The CISE-LOCEAN seawater isotopic database (1998–2021)
The characteristics of the CISE-LOCEAN seawater isotope dataset ( δ 18 O, δ 2 H, referred to as δ D) are presented ( https://doi.org/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 δ 18...
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ftdoajarticles:oai:doaj.org/article:5147ec4836a741c8b620e86841cdf3b6 2023-05-15T17:36:44+02:00 The CISE-LOCEAN seawater isotopic database (1998–2021) G. Reverdin C. Waelbroeck C. Pierre C. Akhoudas G. Aloisi M. Benetti B. Bourlès M. Danielsen J. Demange D. Diverrès J.-C. Gascard M.-N. Houssais H. Le Goff P. Lherminier C. Lo Monaco H. Mercier N. Metzl S. Morisset A. Naamar T. Reynaud J.-B. Sallée V. Thierry S. E. Hartman E. W. Mawji S. Olafsdottir T. Kanzow A. Velo A. Voelker I. Yashayaev F. A. Haumann M. J. Leng C. Arrowsmith M. Meredith 2022-06-01T00:00:00Z https://doi.org/10.5194/essd-14-2721-2022 https://doaj.org/article/5147ec4836a741c8b620e86841cdf3b6 EN eng Copernicus Publications https://essd.copernicus.org/articles/14/2721/2022/essd-14-2721-2022.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-14-2721-2022 1866-3508 1866-3516 https://doaj.org/article/5147ec4836a741c8b620e86841cdf3b6 Earth System Science Data, Vol 14, Pp 2721-2735 (2022) Environmental sciences GE1-350 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/essd-14-2721-2022 2022-12-31T02:30:33Z The characteristics of the CISE-LOCEAN seawater isotope dataset ( δ 18 O, δ 2 H, referred to as δ D) are presented ( https://doi.org/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 δ 18 O, three-quarters of them also with δ D, 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 δ 18 O and 0.15 ‰ for δ D. 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 δ 18 O and 0.20 ‰ for δ D. Therefore, combining the two uncertainties suggests a standard deviation of at most 0.05 ‰ for δ 18 O and 0.25 ‰ for δ D. 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 ( δ D − 8× δ 18 O). This adjustment adds an uncertainty in the respective data of roughly 0.05 ‰ for δ 18 O and 0.10 ‰ for δ D. 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 δ 18 O and 0.15 ‰ for δ D. However, 18 comparisons with duplicate seawater data analyzed in other laboratories or with other datasets in the intermediate and deep ocean ... Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Indian Earth System Science Data 14 6 2721 2735 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 G. Reverdin C. Waelbroeck C. Pierre C. Akhoudas G. Aloisi M. Benetti B. Bourlès M. Danielsen J. Demange D. Diverrès J.-C. Gascard M.-N. Houssais H. Le Goff P. Lherminier C. Lo Monaco H. Mercier N. Metzl S. Morisset A. Naamar T. Reynaud J.-B. Sallée V. Thierry S. E. Hartman E. W. Mawji S. Olafsdottir T. Kanzow A. Velo A. Voelker I. Yashayaev F. A. Haumann M. J. Leng C. Arrowsmith M. Meredith The CISE-LOCEAN seawater isotopic database (1998–2021) |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The characteristics of the CISE-LOCEAN seawater isotope dataset ( δ 18 O, δ 2 H, referred to as δ D) are presented ( https://doi.org/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 δ 18 O, three-quarters of them also with δ D, 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 δ 18 O and 0.15 ‰ for δ D. 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 δ 18 O and 0.20 ‰ for δ D. Therefore, combining the two uncertainties suggests a standard deviation of at most 0.05 ‰ for δ 18 O and 0.25 ‰ for δ D. 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 ( δ D − 8× δ 18 O). This adjustment adds an uncertainty in the respective data of roughly 0.05 ‰ for δ 18 O and 0.10 ‰ for δ D. 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 δ 18 O and 0.15 ‰ for δ D. However, 18 comparisons with duplicate seawater data analyzed in other laboratories or with other datasets in the intermediate and deep ocean ... |
format |
Article in Journal/Newspaper |
author |
G. Reverdin C. Waelbroeck C. Pierre C. Akhoudas G. Aloisi M. Benetti B. Bourlès M. Danielsen J. Demange D. Diverrès J.-C. Gascard M.-N. Houssais H. Le Goff P. Lherminier C. Lo Monaco H. Mercier N. Metzl S. Morisset A. Naamar T. Reynaud J.-B. Sallée V. Thierry S. E. Hartman E. W. Mawji S. Olafsdottir T. Kanzow A. Velo A. Voelker I. Yashayaev F. A. Haumann M. J. Leng C. Arrowsmith M. Meredith |
author_facet |
G. Reverdin C. Waelbroeck C. Pierre C. Akhoudas G. Aloisi M. Benetti B. Bourlès M. Danielsen J. Demange D. Diverrès J.-C. Gascard M.-N. Houssais H. Le Goff P. Lherminier C. Lo Monaco H. Mercier N. Metzl S. Morisset A. Naamar T. Reynaud J.-B. Sallée V. Thierry S. E. Hartman E. W. Mawji S. Olafsdottir T. Kanzow A. Velo A. Voelker I. Yashayaev F. A. Haumann M. J. Leng C. Arrowsmith M. Meredith |
author_sort |
G. Reverdin |
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://doi.org/10.5194/essd-14-2721-2022 https://doaj.org/article/5147ec4836a741c8b620e86841cdf3b6 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Earth System Science Data, Vol 14, Pp 2721-2735 (2022) |
op_relation |
https://essd.copernicus.org/articles/14/2721/2022/essd-14-2721-2022.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-14-2721-2022 1866-3508 1866-3516 https://doaj.org/article/5147ec4836a741c8b620e86841cdf3b6 |
op_doi |
https://doi.org/10.5194/essd-14-2721-2022 |
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Earth System Science Data |
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2735 |
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1766136313892831232 |