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In the CARINA (Carbon dioxide in the Atlantic Ocean) project, a new dataset with many previously unpublished hydrographic data from the Atlantic, Arctic and Southern Ocean was assembled and subjected to careful quality control (QC) procedures.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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ftdoajarticles:oai:doaj.org/article:1b9a5709fdfd4cedb0b4d677dc7de39e 2023-05-15T15:18:11+02:00 CARINA oxygen data in the Atlantic Ocean I. Stendardo N. Gruber A. Körtzinger 2009-12-01T00:00:00Z https://doaj.org/article/1b9a5709fdfd4cedb0b4d677dc7de39e EN eng Copernicus Publications http://www.earth-syst-sci-data.net/1/87/2009/essd-1-87-2009.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 1866-3508 1866-3516 https://doaj.org/article/1b9a5709fdfd4cedb0b4d677dc7de39e Earth System Science Data, Vol 1, Iss 1, Pp 87-100 (2009) Environmental sciences GE1-350 Geology QE1-996.5 article 2009 ftdoajarticles 2022-12-31T09:11:42Z In the CARINA (Carbon dioxide in the Atlantic Ocean) project, a new dataset with many previously unpublished hydrographic data from the Atlantic, Arctic and Southern Ocean was assembled and subjected to careful quality control (QC) procedures.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 ... Article in Journal/Newspaper Arctic Atlantic Arctic Atlantic-Arctic North Atlantic Southern Ocean Directory of Open Access Journals: DOAJ Articles Arctic Southern Ocean |
institution |
Open Polar |
collection |
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 I. Stendardo N. Gruber A. Körtzinger CARINA oxygen data in the Atlantic Ocean |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 ... |
format |
Article in Journal/Newspaper |
author |
I. Stendardo N. Gruber A. Körtzinger |
author_facet |
I. Stendardo N. Gruber A. Körtzinger |
author_sort |
I. Stendardo |
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 Publications |
publishDate |
2009 |
url |
https://doaj.org/article/1b9a5709fdfd4cedb0b4d677dc7de39e |
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, Vol 1, Iss 1, Pp 87-100 (2009) |
op_relation |
http://www.earth-syst-sci-data.net/1/87/2009/essd-1-87-2009.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 1866-3508 1866-3516 https://doaj.org/article/1b9a5709fdfd4cedb0b4d677dc7de39e |
_version_ |
1766348415595184128 |