approximately 1.24%. The root-mean-square error (RMSE) for the entire period was 19.66 mmmonth-1 (15.75%). A Monte Carlo simulation and Wilcoxon statistical test showed that the RMSE increased significantly (p-value < 0.01) after the boost, rising from 15.20 to 23.06 mmmonth-1. However, the increase in the RMSE does not preclude the use of the TRMM 3B43 product for estimating the monthly mean areal rainfall over the Upper Parana watershed. The impacts of boost on TRMM 3B43 estimates were observed only for rainfall rates higher than 250 mmmonth-1. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE) (AU)

• Processo FAPESP: 08/57719-9 - Programa de Mudanças Climáticas - INCT CLIMA
• Beneficiário: Carlos Afonso Nobre
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 10/15075-8 - Estudo numérico da circulação e das características termodinâmicas da água do Reservatório de Itumbiara
• Beneficiário: Enner Herenio de Alcântara
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 07/08103-2 - Estudo da circulação, qualidade da água e uso/ocupação do solo na bacia hidrográfica do Reservatório de Itumbiara
• Beneficiário: José Luiz Stech
• Linha de fomento: Auxílio à Pesquisa - Regular