The CISE-LOCEAN seawater isotopic database (1998–2021)
The characteristics of the CISE-LOCEAN seawater isotope dataset (δ18O, δ2H, referred to as δD) are presented (10.17882/71186; Waterisotopes-CISE-LOCEAN, 2021). This dataset covers the time period from 1998 to 2021 and currently includes close to 8000 data entries, all with δ18O, three-quarters of th...
Published in: | Earth System Science Data |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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Copernicus Publications
2022
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Online Access: | https://epic.awi.de/id/eprint/59146/ https://epic.awi.de/id/eprint/59146/1/essd-14-2721-2022.pdf https://doi.org/10.5194/essd-14-2721-2022 https://hdl.handle.net/10013/epic.30e11df5-a140-4d07-945e-ffee8bd26cab |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
The characteristics of the CISE-LOCEAN seawater isotope dataset (δ18O, δ2H, referred to as δD) are presented (10.17882/71186; Waterisotopes-CISE-LOCEAN, 2021). This dataset covers the time period from 1998 to 2021 and currently includes close to 8000 data entries, all with δ18O, three-quarters of them also with δD, associated with a date stamp, space stamp, and usually a salinity measurement. Until 2010, samples were analyzed by isotopic ratio mass spectrometry and since then mostly by cavity ring-down spectroscopy (CRDS). Instrumental uncertainty in this dataset is usually as low as 0.03 ‰ for δ18O and 0.15 ‰ for δD. An additional uncertainty is related to the isotopic composition of the in-house standards that are used to convert data to the Vienna Standard Mean Ocean Water (VSMOW) scale. Different comparisons suggest that since 2010 the latter have remained within at most 0.03 ‰ for δ18O and 0.20 ‰ for δD. Therefore, combining the two uncertainties suggests a standard deviation of at most 0.05 ‰ for δ18O and 0.25 ‰ for δD. For some samples, we find that there has been evaporation during collection and storage, requiring adjustment of the isotopic data produced by CRDS, based on d-excess (δD-8×δ18O). This adjustment adds an uncertainty in the respective data of roughly 0.05 ‰ for δ18O and 0.10 ‰ for δD. This issue of conservation of samples is certainly a strong source of quality loss for parts of the database, and "small"effects may have remained undetected. The internal consistency of the database can be tested for subsets of the dataset when time series can be obtained (such as in the southern Indian Ocean or North Atlantic subpolar gyre). These comparisons suggest that the overall uncertainty of the spatially (for a cruise) or temporally (over a year) averaged data is less than 0.03 ‰ for δ18O and 0.15 ‰ for δD. However, 18 comparisons with duplicate seawater data analyzed in other laboratories or with other datasets in the intermediate and deep ocean suggest a larger scatter. When averaging the 18 ... |
format |
Article in Journal/Newspaper |
author |
Reverdin, Gilles Waelbroeck, Claire Pierre, Catherine Akhoudas, Camille Aloisi, Giovanni Benetti, Marion Bourlès, Bernard Danielsen, Magnus Demange, Jérôme Diverrès, Denis Gascard, Jean-Claude Houssais, Marie-Noëlle Le Goff, Hervé Lherminier, Pascale Monaco, Claire Lo Mercier, Herlé Metzl, Nicolas Morisset, Simon Naamar, Aïcha Reynaud, Thierry Sallée, Jean-Baptiste Thierry, Virginie Hartman, Susan E Mawji, Edward W Olafsdottir, Solveig Kanzow, Torsten Velo, Anton Voelker, Antje Yashayaev, Igor Haumann, F Alexander Leng, Melanie J Arrowsmith, Carol Meredith, Michael |
spellingShingle |
Reverdin, Gilles Waelbroeck, Claire Pierre, Catherine Akhoudas, Camille Aloisi, Giovanni Benetti, Marion Bourlès, Bernard Danielsen, Magnus Demange, Jérôme Diverrès, Denis Gascard, Jean-Claude Houssais, Marie-Noëlle Le Goff, Hervé Lherminier, Pascale Monaco, Claire Lo Mercier, Herlé Metzl, Nicolas Morisset, Simon Naamar, Aïcha Reynaud, Thierry Sallée, Jean-Baptiste Thierry, Virginie Hartman, Susan E Mawji, Edward W Olafsdottir, Solveig Kanzow, Torsten Velo, Anton Voelker, Antje Yashayaev, Igor Haumann, F Alexander Leng, Melanie J Arrowsmith, Carol Meredith, Michael The CISE-LOCEAN seawater isotopic database (1998–2021) |
author_facet |
Reverdin, Gilles Waelbroeck, Claire Pierre, Catherine Akhoudas, Camille Aloisi, Giovanni Benetti, Marion Bourlès, Bernard Danielsen, Magnus Demange, Jérôme Diverrès, Denis Gascard, Jean-Claude Houssais, Marie-Noëlle Le Goff, Hervé Lherminier, Pascale Monaco, Claire Lo Mercier, Herlé Metzl, Nicolas Morisset, Simon Naamar, Aïcha Reynaud, Thierry Sallée, Jean-Baptiste Thierry, Virginie Hartman, Susan E Mawji, Edward W Olafsdottir, Solveig Kanzow, Torsten Velo, Anton Voelker, Antje Yashayaev, Igor Haumann, F Alexander Leng, Melanie J Arrowsmith, Carol Meredith, Michael |
author_sort |
Reverdin, Gilles |
title |
The CISE-LOCEAN seawater isotopic database (1998–2021) |
title_short |
The CISE-LOCEAN seawater isotopic database (1998–2021) |
title_full |
The CISE-LOCEAN seawater isotopic database (1998–2021) |
title_fullStr |
The CISE-LOCEAN seawater isotopic database (1998–2021) |
title_full_unstemmed |
The CISE-LOCEAN seawater isotopic database (1998–2021) |
title_sort |
cise-locean seawater isotopic database (1998–2021) |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/59146/ https://epic.awi.de/id/eprint/59146/1/essd-14-2721-2022.pdf https://doi.org/10.5194/essd-14-2721-2022 https://hdl.handle.net/10013/epic.30e11df5-a140-4d07-945e-ffee8bd26cab |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
EPIC3Earth System Science Data, Copernicus Publications, 14(6), pp. 2721-2735, ISSN: 1866-3508 |
op_relation |
https://epic.awi.de/id/eprint/59146/1/essd-14-2721-2022.pdf Reverdin, G. , Waelbroeck, C. , Pierre, C. , Akhoudas, C. , Aloisi, G. , Benetti, M. , Bourlès, B. , Danielsen, M. , Demange, J. , Diverrès, D. , Gascard, J. C. , Houssais, M. N. , Le Goff, H. , Lherminier, P. , Monaco, C. L. , Mercier, H. , Metzl, N. , Morisset, S. , Naamar, A. , Reynaud, T. , Sallée, J. B. , Thierry, V. , Hartman, S. E. , Mawji, E. W. , Olafsdottir, S. , Kanzow, T. , Velo, A. , Voelker, A. , Yashayaev, I. , Haumann, F. A. , Leng, M. J. , Arrowsmith, C. and Meredith, M. (2022) The CISE-LOCEAN seawater isotopic database (1998–2021) , Earth System Science Data, 14 (6), pp. 2721-2735 . doi:10.5194/essd-14-2721-2022 <https://doi.org/10.5194/essd-14-2721-2022> , hdl:10013/epic.30e11df5-a140-4d07-945e-ffee8bd26cab |
op_doi |
https://doi.org/10.5194/essd-14-2721-2022 |
container_title |
Earth System Science Data |
container_volume |
14 |
container_issue |
6 |
container_start_page |
2721 |
op_container_end_page |
2735 |
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1810464666051149824 |
spelling |
ftawi:oai:epic.awi.de:59146 2024-09-15T18:24:20+00:00 The CISE-LOCEAN seawater isotopic database (1998–2021) Reverdin, Gilles Waelbroeck, Claire Pierre, Catherine Akhoudas, Camille Aloisi, Giovanni Benetti, Marion Bourlès, Bernard Danielsen, Magnus Demange, Jérôme Diverrès, Denis Gascard, Jean-Claude Houssais, Marie-Noëlle Le Goff, Hervé Lherminier, Pascale Monaco, Claire Lo Mercier, Herlé Metzl, Nicolas Morisset, Simon Naamar, Aïcha Reynaud, Thierry Sallée, Jean-Baptiste Thierry, Virginie Hartman, Susan E Mawji, Edward W Olafsdottir, Solveig Kanzow, Torsten Velo, Anton Voelker, Antje Yashayaev, Igor Haumann, F Alexander Leng, Melanie J Arrowsmith, Carol Meredith, Michael 2022-06-10 application/pdf https://epic.awi.de/id/eprint/59146/ https://epic.awi.de/id/eprint/59146/1/essd-14-2721-2022.pdf https://doi.org/10.5194/essd-14-2721-2022 https://hdl.handle.net/10013/epic.30e11df5-a140-4d07-945e-ffee8bd26cab unknown Copernicus Publications https://epic.awi.de/id/eprint/59146/1/essd-14-2721-2022.pdf Reverdin, G. , Waelbroeck, C. , Pierre, C. , Akhoudas, C. , Aloisi, G. , Benetti, M. , Bourlès, B. , Danielsen, M. , Demange, J. , Diverrès, D. , Gascard, J. C. , Houssais, M. N. , Le Goff, H. , Lherminier, P. , Monaco, C. L. , Mercier, H. , Metzl, N. , Morisset, S. , Naamar, A. , Reynaud, T. , Sallée, J. B. , Thierry, V. , Hartman, S. E. , Mawji, E. W. , Olafsdottir, S. , Kanzow, T. , Velo, A. , Voelker, A. , Yashayaev, I. , Haumann, F. A. , Leng, M. J. , Arrowsmith, C. and Meredith, M. (2022) The CISE-LOCEAN seawater isotopic database (1998–2021) , Earth System Science Data, 14 (6), pp. 2721-2735 . doi:10.5194/essd-14-2721-2022 <https://doi.org/10.5194/essd-14-2721-2022> , hdl:10013/epic.30e11df5-a140-4d07-945e-ffee8bd26cab EPIC3Earth System Science Data, Copernicus Publications, 14(6), pp. 2721-2735, ISSN: 1866-3508 Article isiRev 2022 ftawi https://doi.org/10.5194/essd-14-2721-2022 2024-09-02T14:07:29Z The characteristics of the CISE-LOCEAN seawater isotope dataset (δ18O, δ2H, referred to as δD) are presented (10.17882/71186; Waterisotopes-CISE-LOCEAN, 2021). This dataset covers the time period from 1998 to 2021 and currently includes close to 8000 data entries, all with δ18O, three-quarters of them also with δD, associated with a date stamp, space stamp, and usually a salinity measurement. Until 2010, samples were analyzed by isotopic ratio mass spectrometry and since then mostly by cavity ring-down spectroscopy (CRDS). Instrumental uncertainty in this dataset is usually as low as 0.03 ‰ for δ18O and 0.15 ‰ for δD. An additional uncertainty is related to the isotopic composition of the in-house standards that are used to convert data to the Vienna Standard Mean Ocean Water (VSMOW) scale. Different comparisons suggest that since 2010 the latter have remained within at most 0.03 ‰ for δ18O and 0.20 ‰ for δD. Therefore, combining the two uncertainties suggests a standard deviation of at most 0.05 ‰ for δ18O and 0.25 ‰ for δD. For some samples, we find that there has been evaporation during collection and storage, requiring adjustment of the isotopic data produced by CRDS, based on d-excess (δD-8×δ18O). This adjustment adds an uncertainty in the respective data of roughly 0.05 ‰ for δ18O and 0.10 ‰ for δD. This issue of conservation of samples is certainly a strong source of quality loss for parts of the database, and "small"effects may have remained undetected. The internal consistency of the database can be tested for subsets of the dataset when time series can be obtained (such as in the southern Indian Ocean or North Atlantic subpolar gyre). These comparisons suggest that the overall uncertainty of the spatially (for a cruise) or temporally (over a year) averaged data is less than 0.03 ‰ for δ18O and 0.15 ‰ for δD. However, 18 comparisons with duplicate seawater data analyzed in other laboratories or with other datasets in the intermediate and deep ocean suggest a larger scatter. When averaging the 18 ... Article in Journal/Newspaper North Atlantic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Earth System Science Data 14 6 2721 2735 |