Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S

Autores
Hoke, Gregory D.; Aranibar, Julieta Nelida; Viale, Maximiliano; Araneo, Diego Christian; Llano, Carina Lourdes
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Constraining the influence of different moisture sources across the flanks of mountain ranges isimportant for understanding tectonic, geomorphic, and paleoclimate problems at geologic timescales, aswell as evaluating climate change and water resources on human time scales. The stable isotope compositionsof stream waters and precipitation are an ideal tool for this task. This study reports the results of a2 year monthly precipitation sampling campaign on the eastern flank of the Andes in the Mendoza Province of Argentina, which began in September 2008. A total of 104 precipitation samples spanning some 2500mof relief from nine sites were analyzed for dD and d18O. In addition, 81 samples from Andean riverscollected on both sides of the range in 2002 and 2007 were analyzed. We employ a Rayleigh isotope fractionation modeling approach to explore spatial and temporal variations in precipitation and river water compositions. The results indicate that precipitation on the eastern slopes of the Andes at ~33S, at elevations above 2 km, is largely derived from a westerly, Pacific-source component and a mixture of easterly and westerly sources below 2 km. Further south at ~35S, river water compositions exhibit a strong winter influence. At 33S, rivers have an isotopic minimum of ~18% across the core of the range, which has an average elevation of 4000 m, and are topographically offset from similar isotopic values of precipitation by +1000 m. Comparison of precipitation and river water data with temperature-corrected d18O estimates from pedogenic carbonates illustrates that carbonates capture the range of variability observed in modern precipitation and Rayleigh fractionation models.
Fil: Hoke, Gregory D.. Syracuse University;
Fil: Aranibar, Julieta Nelida. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;
Fil: Viale, Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;
Fil: Araneo, Diego Christian. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;
Fil: Llano, Carina Lourdes. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales;
Materia
stable isotopes
precipitation
pedogenic carbonates
Andes
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:11336/691
Acceder
id CONICETDig_ffc4d5048101c4448f608ab421b66e14
oai_identifier_str oai:ri.conicet.gov.ar:11336/691
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°SHoke, Gregory D.Aranibar, Julieta NelidaViale, MaximilianoAraneo, Diego ChristianLlano, Carina Lourdesstable isotopesprecipitationpedogenic carbonatesAndeshttps://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.5Constraining the influence of different moisture sources across the flanks of mountain ranges isimportant for understanding tectonic, geomorphic, and paleoclimate problems at geologic timescales, aswell as evaluating climate change and water resources on human time scales. The stable isotope compositionsof stream waters and precipitation are an ideal tool for this task. This study reports the results of a2 year monthly precipitation sampling campaign on the eastern flank of the Andes in the Mendoza Province of Argentina, which began in September 2008. A total of 104 precipitation samples spanning some 2500mof relief from nine sites were analyzed for dD and d18O. In addition, 81 samples from Andean riverscollected on both sides of the range in 2002 and 2007 were analyzed. We employ a Rayleigh isotope fractionation modeling approach to explore spatial and temporal variations in precipitation and river water compositions. The results indicate that precipitation on the eastern slopes of the Andes at ~33S, at elevations above 2 km, is largely derived from a westerly, Pacific-source component and a mixture of easterly and westerly sources below 2 km. Further south at ~35S, river water compositions exhibit a strong winter influence. At 33S, rivers have an isotopic minimum of ~18% across the core of the range, which has an average elevation of 4000 m, and are topographically offset from similar isotopic values of precipitation by +1000 m. Comparison of precipitation and river water data with temperature-corrected d18O estimates from pedogenic carbonates illustrates that carbonates capture the range of variability observed in modern precipitation and Rayleigh fractionation models.Fil: Hoke, Gregory D.. Syracuse University;Fil: Aranibar, Julieta Nelida. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;Fil: Viale, Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;Fil: Araneo, Diego Christian. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;Fil: Llano, Carina Lourdes. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales;Amer Geophysical Union2013-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/691Hoke, Gregory D.; Aranibar, Julieta Nelida; Viale, Maximiliano; Araneo, Diego Christian; Llano, Carina Lourdes; Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S; Amer Geophysical Union; Geochemistry Geophysics Geosystems; 14; 4-2013; 962-9781525-2027enginfo:eu-repo/semantics/altIdentifier/doi/10.1002/ggge.20045/abstractinfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/ggge.20045/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:09:14Zoai:ri.conicet.gov.ar:11336/691instacron: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:34982025-09-29 10:09:14.757CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S
title Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S
spellingShingle Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S
Hoke, Gregory D.
stable isotopes
precipitation
pedogenic carbonates
Andes
title_short Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S
title_full Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S
title_fullStr Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S
title_full_unstemmed Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S
title_sort Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S
dc.creator.none.fl_str_mv Hoke, Gregory D.
Aranibar, Julieta Nelida
Viale, Maximiliano
Araneo, Diego Christian
Llano, Carina Lourdes
author Hoke, Gregory D.
author_facet Hoke, Gregory D.
Aranibar, Julieta Nelida
Viale, Maximiliano
Araneo, Diego Christian
Llano, Carina Lourdes
author_role author
author2 Aranibar, Julieta Nelida
Viale, Maximiliano
Araneo, Diego Christian
Llano, Carina Lourdes
author2_role author
author
author
author
dc.subject.none.fl_str_mv stable isotopes
precipitation
pedogenic carbonates
Andes
topic stable isotopes
precipitation
pedogenic carbonates
Andes
purl_subject.fl_str_mv https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.5
dc.description.none.fl_txt_mv Constraining the influence of different moisture sources across the flanks of mountain ranges isimportant for understanding tectonic, geomorphic, and paleoclimate problems at geologic timescales, aswell as evaluating climate change and water resources on human time scales. The stable isotope compositionsof stream waters and precipitation are an ideal tool for this task. This study reports the results of a2 year monthly precipitation sampling campaign on the eastern flank of the Andes in the Mendoza Province of Argentina, which began in September 2008. A total of 104 precipitation samples spanning some 2500mof relief from nine sites were analyzed for dD and d18O. In addition, 81 samples from Andean riverscollected on both sides of the range in 2002 and 2007 were analyzed. We employ a Rayleigh isotope fractionation modeling approach to explore spatial and temporal variations in precipitation and river water compositions. The results indicate that precipitation on the eastern slopes of the Andes at ~33S, at elevations above 2 km, is largely derived from a westerly, Pacific-source component and a mixture of easterly and westerly sources below 2 km. Further south at ~35S, river water compositions exhibit a strong winter influence. At 33S, rivers have an isotopic minimum of ~18% across the core of the range, which has an average elevation of 4000 m, and are topographically offset from similar isotopic values of precipitation by +1000 m. Comparison of precipitation and river water data with temperature-corrected d18O estimates from pedogenic carbonates illustrates that carbonates capture the range of variability observed in modern precipitation and Rayleigh fractionation models.
Fil: Hoke, Gregory D.. Syracuse University;
Fil: Aranibar, Julieta Nelida. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;
Fil: Viale, Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;
Fil: Araneo, Diego Christian. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico - CONICET - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias. Ambientales; Argentina;
Fil: Llano, Carina Lourdes. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales;
description Constraining the influence of different moisture sources across the flanks of mountain ranges isimportant for understanding tectonic, geomorphic, and paleoclimate problems at geologic timescales, aswell as evaluating climate change and water resources on human time scales. The stable isotope compositionsof stream waters and precipitation are an ideal tool for this task. This study reports the results of a2 year monthly precipitation sampling campaign on the eastern flank of the Andes in the Mendoza Province of Argentina, which began in September 2008. A total of 104 precipitation samples spanning some 2500mof relief from nine sites were analyzed for dD and d18O. In addition, 81 samples from Andean riverscollected on both sides of the range in 2002 and 2007 were analyzed. We employ a Rayleigh isotope fractionation modeling approach to explore spatial and temporal variations in precipitation and river water compositions. The results indicate that precipitation on the eastern slopes of the Andes at ~33S, at elevations above 2 km, is largely derived from a westerly, Pacific-source component and a mixture of easterly and westerly sources below 2 km. Further south at ~35S, river water compositions exhibit a strong winter influence. At 33S, rivers have an isotopic minimum of ~18% across the core of the range, which has an average elevation of 4000 m, and are topographically offset from similar isotopic values of precipitation by +1000 m. Comparison of precipitation and river water data with temperature-corrected d18O estimates from pedogenic carbonates illustrates that carbonates capture the range of variability observed in modern precipitation and Rayleigh fractionation models.
publishDate 2013
dc.date.none.fl_str_mv 2013-04
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/11336/691
Hoke, Gregory D.; Aranibar, Julieta Nelida; Viale, Maximiliano; Araneo, Diego Christian; Llano, Carina Lourdes; Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S; Amer Geophysical Union; Geochemistry Geophysics Geosystems; 14; 4-2013; 962-978
1525-2027
url http://hdl.handle.net/11336/691
identifier_str_mv Hoke, Gregory D.; Aranibar, Julieta Nelida; Viale, Maximiliano; Araneo, Diego Christian; Llano, Carina Lourdes; Isotopic characterization of mountain precipitation along the eastern flank of the Andes between 32.5 ? 35°S; Amer Geophysical Union; Geochemistry Geophysics Geosystems; 14; 4-2013; 962-978
1525-2027
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/ggge.20045/abstract
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/ggge.20045/abstract
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 Amer Geophysical Union
publisher.none.fl_str_mv Amer Geophysical Union
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 13.069144

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