CARINA oxygen data in the Atlantic Ocean
In the CARINA (Carbon dioxide in the Atlantic Ocean) project, a new dataset with many previously unpublished hydrographic data from the Atlantic, Arctic and Southern Ocean was assembled and subjected to careful quality control (QC) procedures. Here, we present the dissolved oxygen measurements in th...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/15933 2023-05-15T15:18:29+02:00 CARINA oxygen data in the Atlantic Ocean Stendardo, Ilaria Gruber, Nicolas Körtzinger, Arne 2009-12-23 application/application/pdf https://hdl.handle.net/20.500.11850/15933 https://doi.org/10.3929/ethz-b-000015933 en eng Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/essd-1-87-2009 http://hdl.handle.net/20.500.11850/15933 doi:10.3929/ethz-b-000015933 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 Unported CC-BY Earth System Science Data, 1 (1) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2009 ftethz https://doi.org/20.500.11850/15933 https://doi.org/10.3929/ethz-b-000015933 https://doi.org/10.5194/essd-1-87-2009 2022-04-25T13:55:51Z In the CARINA (Carbon dioxide in the Atlantic Ocean) project, a new dataset with many previously unpublished hydrographic data from the Atlantic, Arctic and Southern Ocean was assembled and subjected to careful quality control (QC) procedures. Here, we present the dissolved oxygen measurements in the Atlantic region of the dataset and describe in detail the secondary QC procedures that aim to ensure that the data are internally consistent. This is achieved by a cross-over analysis, i.e. the comparison of deep ocean data at places that were sampled by different cruises at different times. Initial adjustments to the individual cruises were then determined by an inverse procedure that computes a set of adjustments that requires the minimum amount of adjustment and at the same time reduces the offsets in an optimal manner. The initial adjustments were then reviewed by the CARINA members, and only those that passed the following two criteria were adopted: (i) the region is not subject to substantial temporal variability, and (ii) the adjustment must be based on at least three stations from each cruise. No adjustment was recommended for cruises that did not fit these criteria. The final CARINA-Oxygen dataset has 103414 oxygen samples from 9491 stations obtained during 98 cruises covering three decades. The sampling density of the oxygen data is particularly good in the North Atlantic north of about 40° N especially after 1987. In contrast, the sample density in the South Atlantic is much lower. Some cruises appear to have poor data quality, and were subsequently omitted from the adjusted dataset. Of the data included in the adjusted dataset, 20% were adjusted with a mean adjustment of 2%. Due to the achieved internal consistency, the resulting product is well suited to produce an improved climatology or to study long-term changes in the oxygen content of the ocean. However, the adjusted dataset is not necessarily better suited than the unadjusted data to address questions that require a high level of accuracy, such as the computation of the saturation state. ISSN:1866-3516 ISSN:1866-3508 Article in Journal/Newspaper Arctic Atlantic Arctic Atlantic-Arctic North Atlantic Southern Ocean ETH Zürich Research Collection Arctic Southern Ocean |
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Open Polar |
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ETH Zürich Research Collection |
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ftethz |
language |
English |
description |
In the CARINA (Carbon dioxide in the Atlantic Ocean) project, a new dataset with many previously unpublished hydrographic data from the Atlantic, Arctic and Southern Ocean was assembled and subjected to careful quality control (QC) procedures. Here, we present the dissolved oxygen measurements in the Atlantic region of the dataset and describe in detail the secondary QC procedures that aim to ensure that the data are internally consistent. This is achieved by a cross-over analysis, i.e. the comparison of deep ocean data at places that were sampled by different cruises at different times. Initial adjustments to the individual cruises were then determined by an inverse procedure that computes a set of adjustments that requires the minimum amount of adjustment and at the same time reduces the offsets in an optimal manner. The initial adjustments were then reviewed by the CARINA members, and only those that passed the following two criteria were adopted: (i) the region is not subject to substantial temporal variability, and (ii) the adjustment must be based on at least three stations from each cruise. No adjustment was recommended for cruises that did not fit these criteria. The final CARINA-Oxygen dataset has 103414 oxygen samples from 9491 stations obtained during 98 cruises covering three decades. The sampling density of the oxygen data is particularly good in the North Atlantic north of about 40° N especially after 1987. In contrast, the sample density in the South Atlantic is much lower. Some cruises appear to have poor data quality, and were subsequently omitted from the adjusted dataset. Of the data included in the adjusted dataset, 20% were adjusted with a mean adjustment of 2%. Due to the achieved internal consistency, the resulting product is well suited to produce an improved climatology or to study long-term changes in the oxygen content of the ocean. However, the adjusted dataset is not necessarily better suited than the unadjusted data to address questions that require a high level of accuracy, such as the computation of the saturation state. ISSN:1866-3516 ISSN:1866-3508 |
format |
Article in Journal/Newspaper |
author |
Stendardo, Ilaria Gruber, Nicolas Körtzinger, Arne |
spellingShingle |
Stendardo, Ilaria Gruber, Nicolas Körtzinger, Arne CARINA oxygen data in the Atlantic Ocean |
author_facet |
Stendardo, Ilaria Gruber, Nicolas Körtzinger, Arne |
author_sort |
Stendardo, Ilaria |
title |
CARINA oxygen data in the Atlantic Ocean |
title_short |
CARINA oxygen data in the Atlantic Ocean |
title_full |
CARINA oxygen data in the Atlantic Ocean |
title_fullStr |
CARINA oxygen data in the Atlantic Ocean |
title_full_unstemmed |
CARINA oxygen data in the Atlantic Ocean |
title_sort |
carina oxygen data in the atlantic ocean |
publisher |
Copernicus |
publishDate |
2009 |
url |
https://hdl.handle.net/20.500.11850/15933 https://doi.org/10.3929/ethz-b-000015933 |
geographic |
Arctic Southern Ocean |
geographic_facet |
Arctic Southern Ocean |
genre |
Arctic Atlantic Arctic Atlantic-Arctic North Atlantic Southern Ocean |
genre_facet |
Arctic Atlantic Arctic Atlantic-Arctic North Atlantic Southern Ocean |
op_source |
Earth System Science Data, 1 (1) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/essd-1-87-2009 http://hdl.handle.net/20.500.11850/15933 doi:10.3929/ethz-b-000015933 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 Unported |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/15933 https://doi.org/10.3929/ethz-b-000015933 https://doi.org/10.5194/essd-1-87-2009 |
_version_ |
1766348680617525248 |