Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle

The modern climate over much of the Andes between 22° and 26°S is very dry. Dated sediment cores from desiccated lake beds contain saline deposits (salars) that have halite fabrics that indicate during previous, less arid climates saline lakes existed at Salar de Hombre Muerto (northwest Argentina,...

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Detalles Bibliográficos
Autores: Godfrey, Linda V., Jordan, Teresa E., Lowenstein, Tim K., Alonso, Ricardo Narciso
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2003
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/132369
Acceso en línea:http://hdl.handle.net/11336/132369
Access Level:acceso abierto
Palabra clave:ISOTOPES
PALEOCLIMATE
PRECIPITATION
SALARS
SOUTH AMERICA
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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network_acronym_str AR
network_name_str Argentina
repository_id_str
spelling Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycleGodfrey, Linda V.Jordan, Teresa E.Lowenstein, Tim K.Alonso, Ricardo NarcisoISOTOPESPALEOCLIMATEPRECIPITATIONSALARSSOUTH AMERICAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The modern climate over much of the Andes between 22° and 26°S is very dry. Dated sediment cores from desiccated lake beds contain saline deposits (salars) that have halite fabrics that indicate during previous, less arid climates saline lakes existed at Salar de Hombre Muerto (northwest Argentina, Andean plateau) and Salar de Atacama (northern Chile, west flank of Andes). Paleoclimate conditions are reconstructed from the stable isotope composition of paleo-saline lake waters trapped in fluid inclusions in lacustrine halite. Models of isotopic steady state are applied to estimate the isotopic composition of inflow (meteoric) water to the paleo-lake and paleo-atmospheric water vapor. The two salars' climate records differ. The timing of Atacama saline lakes is similar to lake level highstands on the Altiplano to the northeast with the deepest lake occurring between 24 and 19.8 ka. The modern meteoric water source for Atacama and the Central Andes is currently the tropical Atlantic, via the Amazon Basin, and stable isotopic evidence indicates the same source of water for the paleo-lakes in the Atacama. In contrast, to the southeast, at Hombre Muerto, the lakes that intermittently occupied the salar became progressively smaller since 45 ka. Water isotope composition today reflects atmospheric recycling by evaporation-condensation, as it did between 24 and 20 ka, whereas water transported to the earlier lakes does not indicate significant isotopic recycling. Using knowledge of modern-day atmosphere/oceanic circulation and forcing mechanisms, we hypothesize that the shifts in moisture transport to these Andean sites are directly tied to equatorial and South Atlantic atmospheric and oceanic surface circulation.Fil: Godfrey, Linda V.. Cornell University; Estados UnidosFil: Jordan, Teresa E.. Cornell University; Estados UnidosFil: Lowenstein, Tim K.. University of Binghamton; Estados UnidosFil: Alonso, Ricardo Narciso. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Escuela de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; ArgentinaElsevier Science2003-05-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/132369Godfrey, Linda V.; Jordan, Teresa E.; Lowenstein, Tim K.; Alonso, Ricardo Narciso; Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 194; 1-3; 15-5-2003; 299-3170031-0182CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/S0031-0182(03)00283-9info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0031018203002839info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:37:37Zoai:ri.conicet.gov.ar:11336/132369instacron: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:34982024-05-08 13:37:37.36CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle
title Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle
spellingShingle Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle
Godfrey, Linda V.
ISOTOPES
PALEOCLIMATE
PRECIPITATION
SALARS
SOUTH AMERICA
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle
title_full Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle
title_fullStr Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle
title_full_unstemmed Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle
title_sort Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle
dc.creator.none.fl_str_mv Godfrey, Linda V.
Jordan, Teresa E.
Lowenstein, Tim K.
Alonso, Ricardo Narciso
author Godfrey, Linda V.
author_facet Godfrey, Linda V.
Jordan, Teresa E.
Lowenstein, Tim K.
Alonso, Ricardo Narciso
author_role author
author2 Jordan, Teresa E.
Lowenstein, Tim K.
Alonso, Ricardo Narciso
author2_role author
author
author
dc.subject.none.fl_str_mv ISOTOPES
PALEOCLIMATE
PRECIPITATION
SALARS
SOUTH AMERICA
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic ISOTOPES
PALEOCLIMATE
PRECIPITATION
SALARS
SOUTH AMERICA
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description The modern climate over much of the Andes between 22° and 26°S is very dry. Dated sediment cores from desiccated lake beds contain saline deposits (salars) that have halite fabrics that indicate during previous, less arid climates saline lakes existed at Salar de Hombre Muerto (northwest Argentina, Andean plateau) and Salar de Atacama (northern Chile, west flank of Andes). Paleoclimate conditions are reconstructed from the stable isotope composition of paleo-saline lake waters trapped in fluid inclusions in lacustrine halite. Models of isotopic steady state are applied to estimate the isotopic composition of inflow (meteoric) water to the paleo-lake and paleo-atmospheric water vapor. The two salars' climate records differ. The timing of Atacama saline lakes is similar to lake level highstands on the Altiplano to the northeast with the deepest lake occurring between 24 and 19.8 ka. The modern meteoric water source for Atacama and the Central Andes is currently the tropical Atlantic, via the Amazon Basin, and stable isotopic evidence indicates the same source of water for the paleo-lakes in the Atacama. In contrast, to the southeast, at Hombre Muerto, the lakes that intermittently occupied the salar became progressively smaller since 45 ka. Water isotope composition today reflects atmospheric recycling by evaporation-condensation, as it did between 24 and 20 ka, whereas water transported to the earlier lakes does not indicate significant isotopic recycling. Using knowledge of modern-day atmosphere/oceanic circulation and forcing mechanisms, we hypothesize that the shifts in moisture transport to these Andean sites are directly tied to equatorial and South Atlantic atmospheric and oceanic surface circulation.
publishDate 2003
dc.date.none.fl_str_mv 2003-05-15
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/11336/132369
Godfrey, Linda V.; Jordan, Teresa E.; Lowenstein, Tim K.; Alonso, Ricardo Narciso; Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 194; 1-3; 15-5-2003; 299-317
0031-0182
CONICET Digital
CONICET
url http://hdl.handle.net/11336/132369
identifier_str_mv Godfrey, Linda V.; Jordan, Teresa E.; Lowenstein, Tim K.; Alonso, Ricardo Narciso; Stable isotope constraints on the transport of water to the Andes between 22° and 26°S during the last glacial cycle; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 194; 1-3; 15-5-2003; 299-317
0031-0182
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/S0031-0182(03)00283-9
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0031018203002839
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
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15,81155

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