OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica
<p>Water vapour isotopes are important tools to better understand processes governing the atmospheric hydrological cycle. Their measurement in polar regions is crucial to improve the interpretation of water isotopic records in ice cores. In situ water vapour isotopic monitoring remains challen...
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Copernicus Publications
2025-03-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://amt.copernicus.org/articles/18/1135/2025/amt-18-1135-2025.pdf |
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| author | T. Lauwers E. Fourré O. Jossoud D. Romanini F. Prié G. Nitti M. Casado K. Jaulin M. Miltner M. Miltner M. Farradèche V. Masson-Delmotte A. Landais |
| author_facet | T. Lauwers E. Fourré O. Jossoud D. Romanini F. Prié G. Nitti M. Casado K. Jaulin M. Miltner M. Miltner M. Farradèche V. Masson-Delmotte A. Landais |
| author_sort | T. Lauwers |
| collection | DOAJ |
| description | <p>Water vapour isotopes are important tools to better understand processes governing the atmospheric hydrological cycle. Their measurement in polar regions is crucial to improve the interpretation of water isotopic records in ice cores. In situ water vapour isotopic monitoring remains challenging, especially in dry places of the East Antarctic Plateau, where water mixing ratios can be as low as 10 ppm. We present in this article new commercial laser spectrometers based on the optical-feedback cavity-enhanced absorption spectroscopy (OF–CEAS) technique, adapted for water vapour isotopic measurements in dry regions. We characterise a first instrument adapted for Antarctic coastal monitoring with an optical cavity finesse of 64 000 (ring-down time of 54 <span class="inline-formula">µ</span>s), installed at Dumont d'Urville Station during the summer campaign 2022–2023, and a second instrument with a high finesse of 116 000 (98 <span class="inline-formula">µ</span>s ring-down time), to be deployed inland of East Antarctica. With a drift calibration every 24 h, the stability demonstrated by the high-finesse instrument allows one to study isotopic diurnal cycles down to 10 ppm humidity for <span class="inline-formula"><i>δ</i></span>D and 100 ppm for <span class="inline-formula"><i>δ</i><sup>18</sup></span>O.</p> |
| format | Article |
| id | doaj-art-245e9b3b73f3421cbb0c9f6b33bd0dad |
| institution | DOAJ |
| issn | 1867-1381 1867-8548 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj-art-245e9b3b73f3421cbb0c9f6b33bd0dad2025-08-20T03:16:19ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482025-03-01181135114710.5194/amt-18-1135-2025OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in AntarcticaT. Lauwers0E. Fourré1O. Jossoud2D. Romanini3F. Prié4G. Nitti5M. Casado6K. Jaulin7M. Miltner8M. Miltner9M. Farradèche10V. Masson-Delmotte11A. Landais12Laboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, FranceLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, FranceLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, FranceUniversité Grenoble Alpes, CNRS, LIPhy UMR 5588, 38041 Grenoble, FranceLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, FranceLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, FranceLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, FranceAP2E, 110 av. Galilée, 13290 Aix-en-Provence, FranceUniversité Grenoble Alpes, CNRS, LIPhy UMR 5588, 38041 Grenoble, FranceAP2E, 110 av. Galilée, 13290 Aix-en-Provence, FranceLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, FranceLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, FranceLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ, Paris-Saclay University, 91190 Gif-sur-Yvette, France<p>Water vapour isotopes are important tools to better understand processes governing the atmospheric hydrological cycle. Their measurement in polar regions is crucial to improve the interpretation of water isotopic records in ice cores. In situ water vapour isotopic monitoring remains challenging, especially in dry places of the East Antarctic Plateau, where water mixing ratios can be as low as 10 ppm. We present in this article new commercial laser spectrometers based on the optical-feedback cavity-enhanced absorption spectroscopy (OF–CEAS) technique, adapted for water vapour isotopic measurements in dry regions. We characterise a first instrument adapted for Antarctic coastal monitoring with an optical cavity finesse of 64 000 (ring-down time of 54 <span class="inline-formula">µ</span>s), installed at Dumont d'Urville Station during the summer campaign 2022–2023, and a second instrument with a high finesse of 116 000 (98 <span class="inline-formula">µ</span>s ring-down time), to be deployed inland of East Antarctica. With a drift calibration every 24 h, the stability demonstrated by the high-finesse instrument allows one to study isotopic diurnal cycles down to 10 ppm humidity for <span class="inline-formula"><i>δ</i></span>D and 100 ppm for <span class="inline-formula"><i>δ</i><sup>18</sup></span>O.</p>https://amt.copernicus.org/articles/18/1135/2025/amt-18-1135-2025.pdf |
| spellingShingle | T. Lauwers E. Fourré O. Jossoud D. Romanini F. Prié G. Nitti M. Casado K. Jaulin M. Miltner M. Miltner M. Farradèche V. Masson-Delmotte A. Landais OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica Atmospheric Measurement Techniques |
| title | OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica |
| title_full | OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica |
| title_fullStr | OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica |
| title_full_unstemmed | OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica |
| title_short | OF–CEAS laser spectroscopy to measure water isotopes in dry environments: example of application in Antarctica |
| title_sort | of ceas laser spectroscopy to measure water isotopes in dry environments example of application in antarctica |
| url | https://amt.copernicus.org/articles/18/1135/2025/amt-18-1135-2025.pdf |
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