Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model

Autores
Lange, H.; Casassa, G.; Ivins, E. R.; Schröder, L.; Fritsche, M.; Richter, Andreas Jorg; Groh, A.; Dietrich, R.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Thirty‒one GPS geodetic measurements of crustal uplift in southernmost South America determined extraordinarily high trend rates (> 35 mm/yr) in the north‒central part of the Southern Patagonian Icefield. These trends have a coherent pattern, motivating a refined viscoelastic glacial isostatic adjustment model to explain the observations. Two end‒member models provide good fits: both require a lithospheric thickness of 36.5 ± 5.3 km. However, one end‒member has a mantle viscosity near η =1.6 ×1018 Pa s and an ice collapse rate from the Little Ice Age (LIA) maximum comparable to a lowest recent estimate of 1995–2012 ice loss at about −11 Gt/yr. In contrast, the other end‒member has much larger viscosity: η = 8.0 ×1018 Pa s, half the post–LIA collapse rate, and a steadily rising loss rate in the twentieth century after AD 1943, reaching −25.9 Gt/yr during 1995–2012.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Astronomía
Crustal uplift
Earth model
Glacial isostatic adjustment
Southern patagonian icefield
GNSS Geodesy
ice loss
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/102564
Acceder
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network_name_str SEDICI (UNLP)
spelling Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth modelLange, H.Casassa, G.Ivins, E. R.Schröder, L.Fritsche, M.Richter, Andreas JorgGroh, A.Dietrich, R.AstronomíaCrustal upliftEarth modelGlacial isostatic adjustmentSouthern patagonian icefieldGNSS Geodesyice lossThirty‒one GPS geodetic measurements of crustal uplift in southernmost South America determined extraordinarily high trend rates (> 35 mm/yr) in the north‒central part of the Southern Patagonian Icefield. These trends have a coherent pattern, motivating a refined viscoelastic glacial isostatic adjustment model to explain the observations. Two end‒member models provide good fits: both require a lithospheric thickness of 36.5 ± 5.3 km. However, one end‒member has a mantle viscosity near η =1.6 ×10<sup>18</sup> Pa s and an ice collapse rate from the Little Ice Age (LIA) maximum comparable to a lowest recent estimate of 1995–2012 ice loss at about −11 Gt/yr. In contrast, the other end‒member has much larger viscosity: η = 8.0 ×10<sup>18</sup> Pa s, half the post–LIA collapse rate, and a steadily rising loss rate in the twentieth century after AD 1943, reaching −25.9 Gt/yr during 1995–2012.Facultad de Ciencias Astronómicas y Geofísicas2014-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf805-812http://sedici.unlp.edu.ar/handle/10915/102564enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/31153info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2013GL058419/abstractinfo:eu-repo/semantics/altIdentifier/issn/0094-8276info:eu-repo/semantics/altIdentifier/doi/10.1002/2013GL058419info:eu-repo/semantics/altIdentifier/hdl/11336/31153info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:20:01Zoai:sedici.unlp.edu.ar:10915/102564Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:01.902SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
title Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
spellingShingle Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
Lange, H.
Astronomía
Crustal uplift
Earth model
Glacial isostatic adjustment
Southern patagonian icefield
GNSS Geodesy
ice loss
title_short Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
title_full Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
title_fullStr Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
title_full_unstemmed Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
title_sort Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
dc.creator.none.fl_str_mv Lange, H.
Casassa, G.
Ivins, E. R.
Schröder, L.
Fritsche, M.
Richter, Andreas Jorg
Groh, A.
Dietrich, R.
author Lange, H.
author_facet Lange, H.
Casassa, G.
Ivins, E. R.
Schröder, L.
Fritsche, M.
Richter, Andreas Jorg
Groh, A.
Dietrich, R.
author_role author
author2 Casassa, G.
Ivins, E. R.
Schröder, L.
Fritsche, M.
Richter, Andreas Jorg
Groh, A.
Dietrich, R.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Astronomía
Crustal uplift
Earth model
Glacial isostatic adjustment
Southern patagonian icefield
GNSS Geodesy
ice loss
topic Astronomía
Crustal uplift
Earth model
Glacial isostatic adjustment
Southern patagonian icefield
GNSS Geodesy
ice loss
dc.description.none.fl_txt_mv Thirty‒one GPS geodetic measurements of crustal uplift in southernmost South America determined extraordinarily high trend rates (> 35 mm/yr) in the north‒central part of the Southern Patagonian Icefield. These trends have a coherent pattern, motivating a refined viscoelastic glacial isostatic adjustment model to explain the observations. Two end‒member models provide good fits: both require a lithospheric thickness of 36.5 ± 5.3 km. However, one end‒member has a mantle viscosity near η =1.6 ×10<sup>18</sup> Pa s and an ice collapse rate from the Little Ice Age (LIA) maximum comparable to a lowest recent estimate of 1995–2012 ice loss at about −11 Gt/yr. In contrast, the other end‒member has much larger viscosity: η = 8.0 ×10<sup>18</sup> Pa s, half the post–LIA collapse rate, and a steadily rising loss rate in the twentieth century after AD 1943, reaching −25.9 Gt/yr during 1995–2012.
Facultad de Ciencias Astronómicas y Geofísicas
description Thirty‒one GPS geodetic measurements of crustal uplift in southernmost South America determined extraordinarily high trend rates (> 35 mm/yr) in the north‒central part of the Southern Patagonian Icefield. These trends have a coherent pattern, motivating a refined viscoelastic glacial isostatic adjustment model to explain the observations. Two end‒member models provide good fits: both require a lithospheric thickness of 36.5 ± 5.3 km. However, one end‒member has a mantle viscosity near η =1.6 ×10<sup>18</sup> Pa s and an ice collapse rate from the Little Ice Age (LIA) maximum comparable to a lowest recent estimate of 1995–2012 ice loss at about −11 Gt/yr. In contrast, the other end‒member has much larger viscosity: η = 8.0 ×10<sup>18</sup> Pa s, half the post–LIA collapse rate, and a steadily rising loss rate in the twentieth century after AD 1943, reaching −25.9 Gt/yr during 1995–2012.
publishDate 2014
dc.date.none.fl_str_mv 2014-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/102564
url http://sedici.unlp.edu.ar/handle/10915/102564
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/31153
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2013GL058419/abstract
info:eu-repo/semantics/altIdentifier/issn/0094-8276
info:eu-repo/semantics/altIdentifier/doi/10.1002/2013GL058419
info:eu-repo/semantics/altIdentifier/hdl/11336/31153
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
805-812
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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