Monitoring volcanic thermal anomalies from space: Size matters

dc.creatorMurphy, SW
dc.creatorde Souza, CR
dc.creatorOppenheimer, C
dc.date2011
dc.date37043
dc.date2014-07-30T14:03:53Z
dc.date2015-11-26T16:46:16Z
dc.date2014-07-30T14:03:53Z
dc.date2015-11-26T16:46:16Z
dc.date.accessioned2018-03-28T23:32:04Z
dc.date.available2018-03-28T23:32:04Z
dc.identifierJournal Of Volcanology And Geothermal Research. Elsevier Science Bv, v. 203, n. 41671, n. 48, n. 61, 2011.
dc.identifier0377-0273
dc.identifierWOS:000292066900005
dc.identifier10.1016/j.jvolgeores.2011.04.008
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/57858
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/57858
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1274465
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionMeasuring temperatures on volcanoes from space provides important constraints on the transfer of mass and heat to the Earth's surface. Time series of multispectral infrared images, acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) between 2000 and 2009, were inspected to investigate fluctuations in thermal anomalies at both Mount Erebus (Antarctica) and Lascar volcano (Chile). Several thermal metrics were explored: i) maximum pixel temperatures above background, ii) the spatial extent of low, moderate and high temperature anomalies, and iii) the spatial extent of short-wave infrared anomalies. The maximum pixel temperature metric correlated to eruptive events at Lascar volcano yet displayed significant scatter at Erebus. The spatial extent of both temperature and short-wave infrared anomalies correlates well with eruptive activity at both volcanoes. Limited variation in the size of thermal anomalies was observed at Erebus throughout the time series due to the stability of a long-lived lava lake, with the exception of a seasonal expansion in low temperature anomalies associated with localized snow-melt at the peak. This finding has implications for the interpretation of low temperature anomalies at other volcanoes. At least two different types of precursory signals are identified at Lascar: i) a gradual increase and ii) a dip, in the size and intensity of thermal anomalies. These thermal precursors appear to be associated with different eruptive styles. The former precedes a relatively shallow, short lived eruption; the later a prolonged eruptive period. Such thermal precursors could therefore help to constrain not only the timing but also the style and duration of an imminent eruptive episode. (C) 2011 Elsevier B.V. All rights reserved.
dc.description203
dc.description41671
dc.description48
dc.description61
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationJournal Of Volcanology And Geothermal Research
dc.relationJ. Volcanol. Geotherm. Res.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectvolcano
dc.subjectmonitoring
dc.subjectASTER
dc.subjectLascar
dc.subjectErebus
dc.subjectLascar Volcano
dc.subjectMount Erebus
dc.subjectEruptive History
dc.subjectNorthern Chile
dc.subjectLava Lake
dc.subjectAntarctica
dc.subjectAster
dc.subjectBezymianny
dc.subjectEvolution
dc.subjectFeatures
dc.titleMonitoring volcanic thermal anomalies from space: Size matters
dc.typeArtículos de revistas


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