Monitoring carbon assimilation in South America's tropical forests: Model specification and application to the Amazonian droughts of 2005 and 2010

dc.creatorNunes, EL
dc.creatorCosta, MH
dc.creatorMalhado, ACM
dc.creatorDias, LCP
dc.creatorVieira, SA
dc.creatorPinto, LB
dc.creatorLadle, RJ
dc.date2012
dc.dateFEB 15
dc.date2014-07-30T14:03:51Z
dc.date2015-11-26T17:41:32Z
dc.date2014-07-30T14:03:51Z
dc.date2015-11-26T17:41:32Z
dc.date.accessioned2018-03-29T00:23:20Z
dc.date.available2018-03-29T00:23:20Z
dc.identifierRemote Sensing Of Environment. Elsevier Science Inc, v. 117, n. 449, n. 463, 2012.
dc.identifier0034-4257
dc.identifierWOS:000300459300038
dc.identifier10.1016/j.rse.2011.10.022
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/57840
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/57840
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1287037
dc.descriptionNet primary production (NPP) is a key variable for monitoring and understanding the impacts of environmental change on ecosystems and for generating realistic global and regional carbon budgets. In this paper we present a regional algorithm (RATE) for automatically monitoring the rate of carbon fixation (as measured by NPP) of tropical forests in South America. The algorithm is based on a modification of the SITE ecosystem model and uses data obtained from the procedures for aggregation and correction of data from the MOD12Q1 and MOD15A2 products and meteorological data from the National Centers for Environmental Prediction (NCEP). A correction procedure for the MOD15A2 Leaf area index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) used by the RATE algorithm produced satisfactory LAI and FAPAR estimates when compared against observed values. The algorithm was successfully validated in eight field sites from two types of tropical forests in South America (Amazon rainforest and the Atlantic forest), producing an average error of only 4.72%. When applied to Amazonia, RATE indicates that NPP showed little variation in the 2005 and 2010 drought years (NPP = 1.28 kg-C m(-2) year(-1)) in comparison to non-drought years (NPP = 1.31 kg-C m(-2) year RATE also provides some limited evidence for small decreasing trends in Amazonia carbon assimilation during the period 2001-2010. (C) 2011 Elsevier Inc. All rights reserved.
dc.description117
dc.description449
dc.description463
dc.descriptionNASA
dc.descriptionLBA (Large Scale Biosphere-Atmosphere Experiment in Amazonia)
dc.descriptionAracruz Celulose SA
dc.languageen
dc.publisherElsevier Science Inc
dc.publisherNew York
dc.publisherEUA
dc.relationRemote Sensing Of Environment
dc.relationRemote Sens. Environ.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectRate of carbon fixation
dc.subjectNet primary production
dc.subjectModeling
dc.subjectTropical forests
dc.subjectTropical ecosystems
dc.subjectNet Primary Production
dc.subjectLeaf-area Index
dc.subjectLand-cover
dc.subjectData Set
dc.subjectModis
dc.subjectFluxes
dc.subjectProject
dc.subjectWater
dc.subjectGross
dc.titleMonitoring carbon assimilation in South America's tropical forests: Model specification and application to the Amazonian droughts of 2005 and 2010
dc.typeArtículos de revistas


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