First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America

Autores
Falaschi, Daniel; Bravo, Claudio; Masiokas, Mariano Hugo; Villalba, Ricardo; Rivera, Andrés
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present the first glacier inventory of the Monte San Lorenzo region (47º35′S, 72º18′W) in the southern Patagonian Andes of Chile and Argentina. This region contains the largest and easternmost glaciers at these latitudes in South America. The inventory was developed using a combination of ASTER and Landsat ETM + scenes from 2005 and 2008, respectively, and a semi-automatic band ratio approach to map glacier ice. Manual corrections were applied to include debris-covered ice and ice in cast shadows. We inventoried 213 glaciers that cover a 2005/2008 total area of ca. 207 km2 and lie between 520 m and 3700 m in elevation. Landsat TM images acquired in 1985 and 2000 were subsequently used to assess changes in glacierized area over the 1985–2008 interval. Based on all available information, we determined an 18.6% reduction in the total glacier area since 1985. Glaciers smaller than 1 km2 have shown highly variable (0–100%) relative areal reduction, whereas the formation and growth of proglacial lakes promoted rapid recession of the, larger valley glaciers, which concentrate the major ice losses, representing ca. 32% of the total glacier area reduction. Glacier fragmentation has occurred for 50% of the ice bodies larger than 1 km2. These results agree with the generalized pattern of glacier retreat observed throughout the Patagonian Andes, but the lack of detailed meteorological and glaciological data in the area preclude a more refined analysis of the climate-glacier relationships and processes explaining the recent glacier trends.
Fil: Falaschi, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Bravo, Claudio. Departamento de Geofísica. Universidad de Chile; Chile
Fil: Masiokas, Mariano Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Villalba, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Rivera, Andrés. Centro de Estudios Científicos; Chile
Materia
Glacier Inventory
Patagonia
Remote Sensing
Glacier Changes
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:11336/2867
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South AmericaFalaschi, DanielBravo, ClaudioMasiokas, Mariano HugoVillalba, RicardoRivera, AndrésGlacier InventoryPatagoniaRemote SensingGlacier Changeshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We present the first glacier inventory of the Monte San Lorenzo region (47º35′S, 72º18′W) in the southern Patagonian Andes of Chile and Argentina. This region contains the largest and easternmost glaciers at these latitudes in South America. The inventory was developed using a combination of ASTER and Landsat ETM + scenes from 2005 and 2008, respectively, and a semi-automatic band ratio approach to map glacier ice. Manual corrections were applied to include debris-covered ice and ice in cast shadows. We inventoried 213 glaciers that cover a 2005/2008 total area of ca. 207 km2 and lie between 520 m and 3700 m in elevation. Landsat TM images acquired in 1985 and 2000 were subsequently used to assess changes in glacierized area over the 1985–2008 interval. Based on all available information, we determined an 18.6% reduction in the total glacier area since 1985. Glaciers smaller than 1 km2 have shown highly variable (0–100%) relative areal reduction, whereas the formation and growth of proglacial lakes promoted rapid recession of the, larger valley glaciers, which concentrate the major ice losses, representing ca. 32% of the total glacier area reduction. Glacier fragmentation has occurred for 50% of the ice bodies larger than 1 km2. These results agree with the generalized pattern of glacier retreat observed throughout the Patagonian Andes, but the lack of detailed meteorological and glaciological data in the area preclude a more refined analysis of the climate-glacier relationships and processes explaining the recent glacier trends.Fil: Falaschi, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Bravo, Claudio. Departamento de Geofísica. Universidad de Chile; ChileFil: Masiokas, Mariano Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Villalba, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Rivera, Andrés. Centro de Estudios Científicos; ChileInst Arctic Alpine Res2013-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/2867Falaschi, Daniel; Bravo, Claudio; Masiokas, Mariano Hugo; Villalba, Ricardo; Rivera, Andrés; First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America; Inst Arctic Alpine Res; Arctic Antarctic And Alpine Research; 45; 1; 2-2013; 19-281523-0430enginfo:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/abs/10.1657/1938-4246-45.1.19info:eu-repo/semantics/altIdentifier/url/1938-4246info:eu-repo/semantics/altIdentifier/doi/10.1657/1938-4246-45.1.19info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:36:44Zoai:ri.conicet.gov.ar:11336/2867instacron: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:34982025-10-22 11:36:44.89CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America
title First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America
spellingShingle First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America
Falaschi, Daniel
Glacier Inventory
Patagonia
Remote Sensing
Glacier Changes
title_short First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America
title_full First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America
title_fullStr First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America
title_full_unstemmed First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America
title_sort First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America
dc.creator.none.fl_str_mv Falaschi, Daniel
Bravo, Claudio
Masiokas, Mariano Hugo
Villalba, Ricardo
Rivera, Andrés
author Falaschi, Daniel
author_facet Falaschi, Daniel
Bravo, Claudio
Masiokas, Mariano Hugo
Villalba, Ricardo
Rivera, Andrés
author_role author
author2 Bravo, Claudio
Masiokas, Mariano Hugo
Villalba, Ricardo
Rivera, Andrés
author2_role author
author
author
author
dc.subject.none.fl_str_mv Glacier Inventory
Patagonia
Remote Sensing
Glacier Changes
topic Glacier Inventory
Patagonia
Remote Sensing
Glacier Changes
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present the first glacier inventory of the Monte San Lorenzo region (47º35′S, 72º18′W) in the southern Patagonian Andes of Chile and Argentina. This region contains the largest and easternmost glaciers at these latitudes in South America. The inventory was developed using a combination of ASTER and Landsat ETM + scenes from 2005 and 2008, respectively, and a semi-automatic band ratio approach to map glacier ice. Manual corrections were applied to include debris-covered ice and ice in cast shadows. We inventoried 213 glaciers that cover a 2005/2008 total area of ca. 207 km2 and lie between 520 m and 3700 m in elevation. Landsat TM images acquired in 1985 and 2000 were subsequently used to assess changes in glacierized area over the 1985–2008 interval. Based on all available information, we determined an 18.6% reduction in the total glacier area since 1985. Glaciers smaller than 1 km2 have shown highly variable (0–100%) relative areal reduction, whereas the formation and growth of proglacial lakes promoted rapid recession of the, larger valley glaciers, which concentrate the major ice losses, representing ca. 32% of the total glacier area reduction. Glacier fragmentation has occurred for 50% of the ice bodies larger than 1 km2. These results agree with the generalized pattern of glacier retreat observed throughout the Patagonian Andes, but the lack of detailed meteorological and glaciological data in the area preclude a more refined analysis of the climate-glacier relationships and processes explaining the recent glacier trends.
Fil: Falaschi, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Bravo, Claudio. Departamento de Geofísica. Universidad de Chile; Chile
Fil: Masiokas, Mariano Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Villalba, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Rivera, Andrés. Centro de Estudios Científicos; Chile
description We present the first glacier inventory of the Monte San Lorenzo region (47º35′S, 72º18′W) in the southern Patagonian Andes of Chile and Argentina. This region contains the largest and easternmost glaciers at these latitudes in South America. The inventory was developed using a combination of ASTER and Landsat ETM + scenes from 2005 and 2008, respectively, and a semi-automatic band ratio approach to map glacier ice. Manual corrections were applied to include debris-covered ice and ice in cast shadows. We inventoried 213 glaciers that cover a 2005/2008 total area of ca. 207 km2 and lie between 520 m and 3700 m in elevation. Landsat TM images acquired in 1985 and 2000 were subsequently used to assess changes in glacierized area over the 1985–2008 interval. Based on all available information, we determined an 18.6% reduction in the total glacier area since 1985. Glaciers smaller than 1 km2 have shown highly variable (0–100%) relative areal reduction, whereas the formation and growth of proglacial lakes promoted rapid recession of the, larger valley glaciers, which concentrate the major ice losses, representing ca. 32% of the total glacier area reduction. Glacier fragmentation has occurred for 50% of the ice bodies larger than 1 km2. These results agree with the generalized pattern of glacier retreat observed throughout the Patagonian Andes, but the lack of detailed meteorological and glaciological data in the area preclude a more refined analysis of the climate-glacier relationships and processes explaining the recent glacier trends.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
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/11336/2867
Falaschi, Daniel; Bravo, Claudio; Masiokas, Mariano Hugo; Villalba, Ricardo; Rivera, Andrés; First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America; Inst Arctic Alpine Res; Arctic Antarctic And Alpine Research; 45; 1; 2-2013; 19-28
1523-0430
url http://hdl.handle.net/11336/2867
identifier_str_mv Falaschi, Daniel; Bravo, Claudio; Masiokas, Mariano Hugo; Villalba, Ricardo; Rivera, Andrés; First glacier inventory and recent changes in glacier area in the monte San Lorenzo region (47ºS), Southern Patagonian Andes, South America; Inst Arctic Alpine Res; Arctic Antarctic And Alpine Research; 45; 1; 2-2013; 19-28
1523-0430
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/abs/10.1657/1938-4246-45.1.19
info:eu-repo/semantics/altIdentifier/url/1938-4246
info:eu-repo/semantics/altIdentifier/doi/10.1657/1938-4246-45.1.19
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 Inst Arctic Alpine Res
publisher.none.fl_str_mv Inst Arctic Alpine Res
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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score 12.982451

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