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dc.contributor.authorGoyanes, Gabriel Alejandro-
dc.contributor.authorVieira, Gonçalo-
dc.contributor.authorCaselli, Alberto Tomás-
dc.contributor.authorCardoso, M.-
dc.contributor.authorMarmy, Antoine-
dc.contributor.authorSantos, Fernanda-
dc.contributor.authorBernardo, Ivo-
dc.contributor.authorHauck, Christian-
dc.date.accessioned2020-08-12T12:46:22Z-
dc.date.available2020-08-12T12:46:22Z-
dc.date.issued2014-04-07-
dc.identifier.citationGoyanes, Gabriel Alejandro., Vieira, G., Caselli, Alberto Tomás., Cardoso, M., Marmy, A. and et al. (2014) Local influences of geothermal anomalies on permafrost distribution in an active volcanic island (Deception Island, Antarctica). Elsevier Science; Geomorphology; 225; 57-68es_ES
dc.identifier.issn0169-555Xes_ES
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0169555X14001950?via%3Dihub#!-
dc.identifier.urihttp://rid.unrn.edu.ar/handle/20.500.12049/5587-
dc.description.abstractThis study aims at understanding the spatial distribution and characteristics of the frozen and unfrozen terrain in an alluvial fan on Deception Island, which is an active strato-volcano located in the Bransfield Strait (South Shetland Islands) with recent eruptions in 1967, 1969 and 1970. The alluvial fan is dominated by debris-flow, run-off and rock fall processes and permafrost occurs in several parts in the vicinity of anomalous geothermal heat flux. The aim is to assess the ways volcanic activity controls permafrost development and associated geomorphic dynamics using shallow subsurface, surface and air temperature measurements as well as thaw depth and electrical resistivity tomography (ERT) surveys.Results show a temperature increase with depth in the lower part of the fan reaching 13. °C at 0.80. m depth, without the presence of permafrost. The shallow borehole located at this site showed a stable thermal stratification all year-round, with only the upper 0.20. m reacting to meteorological forcing. In the upper part of the alluvial fan and debris cones, c. 100. m from the coast, frozen ground is present at c. 0.70. m depth. There, the shallow borehole shows a good coupling with air temperatures and the thermal regime favours the presence of permafrost. ERT shows the lowest resistivity values in the lower part of the alluvial fan and a highly resistivity zone in the upper sector of the fan and in the debris cones. These large variations in resistivity mark the presence of a saline water wedge from the sea into the fan, reaching frozen ground conditions about 100. m inland. It can be shown that the volcano-hydrothermal activity only inhibits frost development very locally, with frozen ground conditions occurring about 100. m away.es_ES
dc.format.extentp. 57-68es_ES
dc.format.mediumdigitales_ES
dc.language.isoenes_ES
dc.publisherElsevier Sciencees_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/-
dc.titleLocal influences of geothermal anomalies on permafrost distribution in an active volcanic island (Deception Island, Antarctica)es_ES
dc.typeArticuloes_ES
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-sa/4.0/es_ES
dc.rights.licenseCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)-
dc.description.filiationFil: Goyanes, Gabriel Alejandro. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina.es_ES
dc.description.filiationFil: Vieira, Gonçalo. Universidade de Lisboa; Portugales_ES
dc.description.filiationFil: Caselli, Alberto Tomás. Universidad Nacional de Río Negro. Río Negro, Argentina.es_ES
dc.description.filiationFil: Cardoso, M. Universidade de Lisboa; Portugales_ES
dc.description.filiationFil: Marmy, Antoine. University of Fribourg; Suizaes_ES
dc.description.filiationFil: Santos, Fernanda. Universidade de Lisboa; Portugales_ES
dc.description.filiationFil: Bernardo, Ivo. Universidade de Lisboa; Portugales_ES
dc.description.filiationFil: Hauck, Christian. University Of Fribourg; Suizaes_ES
dc.description.filiationFil: Caselli, Alberto Tomás. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentinaes_ES
dc.subject.keywordPermafrostes_ES
dc.subject.keywordGeothermal Anomalyes_ES
dc.subject.keywordActive Volcanoes_ES
dc.subject.keywordDeception Islandes_ES
dc.subject.keywordSouth Shetlandses_ES
dc.subject.keywordAntarcticaes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.subject.materiaCiencias Exactas y Naturaleses_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología.es_ES
dc.relation.journalissue225es_ES
dc.description.reviewtruees_ES
dc.description.resumen.es_ES
dc.identifier.doihttps://doi.org/10.1016/j.geomorph.2014.04.010-
dc.relation.journalTitleGeomorphologyes_ES
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