Water Isotopic Signature of Surface Snow Metamorphism in Antarctica
Water isotope ratios of ice cores are a key source of information on past temperatures. Through fractionation within the hydrological cycle, temperature is imprinted in the water isotopic composition of snowfalls. However, this signal of climatic interest is modified after deposition when snow remai...
Published in: | Geophysical Research Letters |
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ftsubggeo:oai:e-docs.geo-leo.de:11858/9846 2023-05-15T13:42:31+02:00 Water Isotopic Signature of Surface Snow Metamorphism in Antarctica Casado, Mathieu Landais, Amaelle Picard, Ghislain Arnaud, Laurent Dreossi, Giuliano Stenni, Barbara Prié, Frederic Landais, Amaelle; 1 Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA‐CNRS‐UVSQ, Université Paris‐Saclay Gif sur Yvette France Picard, Ghislain; 4 Institut des Geosciences de l'Environnement (IGE) Université Grenoble Alpes / CNRS, UMR 5001 Grenoble France Arnaud, Laurent; 4 Institut des Geosciences de l'Environnement (IGE) Université Grenoble Alpes / CNRS, UMR 5001 Grenoble France Dreossi, Giuliano; 5 Institute of Polar Sciences Consiglio Nazionale delle Ricerche Mestre‐Venezia Italy Stenni, Barbara; 6 Dipartimento di Scienze Ambientali, Informatica e Statistica DAIS Ca'Foscari University of Venice Mestre‐Venezia Italy Prié, Frederic; 1 Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA‐CNRS‐UVSQ, Université Paris‐Saclay Gif sur Yvette France 2021-09-03 https://doi.org/10.1029/2021GL093382 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9846 eng eng doi:10.1029/2021GL093382 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9846 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY ddc:551.31 ddc:551.9 excess Ice cores metamorhism Paleoclimate water isotopes doc-type:article 2021 ftsubggeo https://doi.org/10.1029/2021GL093382 2022-11-09T06:51:42Z Water isotope ratios of ice cores are a key source of information on past temperatures. Through fractionation within the hydrological cycle, temperature is imprinted in the water isotopic composition of snowfalls. However, this signal of climatic interest is modified after deposition when snow remains at the surface exposed to the atmosphere. Comparing time series of surface snow isotopic composition at Dome C with satellite observations of surface snow metamorphism, we found that long summer periods without precipitation favor surface snow metamorphism altering the surface snow isotopic composition. Using excess parameters (combining D,17O, and 18O fractions) allow the identification of this alteration caused by sublimation and condensation of surface hoar. The combined measurement of all three isotopic compositions could help identifying ice core sections influenced by snow metamorphism in sites with very low snow accumulation. Plain Language Summary: Water isotopes in ice core records are often used to reconstruct past climate temperature variations. Classically, the temperature signal is thought to be imprinted in water isotopes of precipitation, and then archived in the ice core as it falls, and in cold areas of Antarctica, piles up for very long period. Here, we show that the surface snow isotopic composition varies in between precipitation events, suggesting that there might be more than one contribution to the isotopic signal in ice core records. This is particularly important for low accumulation sites, where the snow at the surface remains exposed for very long time periods. The combined use of several isotopic ratios in surface snow helps us disentangle the processes that create this signal. Key Points: During summer without precipitation, intense snow metamorphism shows a strong water isotopic signature. During summer without precipitation, intense snow metamorphism shows a strong water isotopic signature. The d‐excess and 17O‐excess of the snow is a proxy of snow metamorphism for low ... Article in Journal/Newspaper Antarc* Antarctica ice core GEO-LEOe-docs (FID GEO) Geophysical Research Letters 48 17 |
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GEO-LEOe-docs (FID GEO) |
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English |
topic |
ddc:551.31 ddc:551.9 excess Ice cores metamorhism Paleoclimate water isotopes |
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ddc:551.31 ddc:551.9 excess Ice cores metamorhism Paleoclimate water isotopes Casado, Mathieu Landais, Amaelle Picard, Ghislain Arnaud, Laurent Dreossi, Giuliano Stenni, Barbara Prié, Frederic Landais, Amaelle; 1 Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA‐CNRS‐UVSQ, Université Paris‐Saclay Gif sur Yvette France Picard, Ghislain; 4 Institut des Geosciences de l'Environnement (IGE) Université Grenoble Alpes / CNRS, UMR 5001 Grenoble France Arnaud, Laurent; 4 Institut des Geosciences de l'Environnement (IGE) Université Grenoble Alpes / CNRS, UMR 5001 Grenoble France Dreossi, Giuliano; 5 Institute of Polar Sciences Consiglio Nazionale delle Ricerche Mestre‐Venezia Italy Stenni, Barbara; 6 Dipartimento di Scienze Ambientali, Informatica e Statistica DAIS Ca'Foscari University of Venice Mestre‐Venezia Italy Prié, Frederic; 1 Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA‐CNRS‐UVSQ, Université Paris‐Saclay Gif sur Yvette France Water Isotopic Signature of Surface Snow Metamorphism in Antarctica |
topic_facet |
ddc:551.31 ddc:551.9 excess Ice cores metamorhism Paleoclimate water isotopes |
description |
Water isotope ratios of ice cores are a key source of information on past temperatures. Through fractionation within the hydrological cycle, temperature is imprinted in the water isotopic composition of snowfalls. However, this signal of climatic interest is modified after deposition when snow remains at the surface exposed to the atmosphere. Comparing time series of surface snow isotopic composition at Dome C with satellite observations of surface snow metamorphism, we found that long summer periods without precipitation favor surface snow metamorphism altering the surface snow isotopic composition. Using excess parameters (combining D,17O, and 18O fractions) allow the identification of this alteration caused by sublimation and condensation of surface hoar. The combined measurement of all three isotopic compositions could help identifying ice core sections influenced by snow metamorphism in sites with very low snow accumulation. Plain Language Summary: Water isotopes in ice core records are often used to reconstruct past climate temperature variations. Classically, the temperature signal is thought to be imprinted in water isotopes of precipitation, and then archived in the ice core as it falls, and in cold areas of Antarctica, piles up for very long period. Here, we show that the surface snow isotopic composition varies in between precipitation events, suggesting that there might be more than one contribution to the isotopic signal in ice core records. This is particularly important for low accumulation sites, where the snow at the surface remains exposed for very long time periods. The combined use of several isotopic ratios in surface snow helps us disentangle the processes that create this signal. Key Points: During summer without precipitation, intense snow metamorphism shows a strong water isotopic signature. During summer without precipitation, intense snow metamorphism shows a strong water isotopic signature. The d‐excess and 17O‐excess of the snow is a proxy of snow metamorphism for low ... |
format |
Article in Journal/Newspaper |
author |
Casado, Mathieu Landais, Amaelle Picard, Ghislain Arnaud, Laurent Dreossi, Giuliano Stenni, Barbara Prié, Frederic Landais, Amaelle; 1 Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA‐CNRS‐UVSQ, Université Paris‐Saclay Gif sur Yvette France Picard, Ghislain; 4 Institut des Geosciences de l'Environnement (IGE) Université Grenoble Alpes / CNRS, UMR 5001 Grenoble France Arnaud, Laurent; 4 Institut des Geosciences de l'Environnement (IGE) Université Grenoble Alpes / CNRS, UMR 5001 Grenoble France Dreossi, Giuliano; 5 Institute of Polar Sciences Consiglio Nazionale delle Ricerche Mestre‐Venezia Italy Stenni, Barbara; 6 Dipartimento di Scienze Ambientali, Informatica e Statistica DAIS Ca'Foscari University of Venice Mestre‐Venezia Italy Prié, Frederic; 1 Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA‐CNRS‐UVSQ, Université Paris‐Saclay Gif sur Yvette France |
author_facet |
Casado, Mathieu Landais, Amaelle Picard, Ghislain Arnaud, Laurent Dreossi, Giuliano Stenni, Barbara Prié, Frederic Landais, Amaelle; 1 Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA‐CNRS‐UVSQ, Université Paris‐Saclay Gif sur Yvette France Picard, Ghislain; 4 Institut des Geosciences de l'Environnement (IGE) Université Grenoble Alpes / CNRS, UMR 5001 Grenoble France Arnaud, Laurent; 4 Institut des Geosciences de l'Environnement (IGE) Université Grenoble Alpes / CNRS, UMR 5001 Grenoble France Dreossi, Giuliano; 5 Institute of Polar Sciences Consiglio Nazionale delle Ricerche Mestre‐Venezia Italy Stenni, Barbara; 6 Dipartimento di Scienze Ambientali, Informatica e Statistica DAIS Ca'Foscari University of Venice Mestre‐Venezia Italy Prié, Frederic; 1 Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA‐CNRS‐UVSQ, Université Paris‐Saclay Gif sur Yvette France |
author_sort |
Casado, Mathieu |
title |
Water Isotopic Signature of Surface Snow Metamorphism in Antarctica |
title_short |
Water Isotopic Signature of Surface Snow Metamorphism in Antarctica |
title_full |
Water Isotopic Signature of Surface Snow Metamorphism in Antarctica |
title_fullStr |
Water Isotopic Signature of Surface Snow Metamorphism in Antarctica |
title_full_unstemmed |
Water Isotopic Signature of Surface Snow Metamorphism in Antarctica |
title_sort |
water isotopic signature of surface snow metamorphism in antarctica |
publishDate |
2021 |
url |
https://doi.org/10.1029/2021GL093382 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9846 |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_relation |
doi:10.1029/2021GL093382 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9846 |
op_rights |
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2021GL093382 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
17 |
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1766168940972605440 |