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dc.contributor.authorGusso, Aníbalpt_BR
dc.contributor.authorDucati, Jorge Ricardopt_BR
dc.contributor.authorVeronez, Maurício Robertopt_BR
dc.contributor.authorSommer, Victorpt_BR
dc.contributor.authorSilveira Junior, Luiz Gonzaga dapt_BR
dc.date.accessioned2014-07-02T02:06:51Zpt_BR
dc.date.issued2014pt_BR
dc.identifier.issn2156-8561pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/97117pt_BR
dc.description.abstractPeriods in the soybean summer cycle that are sensitive to the occurrence of high temperatures were studied. An analysis was performed on the variability of soybean yields associated with crop canopy temperatures during key development periods. A land surface temperature (LST) data series from MODIS (Moderate Resolution Imaging Spectroradiometer) on the Aqua satellite was processed between 2003 and 2012 that covered the entire state of Rio Grande do Sul, in Brazil. Enhanced vegetation index (EVI) data from MODIS on the Terra satellite were used to monitor the LST during different phenological stages. Spatially interpolated maps of soybean yield distributions were generated using data obtained from Instituto Brasileiro de Geografia e Estatística (IBGE) at state and municipality levels. The results indicate that canopy-LST occurrence in mid-February, during the grain filling, is most correlated to yield reduction (R2 = 0.82 and RMSD = 14.4%). At the state level, the average yield is 2003 kg∙ha−1 with a standard deviation of 308 kg∙ha−1. The overall average of the canopy-LST is 305.0 K (31.8˚C) with a standard deviation of 1.9 K. The slope of the downward linear relationship between canopy-LST and yield was −28.7%. These results indicate that monitoring heat wave events can provide important information for characterising agriculture vulnerability.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAgricultural sciences. Irvine. Vol. 5, n. 4 (Mar. 2014), p. 353-364pt_BR
dc.rightsOpen Accessen
dc.subjectSensoriamento remotopt_BR
dc.subjectLand surface temperatureen
dc.subjectSoybeanen
dc.subjectImagens de satelitept_BR
dc.subjectRemote sensingen
dc.subjectModerate Resolution Imaging Spectroradiometer (MODIS)pt_BR
dc.subjectTemperatura do arpt_BR
dc.subjectCanopyen
dc.subjectProdutividade agrícolapt_BR
dc.subjectVegetation Indexen
dc.subjectSojapt_BR
dc.subjectRio Grande do Sulpt_BR
dc.titleMonitoring heat waves and their impacts on summer crop development in southern Brazilpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000918379pt_BR
dc.type.originEstrangeiropt_BR


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