Variações temporais do equivalente à altura d'água obtidas da Missão Grace e da altura d'água in-situ nos rios da bacia Amazônica

dc.creatorAlmeida, Flavio Guilherme Vaz de
dc.creatorCalmant, Stephane
dc.creatorSeyler, Frédérique
dc.creatorRamillien, Guillaume
dc.creatorBlitzkow, Denizar
dc.creatorMatos, Ana Cristina Cancoro
dc.creatorSilva, Joecila Santos
dc.date.accessioned2013-11-04T12:03:21Z
dc.date.accessioned2018-07-04T16:32:05Z
dc.date.available2013-11-04T12:03:21Z
dc.date.available2018-07-04T16:32:05Z
dc.date.created2013-11-04T12:03:21Z
dc.date.issued2012
dc.identifierActa Amaz.,v.42,n.1,p.125-134,2012
dc.identifier0044-5967
dc.identifierhttp://www.producao.usp.br/handle/BDPI/38315
dc.identifier10.1590/S0044-59672012000100015
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672012000100015&lng=en&nrm=iso&tlng=en
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_abstract&pid=S0044-59672012000100015&lng=en&nrm=iso&tlng=en
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_pdf&pid=S0044-59672012000100015&lng=en&nrm=iso&tlng=en
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1636912
dc.description.abstractGravity Recovery and Climate Experiment (GRACE) mission is dedicated to measuring temporal variations of the Earth's gravity field. In this study, the Stokes coefficients made available by Groupe de Recherche en Géodésie Spatiale (GRGS) at a 10-day interval were converted into equivalent water height (EWH) for a ~4-year period in the Amazon basin (from July-2002 to May-2006). The seasonal amplitudes of EWH signal are the largest on the surface of Earth and reach ~ 1250mm at that basin's center. Error budget represents ~130 mm of EWH, including formal errors on Stokes coefficient, leakage errors (12 ~ 21 mm) and spectrum truncation (10 ~ 15 mm). Comparison between in situ river level time series measured at 233 ground-based hydrometric stations (HS) in the Amazon basin and vertically-integrated EWH derived from GRACE is carried out in this paper. Although EWH and HS measure different water bodies, in most of the cases a high correlation (up to ~80%) is detected between the HS series and EWH series at the same site. This correlation allows adjusting linear relationships between in situ and GRACE-based series for the major tributaries of the Amazon river. The regression coefficients decrease from up to down stream along the rivers reaching the theoretical value 1 at the Amazon's mouth in the Atlantic Ocean. The variation of the regression coefficients versus the distance from estuary is analysed for the largest rivers in the basin. In a second step, a classification of the proportionality between in situ and GRACE time-series is proposed.
dc.languageeng
dc.publisherInstituto Nacional de Pesquisas da Amazônia
dc.relationActa Amazonica
dc.rightsopenAccess
dc.subjectSpatial geodesy
dc.subjecthydrology
dc.subjectGRACE satellite
dc.subjectAmazon Basin
dc.subjectGeodesia Espacial
dc.subjectHidrologia
dc.subjectSatélite GRACE
dc.subjectBacia Amazônica
dc.titleTime-variations of equivalent water heights'from Grace Mission and in-situ river stages in the Amazon basin
dc.titleVariações temporais do equivalente à altura d'água obtidas da Missão Grace e da altura d'água in-situ nos rios da bacia Amazônica
dc.typeArtículos de revistas


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