From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica
In a context of global warming and sea level rise acceleration, it is key to estimate the evolution of the atmospheric hydrological cycle and temperature in polar regions, which directly influence the surface mass balance of the Arctic and Antarctic ice sheets. Direct observations are available from...
Published in: | The Cryosphere |
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070374 2024-01-14T10:00:30+01:00 From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica Leroy-Dos Santos, Christophe Fourré, Elise Agosta, Cécile Casado, Mathieu Cauquoin, Alexandre Werner, Martin Minster, Benedicte Prié, Frédéric Jossoud, Olivier Petit, Leila Landais, Amaëlle 2023-12 electronic https://doi.org/10.5194/tc-17-5241-2023 https://noa.gwlb.de/receive/cop_mods_00070374 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068723/tc-17-5241-2023.pdf https://tc.copernicus.org/articles/17/5241/2023/tc-17-5241-2023.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-5241-2023 https://noa.gwlb.de/receive/cop_mods_00070374 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068723/tc-17-5241-2023.pdf https://tc.copernicus.org/articles/17/5241/2023/tc-17-5241-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/tc-17-5241-2023 2023-12-18T00:22:48Z In a context of global warming and sea level rise acceleration, it is key to estimate the evolution of the atmospheric hydrological cycle and temperature in polar regions, which directly influence the surface mass balance of the Arctic and Antarctic ice sheets. Direct observations are available from satellite data for the last 40 years and a few weather data since the 1950s in Antarctica. One of the best ways to access longer records is to use climate proxies in firn or ice cores. The water isotopic composition in these cores is widely used to reconstruct past temperature variations. We need to progress in our understanding of the influence of the atmospheric hydrological cycle on the water isotopic composition of ice cores. First, we present a 2-year-long time series of vapor and precipitation isotopic composition measurement at Dumont d’Urville Station, in Adélie Land. We characterize diurnal variations of meteorological parameters (temperature, atmospheric water mixing ratio (hereafter humidity) and δ18O) for the different seasons and determine the evolution of key relationships (δ18O versus temperature or humidity) throughout the year: we find that the temperature vs. δ18O relationship is dependent on synoptic events dynamics in winter contrary to summer. Then, this data set is used to evaluate the atmospheric general circulation model ECHAM6-wiso (model version with embedded water stable isotopes) in a coastal region of Adélie Land where local conditions are controlled by strong katabatic winds which directly impact the isotopic signal. We show that a combination of continental (79 %) and oceanic (21 %) grid cells leads model outputs (temperature, humidity and δ18O) to nicely fit the observations, at different timescales (i.e., seasonal to synoptic). Therefore we demonstrate the added value of long-term water vapor isotopic composition records for model evaluation. Then, as a clear link is found between the isotopic composition of water vapor and precipitation, we assess how isotopic models can help ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Global warming The Cryosphere Niedersächsisches Online-Archiv NOA Arctic Antarctic Dumont d’Urville ENVELOPE(140.000,140.000,-66.667,-66.667) The Cryosphere 17 12 5241 5254 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Leroy-Dos Santos, Christophe Fourré, Elise Agosta, Cécile Casado, Mathieu Cauquoin, Alexandre Werner, Martin Minster, Benedicte Prié, Frédéric Jossoud, Olivier Petit, Leila Landais, Amaëlle From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
In a context of global warming and sea level rise acceleration, it is key to estimate the evolution of the atmospheric hydrological cycle and temperature in polar regions, which directly influence the surface mass balance of the Arctic and Antarctic ice sheets. Direct observations are available from satellite data for the last 40 years and a few weather data since the 1950s in Antarctica. One of the best ways to access longer records is to use climate proxies in firn or ice cores. The water isotopic composition in these cores is widely used to reconstruct past temperature variations. We need to progress in our understanding of the influence of the atmospheric hydrological cycle on the water isotopic composition of ice cores. First, we present a 2-year-long time series of vapor and precipitation isotopic composition measurement at Dumont d’Urville Station, in Adélie Land. We characterize diurnal variations of meteorological parameters (temperature, atmospheric water mixing ratio (hereafter humidity) and δ18O) for the different seasons and determine the evolution of key relationships (δ18O versus temperature or humidity) throughout the year: we find that the temperature vs. δ18O relationship is dependent on synoptic events dynamics in winter contrary to summer. Then, this data set is used to evaluate the atmospheric general circulation model ECHAM6-wiso (model version with embedded water stable isotopes) in a coastal region of Adélie Land where local conditions are controlled by strong katabatic winds which directly impact the isotopic signal. We show that a combination of continental (79 %) and oceanic (21 %) grid cells leads model outputs (temperature, humidity and δ18O) to nicely fit the observations, at different timescales (i.e., seasonal to synoptic). Therefore we demonstrate the added value of long-term water vapor isotopic composition records for model evaluation. Then, as a clear link is found between the isotopic composition of water vapor and precipitation, we assess how isotopic models can help ... |
format |
Article in Journal/Newspaper |
author |
Leroy-Dos Santos, Christophe Fourré, Elise Agosta, Cécile Casado, Mathieu Cauquoin, Alexandre Werner, Martin Minster, Benedicte Prié, Frédéric Jossoud, Olivier Petit, Leila Landais, Amaëlle |
author_facet |
Leroy-Dos Santos, Christophe Fourré, Elise Agosta, Cécile Casado, Mathieu Cauquoin, Alexandre Werner, Martin Minster, Benedicte Prié, Frédéric Jossoud, Olivier Petit, Leila Landais, Amaëlle |
author_sort |
Leroy-Dos Santos, Christophe |
title |
From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica |
title_short |
From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica |
title_full |
From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica |
title_fullStr |
From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica |
title_full_unstemmed |
From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica |
title_sort |
from atmospheric water isotopes measurement to firn core interpretation in adélie land: a case study for isotope-enabled atmospheric models in antarctica |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-5241-2023 https://noa.gwlb.de/receive/cop_mods_00070374 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068723/tc-17-5241-2023.pdf https://tc.copernicus.org/articles/17/5241/2023/tc-17-5241-2023.pdf |
long_lat |
ENVELOPE(140.000,140.000,-66.667,-66.667) |
geographic |
Arctic Antarctic Dumont d’Urville |
geographic_facet |
Arctic Antarctic Dumont d’Urville |
genre |
Antarc* Antarctic Antarctica Arctic Global warming The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Arctic Global warming The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-5241-2023 https://noa.gwlb.de/receive/cop_mods_00070374 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068723/tc-17-5241-2023.pdf https://tc.copernicus.org/articles/17/5241/2023/tc-17-5241-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-5241-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
12 |
container_start_page |
5241 |
op_container_end_page |
5254 |
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1788066321744789504 |