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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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/199982 2024-06-23T07:46:39+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. 2024-03-13 https://oskar-bordeaux.fr/handle/20.500.12278/199982 https://hdl.handle.net/20.500.12278/199982 https://doi.org/10.5194/gmd-17-2117-2024 EN eng 1991-959X oai:crossref.org:10.5194/gmd-17-2117-2024 https://oskar-bordeaux.fr/handle/20.500.12278/199982 doi:10.5194/gmd-17-2117-2024 Attribution 3.0 United States open http://creativecommons.org/licenses/by/3.0/us/ CC BY crossref Sciences de l'environnement Article de revue 2024 ftoskarbordeaux https://doi.org/20.500.12278/19998210.5194/gmd-17-2117-2024 2024-05-27T14:03:58Z 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 OSKAR Bordeaux (Open Science Knowledge ARchive) Arctic Indian Geoscientific Model Development 17 5 2117 2139 |
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Open Polar |
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OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Sciences de l'environnement |
spellingShingle |
Sciences de l'environnement 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 |
Sciences de l'environnement |
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) |
publishDate |
2024 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/199982 https://hdl.handle.net/20.500.12278/199982 https://doi.org/10.5194/gmd-17-2117-2024 |
geographic |
Arctic Indian |
geographic_facet |
Arctic Indian |
genre |
Antarc* Antarctica Arctic |
genre_facet |
Antarc* Antarctica Arctic |
op_source |
crossref |
op_relation |
1991-959X oai:crossref.org:10.5194/gmd-17-2117-2024 https://oskar-bordeaux.fr/handle/20.500.12278/199982 doi:10.5194/gmd-17-2117-2024 |
op_rights |
Attribution 3.0 United States open http://creativecommons.org/licenses/by/3.0/us/ CC BY |
op_doi |
https://doi.org/20.500.12278/19998210.5194/gmd-17-2117-2024 |
container_title |
Geoscientific Model Development |
container_volume |
17 |
container_issue |
5 |
container_start_page |
2117 |
op_container_end_page |
2139 |
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1802647266013478912 |