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Lake water based isoscape in central-south Chile reflects meteoric water

Warming across the globe is expected to alter the strength and amount of regional precipitation, but there is uncertainty associated with the magnitude of these expected changes, and also how these changes in temperature and the hydrologic cycle will affect humans. For example, the climate in centra...

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Autores principales: Scott, Wesley P., Contreras, Sergio, Bowen, Gabriel J., Arnold, T. Elliott, Bustamante-Ortega, Ramón, Werne, Josef P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8062518/
https://www.ncbi.nlm.nih.gov/pubmed/33888733
http://dx.doi.org/10.1038/s41598-021-87566-4
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author Scott, Wesley P.
Contreras, Sergio
Bowen, Gabriel J.
Arnold, T. Elliott
Bustamante-Ortega, Ramón
Werne, Josef P.
author_facet Scott, Wesley P.
Contreras, Sergio
Bowen, Gabriel J.
Arnold, T. Elliott
Bustamante-Ortega, Ramón
Werne, Josef P.
author_sort Scott, Wesley P.
collection PubMed
description Warming across the globe is expected to alter the strength and amount of regional precipitation, but there is uncertainty associated with the magnitude of these expected changes, and also how these changes in temperature and the hydrologic cycle will affect humans. For example, the climate in central-south Chile is projected to become significantly warmer and drier over the next several decades in response to anthropogenically driven warming, but these anthropogenic changes are superimposed on natural climate variability. The stable isotope composition of meteoric water provides significant information regarding the moisture source, pathways, and rain-out history of an air mass, but precipitation samples suitable for stable isotope measurements require long-term placement of field equipment making them difficult to obtain. The International Atomic Energy Agency (IAEA) Global Network of Isotopes in Precipitation (GNIP) stations generate isotopic and ancillary data of precipitation from many locations around the world, but remote areas of developing countries like Chile typically have sparse networks of meteorological stations, which inhibit our ability to accurately model regional precipitation. Central-south Chile, in particular, has a sparse network of GNIP stations and, as a result, the isotopic composition of meteoric water is underrepresented in the global database complicating efforts to constrain modern day hydroclimate variability as well as paleohydrologic reconstruction for southern South America. In this study, we measured the stable isotope compositions of hydrogen (δ(2)H) and oxygen (δ(18)O) in surface lacustrine waters of central-south Chile to determine what physical and/or climatic features are the dominant controls on lacustrine δ(18)O and δ(2)H composition, assess whether or not the isotopic composition of the lakes record time-averaged isotope composition of meteoric water, and determine whether an isoscape map based on lake surface waters could predict the H and O isotope compositions of precipitation at the few GNIP stations in the region.
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spelling pubmed-80625182021-04-23 Lake water based isoscape in central-south Chile reflects meteoric water Scott, Wesley P. Contreras, Sergio Bowen, Gabriel J. Arnold, T. Elliott Bustamante-Ortega, Ramón Werne, Josef P. Sci Rep Article Warming across the globe is expected to alter the strength and amount of regional precipitation, but there is uncertainty associated with the magnitude of these expected changes, and also how these changes in temperature and the hydrologic cycle will affect humans. For example, the climate in central-south Chile is projected to become significantly warmer and drier over the next several decades in response to anthropogenically driven warming, but these anthropogenic changes are superimposed on natural climate variability. The stable isotope composition of meteoric water provides significant information regarding the moisture source, pathways, and rain-out history of an air mass, but precipitation samples suitable for stable isotope measurements require long-term placement of field equipment making them difficult to obtain. The International Atomic Energy Agency (IAEA) Global Network of Isotopes in Precipitation (GNIP) stations generate isotopic and ancillary data of precipitation from many locations around the world, but remote areas of developing countries like Chile typically have sparse networks of meteorological stations, which inhibit our ability to accurately model regional precipitation. Central-south Chile, in particular, has a sparse network of GNIP stations and, as a result, the isotopic composition of meteoric water is underrepresented in the global database complicating efforts to constrain modern day hydroclimate variability as well as paleohydrologic reconstruction for southern South America. In this study, we measured the stable isotope compositions of hydrogen (δ(2)H) and oxygen (δ(18)O) in surface lacustrine waters of central-south Chile to determine what physical and/or climatic features are the dominant controls on lacustrine δ(18)O and δ(2)H composition, assess whether or not the isotopic composition of the lakes record time-averaged isotope composition of meteoric water, and determine whether an isoscape map based on lake surface waters could predict the H and O isotope compositions of precipitation at the few GNIP stations in the region. Nature Publishing Group UK 2021-04-22 /pmc/articles/PMC8062518/ /pubmed/33888733 http://dx.doi.org/10.1038/s41598-021-87566-4 Text en © The Author(s) 2021, corrected publication 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Scott, Wesley P.
Contreras, Sergio
Bowen, Gabriel J.
Arnold, T. Elliott
Bustamante-Ortega, Ramón
Werne, Josef P.
Lake water based isoscape in central-south Chile reflects meteoric water
title Lake water based isoscape in central-south Chile reflects meteoric water
title_full Lake water based isoscape in central-south Chile reflects meteoric water
title_fullStr Lake water based isoscape in central-south Chile reflects meteoric water
title_full_unstemmed Lake water based isoscape in central-south Chile reflects meteoric water
title_short Lake water based isoscape in central-south Chile reflects meteoric water
title_sort lake water based isoscape in central-south chile reflects meteoric water
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8062518/
https://www.ncbi.nlm.nih.gov/pubmed/33888733
http://dx.doi.org/10.1038/s41598-021-87566-4
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