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A remote sensing derived upper ocean heat content dataset for the equatorial atlantic: comparison with pirata project data

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      Abstract

      In this work, nine years (1998-2006) of Sea Level Anomalies (SLA) from multimission altimeter data distributed by Archiving Validation and Interpretation of Satellite Data in Oceanography (AVISO) were combined with Sea Surface Temperature (SST) data from the TRMM Microwave Imager and climatological subsurface data from World Ocean Atlas 2001 (VVOA01) through a reduced gravity model, as well as a statistical model, to generate maps of Upper Layer Heat content (ULH) for the Equatorial Atlantic. In order to validate the ULH estimates, we perform a comparison with an independent in situ data from Prediction and Research Moored Array in the Tropical Atlantic (PIRATA). There is a very good match between the ULH anomalies derived from remote sensing and from PIRATA moorings. The best correlations are for the northwest Equatorial Atlantic PIRATA buoys, while the worst correlations are for the southeastern Equatorial Atlantic sites. We believe that using the most recent World Ocean Atlas 2009 (WOA09), which already incorporates the PIRATA dataset, could further improve the present method.

      Translated abstract

      Neste trabalho, nove anos (1998-2006) de dados de anomalias de elevação da superfície do mar, oriundos da integração de vários altímetros e distribuídos pela Archiving Validation and Interpretation of Satellite Data in Oceanography (AVISO), dados de temperatura da superfície do mar provenientes do sensor TRMM Microwave Imager, assim como dados climatológicos do World Ocean Atlas 2001 (WOA01) são combinados através de um modelo de gravidade reduzida, assim como um modelo estatístico, para a geração de mapas do conteúdo de calor na camada superior do oceano para o Atlântico Equatorial. A fim de validar os dados de conteúdo de calor, realizamos uma comparação com dados independentes in situ do Prediction and Research Moored Array in the Tropical Atlantic (PIRATA). Há uma concordância muito boa entre as anomalias de calor na camada superior do oceano derivadas a partir dos dados de sensoriamento remoto e obtidas a partir das bóias do PIRATA. As melhores correlações ocorrem para as bóias localizadas no Atlântico Equatorial Noroeste, enquanto que as piores correlações ocorrem para as bóias localizadas no Atlântico Equatorial Sudeste. Acredita-se que a utilização do mais recente conjunto de dados do World Ocean Atlas 2009 (WOA09), que incorpora os dados das bóias PIRATA, poderia melhorar ainda mais o presente método.

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      Most cited references 13

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      Relations between sea level, thermocline depth, heat content, and dynamic height in the tropical Pacific Ocean

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        Long-period ocean heat storage rates and basin-scale heat fluxes from TOPEX

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          Characterization and validation of the heat storage variability from TOPEX/Poseidon at four oceanographic sites

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            Author and article information

            Affiliations
            [1 ] Universidade Federal do Rio de Janeiro Brazil
            [2 ] Tropical Oceanography Group
            [3 ] Universidade Federal da Bahia Brazil
            Contributors
            Role: ND
            Role: ND
            Journal
            rbg
            Revista Brasileira de Geofísica
            Rev. Bras. Geof.
            Sociedade Brasileira de Geofísica (São Paulo )
            0102-261X
            March 2011
            : 29
            : 1
            : 43-56
            S0102-261X2011000100003 10.1590/S0102-261X2011000100003

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

            Product
            Product Information: SciELO Brazil
            Categories
            GEOCHEMISTRY & GEOPHYSICS
            GEOSCIENCES, MULTIDISCIPLINARY

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