Articles | Volume 24, issue 8
https://doi.org/10.5194/acp-24-4611-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-4611-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 Apr 2024
Research article |
| 18 Apr 2024
| 18 Apr 2024
Abrupt excursions in water vapor isotopic variability at the Pointe Benedicte observatory on Amsterdam Island
Amaelle Landais
CORRESPONDING AUTHOR
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Françoise Vimeux
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
HydroSciences Montpellier (HSM), UMR 5569 (UM, CNRS, IRD), 34095 Montpellier, France
Olivier Magand
Observatoire des Sciences de l'Univers de La Réunion (OSU-Réunion), UAR 3365, Université de La Réunion, CNRS, IRD, Météo France, Saint-Denis, La Réunion, France
Cyrielle Solis
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Alexandre Cauquoin
Institute of Industrial Science (IIS), The University of Tokyo, Kashiwa, Japan
Niels Dutrievoz
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Camille Risi
Laboratoire de Météorologie Dynamique, Institut Pierre – Simon Laplace, Sorbonne Université/CNRS/École Polytechnique – IPP, Paris, France
Christophe Leroy-Dos Santos
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Elise Fourré
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Olivier Cattani
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Olivier Jossoud
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Bénédicte Minster
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Frédéric Prié
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Mathieu Casado
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Aurélien Dommergue
Univ. Grenoble Alpes, CNRS, INRAE, IRD, Grenoble INP, IGE, 38000 Grenoble, France
Yann Bertrand
Univ. Grenoble Alpes, CNRS, INRAE, IRD, Grenoble INP, IGE, 38000 Grenoble, France
Martin Werner
Alfred Wegener Institute, Helmholtz Centre for Marine and Polar Research, 27570 Bremerhaven, Germany
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Cited
3 citations as recorded by crossref.
- OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica T. Lauwers et al. 10.5194/amt-18-1135-2025
- Toward a process-oriented understanding of water in the climate system: recent insights from stable isotopes A. Bailey et al. 10.1088/2752-5295/ada17b
- Abrupt excursions in water vapor isotopic variability at the Pointe Benedicte observatory on Amsterdam Island A. Landais et al. 10.5194/acp-24-4611-2024
2 citations as recorded by crossref.
- OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica T. Lauwers et al. 10.5194/amt-18-1135-2025
- Toward a process-oriented understanding of water in the climate system: recent insights from stable isotopes A. Bailey et al. 10.1088/2752-5295/ada17b
Latest update: 17 Apr 2025
Short summary
We have monitored water vapor isotopes since January 2020 on Amsterdam Island in the Indian Ocean. We show 11 periods associated with abrupt negative excursions of water vapor δ18Ο. Six of these events show a decrease in gaseous elemental mercury, suggesting subsidence of air from a higher altitude. Accurately representing the water isotopic signal during these cold fronts is a real challenge for the atmospheric components of Earth system models equipped with water isotopes.
We have monitored water vapor isotopes since January 2020 on Amsterdam Island in the Indian...
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