Surface studies of water isotopes in Antarctica for quantitative interpretation of deep ice core data
International audience Polar ice cores are unique climate archives. Indeed, most of them have a continuous stratigraphy and present high temporal resolution of many climate variables in a single archive. While water isotopic records (δD or δ18O) in ice cores are often taken as references for past at...
Published in: | Comptes Rendus Geoscience |
---|---|
Main Authors: | , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2017
|
Subjects: | |
Online Access: | https://hal.science/hal-03105281 https://hal.science/hal-03105281/document https://hal.science/hal-03105281/file/1-s2.0-S1631071317300494-main%282%29.pdf https://doi.org/10.1016/J.CRTE.2017.05.003 |
id |
ftceafr:oai:HAL:hal-03105281v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Landais, Amaelle Casado, Mathieu Prié, Frédéric Magand, Olivier Arnaud, Laurent Ekaykin, Alexey Petit, Jean-Robert Picard, Ghislain Fily, Michel Minster, Bénédicte Touzeau, Alexandra Goursaud, Sentia Masson-Delmotte, Valérie Jouzel, Jean Orsi, Anaïs Surface studies of water isotopes in Antarctica for quantitative interpretation of deep ice core data |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Polar ice cores are unique climate archives. Indeed, most of them have a continuous stratigraphy and present high temporal resolution of many climate variables in a single archive. While water isotopic records (δD or δ18O) in ice cores are often taken as references for past atmospheric temperature variations, their relationship to temperature is associated with a large uncertainty. Several reasons are invoked to explain the limitation of such an approach; in particular, post-deposition effects are important in East Antarctica because of the low accumulation rates. The strong influence of post-deposition processes highlights the need for surface polar research programs in addition to deep drilling programs. We present here new results on water isotopes from several recent surface programs, mostly over East Antarctica. Together with previously published data, the new data presented in this study have several implications for the climatic reconstructions based on ice core isotopic data: (1) The spatial relationship between surface mean temperature and mean snow isotopic composition over the first meters in depth can be explained quite straightforwardly using simple isotopic models tuned to d-excess vs. δ18O evolution in transects on the East Antarctic sector. The observed spatial slopes are significantly higher (∼ 0.7–0.8‰·°C−1 for δ18O vs. temperature) than seasonal slopes inferred from precipitation data at Vostok and Dome C (0.35 to 0.46‰·°C−1). We explain these differences by changes in condensation versus surface temperature between summer and winter in the central East Antarctic plateau, where the inversion layer vanishes in summer. (2) Post-deposition effects linked to exchanges between the snow surface and the atmospheric water vapor lead to an evolution of δ18O in the surface snow, even in the absence of any precipitation event. This evolution preserves the positive correlation between the δ18O of snow and surface temperature, but is associated with a much slower ... |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Arctic and Antarctic Research Institute (AARI) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) |
format |
Article in Journal/Newspaper |
author |
Landais, Amaelle Casado, Mathieu Prié, Frédéric Magand, Olivier Arnaud, Laurent Ekaykin, Alexey Petit, Jean-Robert Picard, Ghislain Fily, Michel Minster, Bénédicte Touzeau, Alexandra Goursaud, Sentia Masson-Delmotte, Valérie Jouzel, Jean Orsi, Anaïs |
author_facet |
Landais, Amaelle Casado, Mathieu Prié, Frédéric Magand, Olivier Arnaud, Laurent Ekaykin, Alexey Petit, Jean-Robert Picard, Ghislain Fily, Michel Minster, Bénédicte Touzeau, Alexandra Goursaud, Sentia Masson-Delmotte, Valérie Jouzel, Jean Orsi, Anaïs |
author_sort |
Landais, Amaelle |
title |
Surface studies of water isotopes in Antarctica for quantitative interpretation of deep ice core data |
title_short |
Surface studies of water isotopes in Antarctica for quantitative interpretation of deep ice core data |
title_full |
Surface studies of water isotopes in Antarctica for quantitative interpretation of deep ice core data |
title_fullStr |
Surface studies of water isotopes in Antarctica for quantitative interpretation of deep ice core data |
title_full_unstemmed |
Surface studies of water isotopes in Antarctica for quantitative interpretation of deep ice core data |
title_sort |
surface studies of water isotopes in antarctica for quantitative interpretation of deep ice core data |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-03105281 https://hal.science/hal-03105281/document https://hal.science/hal-03105281/file/1-s2.0-S1631071317300494-main%282%29.pdf https://doi.org/10.1016/J.CRTE.2017.05.003 |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core |
op_source |
Comptes Rendus Géoscience https://hal.science/hal-03105281 Comptes Rendus Géoscience, 2017, 349 (4), pp.139-150. ⟨10.1016/J.CRTE.2017.05.003⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/J.CRTE.2017.05.003 hal-03105281 https://hal.science/hal-03105281 https://hal.science/hal-03105281/document https://hal.science/hal-03105281/file/1-s2.0-S1631071317300494-main%282%29.pdf doi:10.1016/J.CRTE.2017.05.003 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/J.CRTE.2017.05.003 |
container_title |
Comptes Rendus Geoscience |
container_volume |
349 |
container_issue |
4 |
container_start_page |
139 |
op_container_end_page |
150 |
_version_ |
1801374444300533760 |
spelling |
ftceafr:oai:HAL:hal-03105281v1 2024-06-09T07:38:40+00:00 Surface studies of water isotopes in Antarctica for quantitative interpretation of deep ice core data Landais, Amaelle Casado, Mathieu Prié, Frédéric Magand, Olivier Arnaud, Laurent Ekaykin, Alexey Petit, Jean-Robert Picard, Ghislain Fily, Michel Minster, Bénédicte Touzeau, Alexandra Goursaud, Sentia Masson-Delmotte, Valérie Jouzel, Jean Orsi, Anaïs Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Arctic and Antarctic Research Institute (AARI) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) 2017-07 https://hal.science/hal-03105281 https://hal.science/hal-03105281/document https://hal.science/hal-03105281/file/1-s2.0-S1631071317300494-main%282%29.pdf https://doi.org/10.1016/J.CRTE.2017.05.003 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/J.CRTE.2017.05.003 hal-03105281 https://hal.science/hal-03105281 https://hal.science/hal-03105281/document https://hal.science/hal-03105281/file/1-s2.0-S1631071317300494-main%282%29.pdf doi:10.1016/J.CRTE.2017.05.003 info:eu-repo/semantics/OpenAccess Comptes Rendus Géoscience https://hal.science/hal-03105281 Comptes Rendus Géoscience, 2017, 349 (4), pp.139-150. ⟨10.1016/J.CRTE.2017.05.003⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2017 ftceafr https://doi.org/10.1016/J.CRTE.2017.05.003 2024-05-16T14:15:40Z International audience Polar ice cores are unique climate archives. Indeed, most of them have a continuous stratigraphy and present high temporal resolution of many climate variables in a single archive. While water isotopic records (δD or δ18O) in ice cores are often taken as references for past atmospheric temperature variations, their relationship to temperature is associated with a large uncertainty. Several reasons are invoked to explain the limitation of such an approach; in particular, post-deposition effects are important in East Antarctica because of the low accumulation rates. The strong influence of post-deposition processes highlights the need for surface polar research programs in addition to deep drilling programs. We present here new results on water isotopes from several recent surface programs, mostly over East Antarctica. Together with previously published data, the new data presented in this study have several implications for the climatic reconstructions based on ice core isotopic data: (1) The spatial relationship between surface mean temperature and mean snow isotopic composition over the first meters in depth can be explained quite straightforwardly using simple isotopic models tuned to d-excess vs. δ18O evolution in transects on the East Antarctic sector. The observed spatial slopes are significantly higher (∼ 0.7–0.8‰·°C−1 for δ18O vs. temperature) than seasonal slopes inferred from precipitation data at Vostok and Dome C (0.35 to 0.46‰·°C−1). We explain these differences by changes in condensation versus surface temperature between summer and winter in the central East Antarctic plateau, where the inversion layer vanishes in summer. (2) Post-deposition effects linked to exchanges between the snow surface and the atmospheric water vapor lead to an evolution of δ18O in the surface snow, even in the absence of any precipitation event. This evolution preserves the positive correlation between the δ18O of snow and surface temperature, but is associated with a much slower ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Antarctic East Antarctica Comptes Rendus Geoscience 349 4 139 150 |