Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)

Autores
Ramos, M.; Vieira, G.; de Pablo, M. A.; Molina, A.; Abramov, A.; Goyanes, Gabriel Alejandro
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Western Antarctic Peninsula region is one of the hot spots of climate change and one of the most ecologically sensitive regions of Antarctica, where permafrost is near its climatic limits. The research was conducted in Deception Island, an active stratovolcano in the South Shetlands archipelago off the northern tip of the Antarctic Peninsula. The climate is polar oceanic, with high precipitation and mean annual air temperatures (MAAT) close to − 3 �C. The soils are composed by ashes and pyroclasts with high porosity and high water content, with ice-rich permafrost at − 0.8 �C at the depth of zero annual amplitude, with an active layer of about 30 cm. Results from thaw depth, ground temperature and snow cover monitoring at the Crater Lake CALM-S site over the period 2006 to 2014 are analyzed. Thaw depth (TD) was measured by mechanical probing once per year in the end of January or early February in a 100 � 100 m with a 10 m spacing grid. The results show a trend for decreasing thaw depth from ci. 36 cm in 2006 to 23 cm in 2014, while MAAT, as well as ground temperatures at the base of the active layer, remained stable. However, the duration of the snow cover at the CALM-S site, measured through the Snow Pack Factor (SF) showed an increase from 2006 to 2014, especially with longer lasting snow cover in the spring and early summer. The negative correlation between SF and the thaw depth supports the significance of the influence of the increasing snow cover in thaw depth, even with no trend in the MAAT. The lack of observed ground cooling in the base of the active layer is probably linked to the high ice/water content at the transient layer. The pyroclastic soils of Deception Island, with high porosity, are key to the shallow active layer depths, when compared to other sites in the Western Antarctic Peninsula (WAP). These findings support the lack of linearity between atmospheric warming and permafrost warming and induce an extra complexity to the understanding of the effects of climate change in the ice-free areas of the WAP, especially in scenarios with increased precipitation as snow fall.
Fil: Ramos, M.. Universidad de Alcalá; España
Fil: Vieira, G.. Universidade de Lisboa; Portugal
Fil: de Pablo, M. A.. Universidad de Alcalá; España
Fil: Molina, A.. Universidad de Alcalá; España
Fil: Abramov, A.. Russian Academy of Science; Rusia
Fil: Goyanes, Gabriel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Materia
Active Layer
Antarctic Peninsula
Decreasing Thaw Depth
Permafrost
Snow Insulation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/53075

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spelling Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)Ramos, M.Vieira, G.de Pablo, M. A.Molina, A.Abramov, A.Goyanes, Gabriel AlejandroActive LayerAntarctic PeninsulaDecreasing Thaw DepthPermafrostSnow Insulationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Western Antarctic Peninsula region is one of the hot spots of climate change and one of the most ecologically sensitive regions of Antarctica, where permafrost is near its climatic limits. The research was conducted in Deception Island, an active stratovolcano in the South Shetlands archipelago off the northern tip of the Antarctic Peninsula. The climate is polar oceanic, with high precipitation and mean annual air temperatures (MAAT) close to − 3 �C. The soils are composed by ashes and pyroclasts with high porosity and high water content, with ice-rich permafrost at − 0.8 �C at the depth of zero annual amplitude, with an active layer of about 30 cm. Results from thaw depth, ground temperature and snow cover monitoring at the Crater Lake CALM-S site over the period 2006 to 2014 are analyzed. Thaw depth (TD) was measured by mechanical probing once per year in the end of January or early February in a 100 � 100 m with a 10 m spacing grid. The results show a trend for decreasing thaw depth from ci. 36 cm in 2006 to 23 cm in 2014, while MAAT, as well as ground temperatures at the base of the active layer, remained stable. However, the duration of the snow cover at the CALM-S site, measured through the Snow Pack Factor (SF) showed an increase from 2006 to 2014, especially with longer lasting snow cover in the spring and early summer. The negative correlation between SF and the thaw depth supports the significance of the influence of the increasing snow cover in thaw depth, even with no trend in the MAAT. The lack of observed ground cooling in the base of the active layer is probably linked to the high ice/water content at the transient layer. The pyroclastic soils of Deception Island, with high porosity, are key to the shallow active layer depths, when compared to other sites in the Western Antarctic Peninsula (WAP). These findings support the lack of linearity between atmospheric warming and permafrost warming and induce an extra complexity to the understanding of the effects of climate change in the ice-free areas of the WAP, especially in scenarios with increased precipitation as snow fall.Fil: Ramos, M.. Universidad de Alcalá; EspañaFil: Vieira, G.. Universidade de Lisboa; PortugalFil: de Pablo, M. A.. Universidad de Alcalá; EspañaFil: Molina, A.. Universidad de Alcalá; EspañaFil: Abramov, A.. Russian Academy of Science; RusiaFil: Goyanes, Gabriel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaElsevier Science2017-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/53075Ramos, M.; Vieira, G.; de Pablo, M. A.; Molina, A.; Abramov, A.; et al.; Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014); Elsevier Science; Catena; 149; 2-2017; 519-5280341-8162CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.catena.2016.07.019info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0341816216302788info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:46:33Zoai:ri.conicet.gov.ar:11336/53075instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:46:33.389CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)
title Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)
spellingShingle Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)
Ramos, M.
Active Layer
Antarctic Peninsula
Decreasing Thaw Depth
Permafrost
Snow Insulation
title_short Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)
title_full Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)
title_fullStr Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)
title_full_unstemmed Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)
title_sort Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014)
dc.creator.none.fl_str_mv Ramos, M.
Vieira, G.
de Pablo, M. A.
Molina, A.
Abramov, A.
Goyanes, Gabriel Alejandro
author Ramos, M.
author_facet Ramos, M.
Vieira, G.
de Pablo, M. A.
Molina, A.
Abramov, A.
Goyanes, Gabriel Alejandro
author_role author
author2 Vieira, G.
de Pablo, M. A.
Molina, A.
Abramov, A.
Goyanes, Gabriel Alejandro
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Active Layer
Antarctic Peninsula
Decreasing Thaw Depth
Permafrost
Snow Insulation
topic Active Layer
Antarctic Peninsula
Decreasing Thaw Depth
Permafrost
Snow Insulation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Western Antarctic Peninsula region is one of the hot spots of climate change and one of the most ecologically sensitive regions of Antarctica, where permafrost is near its climatic limits. The research was conducted in Deception Island, an active stratovolcano in the South Shetlands archipelago off the northern tip of the Antarctic Peninsula. The climate is polar oceanic, with high precipitation and mean annual air temperatures (MAAT) close to − 3 �C. The soils are composed by ashes and pyroclasts with high porosity and high water content, with ice-rich permafrost at − 0.8 �C at the depth of zero annual amplitude, with an active layer of about 30 cm. Results from thaw depth, ground temperature and snow cover monitoring at the Crater Lake CALM-S site over the period 2006 to 2014 are analyzed. Thaw depth (TD) was measured by mechanical probing once per year in the end of January or early February in a 100 � 100 m with a 10 m spacing grid. The results show a trend for decreasing thaw depth from ci. 36 cm in 2006 to 23 cm in 2014, while MAAT, as well as ground temperatures at the base of the active layer, remained stable. However, the duration of the snow cover at the CALM-S site, measured through the Snow Pack Factor (SF) showed an increase from 2006 to 2014, especially with longer lasting snow cover in the spring and early summer. The negative correlation between SF and the thaw depth supports the significance of the influence of the increasing snow cover in thaw depth, even with no trend in the MAAT. The lack of observed ground cooling in the base of the active layer is probably linked to the high ice/water content at the transient layer. The pyroclastic soils of Deception Island, with high porosity, are key to the shallow active layer depths, when compared to other sites in the Western Antarctic Peninsula (WAP). These findings support the lack of linearity between atmospheric warming and permafrost warming and induce an extra complexity to the understanding of the effects of climate change in the ice-free areas of the WAP, especially in scenarios with increased precipitation as snow fall.
Fil: Ramos, M.. Universidad de Alcalá; España
Fil: Vieira, G.. Universidade de Lisboa; Portugal
Fil: de Pablo, M. A.. Universidad de Alcalá; España
Fil: Molina, A.. Universidad de Alcalá; España
Fil: Abramov, A.. Russian Academy of Science; Rusia
Fil: Goyanes, Gabriel Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
description The Western Antarctic Peninsula region is one of the hot spots of climate change and one of the most ecologically sensitive regions of Antarctica, where permafrost is near its climatic limits. The research was conducted in Deception Island, an active stratovolcano in the South Shetlands archipelago off the northern tip of the Antarctic Peninsula. The climate is polar oceanic, with high precipitation and mean annual air temperatures (MAAT) close to − 3 �C. The soils are composed by ashes and pyroclasts with high porosity and high water content, with ice-rich permafrost at − 0.8 �C at the depth of zero annual amplitude, with an active layer of about 30 cm. Results from thaw depth, ground temperature and snow cover monitoring at the Crater Lake CALM-S site over the period 2006 to 2014 are analyzed. Thaw depth (TD) was measured by mechanical probing once per year in the end of January or early February in a 100 � 100 m with a 10 m spacing grid. The results show a trend for decreasing thaw depth from ci. 36 cm in 2006 to 23 cm in 2014, while MAAT, as well as ground temperatures at the base of the active layer, remained stable. However, the duration of the snow cover at the CALM-S site, measured through the Snow Pack Factor (SF) showed an increase from 2006 to 2014, especially with longer lasting snow cover in the spring and early summer. The negative correlation between SF and the thaw depth supports the significance of the influence of the increasing snow cover in thaw depth, even with no trend in the MAAT. The lack of observed ground cooling in the base of the active layer is probably linked to the high ice/water content at the transient layer. The pyroclastic soils of Deception Island, with high porosity, are key to the shallow active layer depths, when compared to other sites in the Western Antarctic Peninsula (WAP). These findings support the lack of linearity between atmospheric warming and permafrost warming and induce an extra complexity to the understanding of the effects of climate change in the ice-free areas of the WAP, especially in scenarios with increased precipitation as snow fall.
publishDate 2017
dc.date.none.fl_str_mv 2017-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/53075
Ramos, M.; Vieira, G.; de Pablo, M. A.; Molina, A.; Abramov, A.; et al.; Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014); Elsevier Science; Catena; 149; 2-2017; 519-528
0341-8162
CONICET Digital
CONICET
url http://hdl.handle.net/11336/53075
identifier_str_mv Ramos, M.; Vieira, G.; de Pablo, M. A.; Molina, A.; Abramov, A.; et al.; Recent shallowing of the thaw depth at Crater Lake, Deception Island, Antarctica (2006–2014); Elsevier Science; Catena; 149; 2-2017; 519-528
0341-8162
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.catena.2016.07.019
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0341816216302788
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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