Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum

A paleoglacier reconstruction during the Last Glacial Maximum (LGM) is presented for a high mountain area of La Covacha massif in Sierra de Gredos (Iberian Central System) in central Spain. The moraines that, according with the previous literature, had formed during the global LGM, were mapped throu...

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Detalhes bibliográficos
Autores: Campos, Néstor, Palacios Estremera, David, Tanarro García, Luis Miguel
Formato: artículo
Fecha de publicación:2019
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/99843
Acesso em linha:https://hdl.handle.net/20.500.14352/99843
Access Level:acceso abierto
Palavra-chave:911.2
Geografía física
2505.07 Geografía Física
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spelling Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial MaximumCampos, NéstorPalacios Estremera, DavidTanarro García, Luis Miguel911.2Geografía física2505.07 Geografía FísicaA paleoglacier reconstruction during the Last Glacial Maximum (LGM) is presented for a high mountain area of La Covacha massif in Sierra de Gredos (Iberian Central System) in central Spain. The moraines that, according with the previous literature, had formed during the global LGM, were mapped through photo interpretation of digital aerial photographs and 3D images and detailed field surveys. The topography of the paleoglaciers was estimated using a simple steady-state model that assumed a perfectly plastic ice rheology, reconstructing the theoretical ice profiles and obtaining the ice thickness of the glaciers during the LGM. The reconstruction of the glaciers was carried out using automated and semi-automated physically-based models, obtaining more realistic results with semi-automated models. According to our study, the paleoglaciers in the study area covered an area of 34.79 km2 during the global LGM, with a maximum ice thickness of 366 meters in La Vega gorge, a total volume of 34.25 × 108 m3 and a mean paleoELA of 1932 meters. Most of the ice (∼82%) was in paleoglaciers facing north, and the rest was in paleoglaciers with other orientations. This emphasizes the importance of orientation in relation to glacier dynamics and ice accumulation. The results obtained in the calculation of paleoELAs during the global LGM in Gredos are average compared to the Iberian mountains of the Northwest where the values were much lower, and with respect to those of the Southwest, much higher. This demonstrates the importance of the exposure of Mediterranean mountains to the humidity sources coming from the NW during the global LGM, as is the case at present.SpringerUniversidad Complutense de Madrid20192019-01-0120192019-01-01journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/99843reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/998432026-06-02T12:44:21Z
dc.title.none.fl_str_mv Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
title Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
spellingShingle Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
Campos, Néstor
911.2
Geografía física
2505.07 Geografía Física
title_short Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
title_full Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
title_fullStr Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
title_full_unstemmed Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
title_sort Glacier reconstruction of La Covacha massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
dc.creator.none.fl_str_mv Campos, Néstor
Palacios Estremera, David
Tanarro García, Luis Miguel
author Campos, Néstor
author_facet Campos, Néstor
Palacios Estremera, David
Tanarro García, Luis Miguel
author_role author
author2 Palacios Estremera, David
Tanarro García, Luis Miguel
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 911.2
Geografía física
2505.07 Geografía Física
topic 911.2
Geografía física
2505.07 Geografía Física
description A paleoglacier reconstruction during the Last Glacial Maximum (LGM) is presented for a high mountain area of La Covacha massif in Sierra de Gredos (Iberian Central System) in central Spain. The moraines that, according with the previous literature, had formed during the global LGM, were mapped through photo interpretation of digital aerial photographs and 3D images and detailed field surveys. The topography of the paleoglaciers was estimated using a simple steady-state model that assumed a perfectly plastic ice rheology, reconstructing the theoretical ice profiles and obtaining the ice thickness of the glaciers during the LGM. The reconstruction of the glaciers was carried out using automated and semi-automated physically-based models, obtaining more realistic results with semi-automated models. According to our study, the paleoglaciers in the study area covered an area of 34.79 km2 during the global LGM, with a maximum ice thickness of 366 meters in La Vega gorge, a total volume of 34.25 × 108 m3 and a mean paleoELA of 1932 meters. Most of the ice (∼82%) was in paleoglaciers facing north, and the rest was in paleoglaciers with other orientations. This emphasizes the importance of orientation in relation to glacier dynamics and ice accumulation. The results obtained in the calculation of paleoELAs during the global LGM in Gredos are average compared to the Iberian mountains of the Northwest where the values were much lower, and with respect to those of the Southwest, much higher. This demonstrates the importance of the exposure of Mediterranean mountains to the humidity sources coming from the NW during the global LGM, as is the case at present.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-01-01
2019
2019-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/99843
url https://hdl.handle.net/20.500.14352/99843
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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