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      ANÁLISES ESPECTRAIS DA VEGETAÇÃO COM DADOS HYPERION E SUA RELAÇÃO COM A CONCENTRAÇÃO E O FLUXO DE CO2 EM DIFERENTES AMBIENTES NA AMAZÔNIA BRASILEIRA Translated title: Spectral analysis of vegetation with Hyperion data and his relationship with the concentration and the flux of CO2 in different environments in the Brazilian Amazon

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          Abstract

          A modelagem espectral é uma das ferramentas importantes para a determinação de estimativa de parâmetros biofísicos de um local. Correlacionar a concentração e o fluxo de dióxido de carbono, por meio de medições indiretas é um grande avanço na área das geociências. A metodologia desenvolvida para o sequestro florestal de carbono CO2flux, CO2fluxEVI e CO2fluxEVI2, a partir do sensor Hyperion envolveu ambientes naturais e antrópicos, tornando-o eficaz quando associada à variabilidade de ecótipos existentes na Amazônia Brasileira. Resultados desse estudo apontaram que os índices NDVI, EVI e EVI2 podem compor a estrutura do índice de sequestro florestal de carbono, CO2flux. Entretanto, fez-se necessário avaliar a potencialidade e comparação dos índices em relação à detecção do sequestro florestal de carbono, associado as medições diretas de CO2 nas torres micrometeorológicas. Após o processamento das imagens hiperespectrais e análises estatísticas dos índices sugeridos pôde-se inferir que o CO2flux com a utilização do NDVI tem melhor ajustamento, quando associado aos dados de concentração de CO2 (ppm) medidos no topo das torres, e com os dados de fluxo (mol.m-2.s-1), uma vez que as correlações possuem similaridades e são estatisticamente significativos com os dados do sensor Hyperion.

          Translated abstract

          The spectral modeling is one of the important tools for determining biophysical parameters estimation of a location. Correlate the concentration and carbon dioxide flux through indirect measurements is a large advance in the field of geosciences. The methodology developed for forest carbon sink CO2flux, CO2fluxEVI and CO2fluxEVI2 from Hyperion involving natural and anthropic environments, making it effective when associated with variety of ecotypes existing in the Brazilian Amazon. Results of this study showed that NDVI indices, EVI and EVI2 could compose the rate structure of the forest sink of carbon, CO2flux. However, it was necessary to evaluate the potential and comparison of ratios in relation to detection of forest carbon sink associated to the direct measurements of CO2 in micrometeorological towers. After processing the hyperspectral imaging and statistical analysis of the suggested ratios, it could be inferred that CO2flux has a better adjustment when using NDVI, when associated to CO2 (ppm) concentration data measured from the top of the towers, as well as the data flux (mol.m-2.s-1), since the correlations have similarities and are statistically significant at the Hyperion data.

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          Most cited references23

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          A soil-adjusted vegetation index (SAVI)

          A.R Huete (1988)
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            • Record: found
            • Abstract: not found
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            On the relation between NDVI, fractional vegetation cover, and leaf area index

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              • Record: found
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              Accuracy of the AVHRR vegetation index as a predictor of biomass, primary productivity and net CO2 flux

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                bcg
                Boletim de Ciências Geodésicas
                Bol. Ciênc. Geod.
                Universidade Federal do Paraná (Curitiba )
                1982-2170
                June 2015
                : 21
                : 2
                : 354-370
                Affiliations
                [1 ] Universidade de Brasília Brazil
                Article
                S1982-21702015000200354
                10.1590/S1982-21702015000200020
                494583b2-a3d5-4873-a554-bfeca7e662aa

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1982-2170&lng=en
                Categories
                GEOCHEMISTRY & GEOPHYSICS
                REMOTE SENSING

                Remote sensing,Geophysics
                hyperspectral image,forest sink of carbon,micrometeorological towers.,imagem hiperespectral,sequestro florestal de carbono,torres micrometeorológicas.

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