Modelling water isotopologues (1H2H16O, 1H217O) in the coupled numerical climate model iLOVECLIM (version 1.1.5)

Stable water isotopes are used to infer changes in the hydrological cycle for different climate periods and various climatic archives. Following previous developments of δ18O in the coupled climate model of intermediate complexity, iLOVECLIM, we present here the implementation of the 1H2H16O and 1H2...

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Published in:Geoscientific Model Development
Main Authors: Extier, Thomas, Caley, Thibaut, Roche, Didier M.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2024
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Online Access:https://doi.org/10.5194/gmd-17-2117-2024
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spelling ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00072289 2024-04-14T08:03:45+00:00 Modelling water isotopologues (1H2H16O, 1H217O) in the coupled numerical climate model iLOVECLIM (version 1.1.5) Extier, Thomas Caley, Thibaut Roche, Didier M. 2024-03 electronic https://doi.org/10.5194/gmd-17-2117-2024 https://noa.gwlb.de/receive/cop_mods_00072289 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070510/gmd-17-2117-2024.pdf https://gmd.copernicus.org/articles/17/2117/2024/gmd-17-2117-2024.pdf eng eng Copernicus Publications Geoscientific Model Development -- http://www.bibliothek.uni-regensburg.de/ezeit/?2456725 -- http://www.geosci-model-dev.net/ -- 1991-9603 https://doi.org/10.5194/gmd-17-2117-2024 https://noa.gwlb.de/receive/cop_mods_00072289 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070510/gmd-17-2117-2024.pdf https://gmd.copernicus.org/articles/17/2117/2024/gmd-17-2117-2024.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/gmd-17-2117-2024 2024-03-19T12:18:16Z Stable water isotopes are used to infer changes in the hydrological cycle for different climate periods and various climatic archives. Following previous developments of δ18O in the coupled climate model of intermediate complexity, iLOVECLIM, we present here the implementation of the 1H2H16O and 1H217O water isotopes in the different components of this model and calculate the associated secondary markers deuterium excess (d-excess) and oxygen-17 excess (17O-excess) in the atmosphere and ocean. So far, the latter has only been modelled by the atmospheric model LMDZ4. Results of a 5000-year equilibrium simulation under preindustrial conditions are analysed and compared to observations and several isotope-enabled models for the atmosphere and ocean components. In the atmospheric component, the model correctly reproduces the first-order global distribution of the δ2H and d-excess as observed in the data (R=0.56 for δ2H and 0.36 for d-excess), even if local differences are observed. The model–data correlation is within the range of other water-isotope-enabled general circulation models. The main isotopic effects and the latitudinal gradient are properly modelled, similarly to previous water-isotope-enabled general circulation model simulations, despite a simplified atmospheric component in iLOVECLIM. One exception is observed in Antarctica where the model does not correctly estimate the water isotope composition, a consequence of the non-conservative behaviour of the advection scheme at a very low moisture content. The modelled 17O-excess presents a too-important dispersion of the values in comparison to the observations and is not correctly reproduced in the model, mainly because of the complex processes involved in the 17O-excess isotopic value. For the ocean, the model simulates an adequate isotopic ratio in comparison to the observations, except for local areas such as the surface of the Arabian Sea, a part of the Arctic and the western equatorial Indian Ocean. Data–model evaluation also presents a good match for ... Article in Journal/Newspaper Antarc* Antarctica Arctic Niedersächsisches Online-Archiv NOA Arctic Indian Geoscientific Model Development 17 5 2117 2139
institution Open Polar
collection Niedersächsisches Online-Archiv NOA
op_collection_id ftnonlinearchiv
language English
topic article
Verlagsveröffentlichung
spellingShingle article
Verlagsveröffentlichung
Extier, Thomas
Caley, Thibaut
Roche, Didier M.
Modelling water isotopologues (1H2H16O, 1H217O) in the coupled numerical climate model iLOVECLIM (version 1.1.5)
topic_facet article
Verlagsveröffentlichung
description Stable water isotopes are used to infer changes in the hydrological cycle for different climate periods and various climatic archives. Following previous developments of δ18O in the coupled climate model of intermediate complexity, iLOVECLIM, we present here the implementation of the 1H2H16O and 1H217O water isotopes in the different components of this model and calculate the associated secondary markers deuterium excess (d-excess) and oxygen-17 excess (17O-excess) in the atmosphere and ocean. So far, the latter has only been modelled by the atmospheric model LMDZ4. Results of a 5000-year equilibrium simulation under preindustrial conditions are analysed and compared to observations and several isotope-enabled models for the atmosphere and ocean components. In the atmospheric component, the model correctly reproduces the first-order global distribution of the δ2H and d-excess as observed in the data (R=0.56 for δ2H and 0.36 for d-excess), even if local differences are observed. The model–data correlation is within the range of other water-isotope-enabled general circulation models. The main isotopic effects and the latitudinal gradient are properly modelled, similarly to previous water-isotope-enabled general circulation model simulations, despite a simplified atmospheric component in iLOVECLIM. One exception is observed in Antarctica where the model does not correctly estimate the water isotope composition, a consequence of the non-conservative behaviour of the advection scheme at a very low moisture content. The modelled 17O-excess presents a too-important dispersion of the values in comparison to the observations and is not correctly reproduced in the model, mainly because of the complex processes involved in the 17O-excess isotopic value. For the ocean, the model simulates an adequate isotopic ratio in comparison to the observations, except for local areas such as the surface of the Arabian Sea, a part of the Arctic and the western equatorial Indian Ocean. Data–model evaluation also presents a good match for ...
format Article in Journal/Newspaper
author Extier, Thomas
Caley, Thibaut
Roche, Didier M.
author_facet Extier, Thomas
Caley, Thibaut
Roche, Didier M.
author_sort Extier, Thomas
title Modelling water isotopologues (1H2H16O, 1H217O) in the coupled numerical climate model iLOVECLIM (version 1.1.5)
title_short Modelling water isotopologues (1H2H16O, 1H217O) in the coupled numerical climate model iLOVECLIM (version 1.1.5)
title_full Modelling water isotopologues (1H2H16O, 1H217O) in the coupled numerical climate model iLOVECLIM (version 1.1.5)
title_fullStr Modelling water isotopologues (1H2H16O, 1H217O) in the coupled numerical climate model iLOVECLIM (version 1.1.5)
title_full_unstemmed Modelling water isotopologues (1H2H16O, 1H217O) in the coupled numerical climate model iLOVECLIM (version 1.1.5)
title_sort modelling water isotopologues (1h2h16o, 1h217o) in the coupled numerical climate model iloveclim (version 1.1.5)
publisher Copernicus Publications
publishDate 2024
url https://doi.org/10.5194/gmd-17-2117-2024
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geographic Arctic
Indian
geographic_facet Arctic
Indian
genre Antarc*
Antarctica
Arctic
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Antarctica
Arctic
op_relation Geoscientific Model Development -- http://www.bibliothek.uni-regensburg.de/ezeit/?2456725 -- http://www.geosci-model-dev.net/ -- 1991-9603
https://doi.org/10.5194/gmd-17-2117-2024
https://noa.gwlb.de/receive/cop_mods_00072289
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070510/gmd-17-2117-2024.pdf
https://gmd.copernicus.org/articles/17/2117/2024/gmd-17-2117-2024.pdf
op_rights https://creativecommons.org/licenses/by/4.0/
uneingeschränkt
info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.5194/gmd-17-2117-2024
container_title Geoscientific Model Development
container_volume 17
container_issue 5
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