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Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic)

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dc.contributor.authorRamos, Miguel
dc.contributor.authorVieira, Gonçalo
dc.contributor.authorde Pablo, Miguel Angel
dc.contributor.authorMolina, Antonio
dc.contributor.authorJiménez Cuenca, Juan Javier
dc.date.accessioned2020-12-29T14:56:23Z
dc.date.available2020-12-29T14:56:23Z
dc.date.issued2020
dc.description.abstractThe Antarctic Peninsula (AP) region has been one of the regions on Earth with strongest warming since 1950. However, the northwest of the AP showed a cooling from 2000 to 2015, which had local consequences with an increase in snow accumulation and a deceleration in the loss of mass from glaciers. In this paper, we studied the e ects of increased snow accumulation in the permafrost thermal regime in two boreholes (PG1 and PG2) in Livingston Island, South Shetlands Archipelago, from 2009 to 2015. The two boreholes located c. 300 m apart but at similar elevation showed di erent snow accumulation, with PG2 becoming completely covered with snow all year long, while the other remained mostly snow free during the summer. The analysis of the thermal regimes and of the estimated soil surface energy exchange during the study period showed the e ects of snow insulation in reducing the active layer thickness. These e ects were especially relevant in PG2, which transitioned from a subaerial to a subnival regime. There, permafrost aggraded from below, with the active layer completely disappearing and the e ciency of thermal insulation by the snowpack prevailing in the thermal regime. This situation may be used as an analogue for the transition from a periglacial to a subglacial environment in longer periods of cooling in the paleoenvironmental record.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRamos, M., Vieira, G., de Pablo, M. A., Molina, A. & Jimenez, J.J. (2020). Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic). Atmosphere, 11(12), 1332. https://doi.org/10.3390/atmos11121332pt_PT
dc.identifier.doi10.3390/atmos11121332pt_PT
dc.identifier.issn2073-4433
dc.identifier.urihttp://hdl.handle.net/10451/45580
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relation.publisherversionhttps://www.mdpi.com/2073-4433/11/12/1332pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPermafrostpt_PT
dc.subjectActive layerpt_PT
dc.subjectSnow thicknesspt_PT
dc.subjectEnthalpypt_PT
dc.titleTransition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberPTDC/AAG-GLO/3908/2012
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FAAG-GLO%2F3908%2F2012/PT
oaire.citation.issue12pt_PT
oaire.citation.startPage1332pt_PT
oaire.citation.titleAtmospherept_PT
oaire.citation.volume11pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameRamos
person.familyNameBrito Guapo Teles Vieira
person.familyNameJiménez Cuenca
person.givenNameMiguel
person.givenNameGonçalo
person.givenNameJuan Javier
person.identifierG-5958-2010
person.identifier.ciencia-id2519-6583-CAEA
person.identifier.orcid0000-0003-3648-6818
person.identifier.orcid0000-0001-7611-3464
person.identifier.orcid0000-0001-7677-8140
person.identifier.ridK-2230-2014
person.identifier.scopus-author-id8676487200
person.identifier.scopus-author-id7005863976
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa0544f42-b78e-4fd4-9204-f6acfa4e1e9d
relation.isAuthorOfPublication7039fbb2-e1f8-4c3e-80f1-603b12d33c1c
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