An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)

Autores
García, Ayôn; Ulloa, Christopher; Amigo, Gonzalo; Milana, Juan Pablo; Medina, Catherine
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
An integral, glacial and periglacial, inventory of the cryosphere in the Atacama region in Chile was carried out to estimate the amount of frozen water reserves in this arid to hyper-arid region. The inventory was carried out with medium to high spatial resolution satellite images and resulted in a total of 168,908 ha of landforms with significant ice content in one of the most fragile Andean ecosystems: the semi-arid – hyper-arid zones. This study shows an integral mapping of the cryosphere including glaciers and ice-bearing periglacial landforms. The different ice landforms in the Atacama region shows a progressive change in the landforms containing ice responding to the northwards increase of aridity upon entry to the South American hyper-arid axis. The main change observed is that uncovered glaciers are not present north of 26.5°S, being replaced by creeping permafrost landforms. Uncovered glaciers may produce more water annually compared to other ice-bearing landforms, but they only represent 2.7% of the cryospheric area. However, cryoforms containing a mixture of ice, sediment and rock fragments could be more important as water reserves because of their large extensions that cover c. 97% of the total area of ice-bearing landforms mapped. It also shows that the water-supply potential of ice-bearing periglacial landforms could be much higher than that of the glaciers in arid zones. The comparison with the previous inventory of 1987 suggests a reduction of 34% of uncovered glaciers, which is consistent with the aridization process observed in almost all of northern Chile. These findings reinforce the fact that glaciers and other types of permanent ice-bearing landforms need to be inventoried together if the objective is to provide the society with a realistic view of the distribution of the cryospheric hydrological resources in desert regions.
Fil: García, Ayôn. Universidad de Atacama; Chile
Fil: Ulloa, Christopher. Universidad de Atacama; Chile
Fil: Amigo, Gonzalo. Universidad de Atacama; Chile
Fil: Milana, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Medina, Catherine. Universidad de Atacama; Chile
Materia
Arid Diagonal
Atacama
Cryosphere
Glaciers
Inventory
Permafrost
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:11336/64866
Acceder
id CONICETDig_f733f324d41a7d00501cd77fb9fbe53d
oai_identifier_str oai:ri.conicet.gov.ar:11336/64866
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)García, AyônUlloa, ChristopherAmigo, GonzaloMilana, Juan PabloMedina, CatherineArid DiagonalAtacamaCryosphereGlaciersInventoryPermafrosthttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1An integral, glacial and periglacial, inventory of the cryosphere in the Atacama region in Chile was carried out to estimate the amount of frozen water reserves in this arid to hyper-arid region. The inventory was carried out with medium to high spatial resolution satellite images and resulted in a total of 168,908 ha of landforms with significant ice content in one of the most fragile Andean ecosystems: the semi-arid – hyper-arid zones. This study shows an integral mapping of the cryosphere including glaciers and ice-bearing periglacial landforms. The different ice landforms in the Atacama region shows a progressive change in the landforms containing ice responding to the northwards increase of aridity upon entry to the South American hyper-arid axis. The main change observed is that uncovered glaciers are not present north of 26.5°S, being replaced by creeping permafrost landforms. Uncovered glaciers may produce more water annually compared to other ice-bearing landforms, but they only represent 2.7% of the cryospheric area. However, cryoforms containing a mixture of ice, sediment and rock fragments could be more important as water reserves because of their large extensions that cover c. 97% of the total area of ice-bearing landforms mapped. It also shows that the water-supply potential of ice-bearing periglacial landforms could be much higher than that of the glaciers in arid zones. The comparison with the previous inventory of 1987 suggests a reduction of 34% of uncovered glaciers, which is consistent with the aridization process observed in almost all of northern Chile. These findings reinforce the fact that glaciers and other types of permanent ice-bearing landforms need to be inventoried together if the objective is to provide the society with a realistic view of the distribution of the cryospheric hydrological resources in desert regions.Fil: García, Ayôn. Universidad de Atacama; ChileFil: Ulloa, Christopher. Universidad de Atacama; ChileFil: Amigo, Gonzalo. Universidad de Atacama; ChileFil: Milana, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Medina, Catherine. Universidad de Atacama; ChilePergamon-Elsevier Science Ltd2017-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/64866García, Ayôn; Ulloa, Christopher; Amigo, Gonzalo; Milana, Juan Pablo; Medina, Catherine; An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile); Pergamon-Elsevier Science Ltd; Quaternary International; 438; 5-2017; 4-191040-6182CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2017.04.033info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1040618216310564info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:37:41Zoai:ri.conicet.gov.ar:11336/64866instacron: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:34982025-10-15 14:37:41.673CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)
title An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)
spellingShingle An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)
García, Ayôn
Arid Diagonal
Atacama
Cryosphere
Glaciers
Inventory
Permafrost
title_short An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)
title_full An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)
title_fullStr An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)
title_full_unstemmed An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)
title_sort An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile)
dc.creator.none.fl_str_mv García, Ayôn
Ulloa, Christopher
Amigo, Gonzalo
Milana, Juan Pablo
Medina, Catherine
author García, Ayôn
author_facet García, Ayôn
Ulloa, Christopher
Amigo, Gonzalo
Milana, Juan Pablo
Medina, Catherine
author_role author
author2 Ulloa, Christopher
Amigo, Gonzalo
Milana, Juan Pablo
Medina, Catherine
author2_role author
author
author
author
dc.subject.none.fl_str_mv Arid Diagonal
Atacama
Cryosphere
Glaciers
Inventory
Permafrost
topic Arid Diagonal
Atacama
Cryosphere
Glaciers
Inventory
Permafrost
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv An integral, glacial and periglacial, inventory of the cryosphere in the Atacama region in Chile was carried out to estimate the amount of frozen water reserves in this arid to hyper-arid region. The inventory was carried out with medium to high spatial resolution satellite images and resulted in a total of 168,908 ha of landforms with significant ice content in one of the most fragile Andean ecosystems: the semi-arid – hyper-arid zones. This study shows an integral mapping of the cryosphere including glaciers and ice-bearing periglacial landforms. The different ice landforms in the Atacama region shows a progressive change in the landforms containing ice responding to the northwards increase of aridity upon entry to the South American hyper-arid axis. The main change observed is that uncovered glaciers are not present north of 26.5°S, being replaced by creeping permafrost landforms. Uncovered glaciers may produce more water annually compared to other ice-bearing landforms, but they only represent 2.7% of the cryospheric area. However, cryoforms containing a mixture of ice, sediment and rock fragments could be more important as water reserves because of their large extensions that cover c. 97% of the total area of ice-bearing landforms mapped. It also shows that the water-supply potential of ice-bearing periglacial landforms could be much higher than that of the glaciers in arid zones. The comparison with the previous inventory of 1987 suggests a reduction of 34% of uncovered glaciers, which is consistent with the aridization process observed in almost all of northern Chile. These findings reinforce the fact that glaciers and other types of permanent ice-bearing landforms need to be inventoried together if the objective is to provide the society with a realistic view of the distribution of the cryospheric hydrological resources in desert regions.
Fil: García, Ayôn. Universidad de Atacama; Chile
Fil: Ulloa, Christopher. Universidad de Atacama; Chile
Fil: Amigo, Gonzalo. Universidad de Atacama; Chile
Fil: Milana, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Medina, Catherine. Universidad de Atacama; Chile
description An integral, glacial and periglacial, inventory of the cryosphere in the Atacama region in Chile was carried out to estimate the amount of frozen water reserves in this arid to hyper-arid region. The inventory was carried out with medium to high spatial resolution satellite images and resulted in a total of 168,908 ha of landforms with significant ice content in one of the most fragile Andean ecosystems: the semi-arid – hyper-arid zones. This study shows an integral mapping of the cryosphere including glaciers and ice-bearing periglacial landforms. The different ice landforms in the Atacama region shows a progressive change in the landforms containing ice responding to the northwards increase of aridity upon entry to the South American hyper-arid axis. The main change observed is that uncovered glaciers are not present north of 26.5°S, being replaced by creeping permafrost landforms. Uncovered glaciers may produce more water annually compared to other ice-bearing landforms, but they only represent 2.7% of the cryospheric area. However, cryoforms containing a mixture of ice, sediment and rock fragments could be more important as water reserves because of their large extensions that cover c. 97% of the total area of ice-bearing landforms mapped. It also shows that the water-supply potential of ice-bearing periglacial landforms could be much higher than that of the glaciers in arid zones. The comparison with the previous inventory of 1987 suggests a reduction of 34% of uncovered glaciers, which is consistent with the aridization process observed in almost all of northern Chile. These findings reinforce the fact that glaciers and other types of permanent ice-bearing landforms need to be inventoried together if the objective is to provide the society with a realistic view of the distribution of the cryospheric hydrological resources in desert regions.
publishDate 2017
dc.date.none.fl_str_mv 2017-05
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/11336/64866
García, Ayôn; Ulloa, Christopher; Amigo, Gonzalo; Milana, Juan Pablo; Medina, Catherine; An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile); Pergamon-Elsevier Science Ltd; Quaternary International; 438; 5-2017; 4-19
1040-6182
CONICET Digital
CONICET
url http://hdl.handle.net/11336/64866
identifier_str_mv García, Ayôn; Ulloa, Christopher; Amigo, Gonzalo; Milana, Juan Pablo; Medina, Catherine; An inventory of cryospheric landforms in the arid diagonal of South America (high Central Andes, Atacama region, Chile); Pergamon-Elsevier Science Ltd; Quaternary International; 438; 5-2017; 4-19
1040-6182
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.quaint.2017.04.033
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1040618216310564
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 Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
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
_version_ 1846082851312762880
score 13.22299

Publicaciones similares