Data/hora: 21/06/2024 22:38:46

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 25/02/2010
Data da última atualização: | 22/07/2014
Autoria: | DANTAS, M. S.; ROSA, R. R.; CALHEIROS, D. F.; VERONESE, T. B.; LIMA, I. B. T. de; HAMILTON, S.
Afiliação: | Murilo da Silva Dantas, INPE; Reinaldo Roberto Rosa, INPE; DEBORA FERNANDES CALHEIROS, CPAP; Thalita Biazzuz Veronese, INPE; IVAN BERGIER TAVARES DE LIMA, CPAP; Stephen Hamilton, Michigan State University.
Título: | Análise espectral de dados SMMR para estudo de padrões de Inundação do Pantanal.
Ano de publicação: | 2009
Fonte/Imprenta: | In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 14., 2009, Natal. Anais... São José dos Campos: INPE, 2009.
Páginas: | p. 4701- 4706
Idioma: | Português
Conteúdo: | Inundation seasonal patterns are important in the understanding of tropical floodplain ecosystems dynamics. In this study, we have analyzed data derived from 37-GHz polarization differences observed by the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR). The passive microwave observations, for 10 Pantanal subregioes, provide an robust signature of inundation dynamics in large wetlands such as the Pantanal. The time series was obtained taking into account the differences between vertically and horizontally polarized brightness temperatures providing a sensitive indicator of the surface water against a vegetation land surface background. Each time series was analyzed by applying the gradient pattern analysis on a multiresolution representation obtained from wavelet decomposition /reconstrution technique. The main result have shown similar variability patterns for the following groups of subregions: (i) Miranda and Piquiri; (ii) Negro and Nhecolandia; (iii) Corixo, Paraguay, Cuiabá and Taquari fan; and (iv) Taquari river and Nabileque. Some hydrological aspects are discussed in order to understand the clusterization found from our results.
Palavras-Chave: | análise de padrões-gradiente; padrçoes de inundação; varredura multi-canal em microondas.
Thesaurus Nal: | Pantanal; wavelet.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/105241/1/57195.pdf
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (57195-1) - UPC - AA - -- - SP17121 -  - 17121 - DIS