An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021

<p>The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface-to-bottom ocean biogeochemical bottle data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples....

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Autores principales:	S. K. Lauvset, N. Lange, T. Tanhua, H. C. Bittig, A. Olsen, A. Kozyr, M. Álvarez, S. Becker, P. J. Brown, B. R. Carter, L. Cotrim da Cunha, R. A. Feely, S. van Heuven, M. Hoppema, M. Ishii, E. Jeansson, S. Jutterström, S. D. Jones, M. K. Karlsen, C. Lo Monaco, P. Michaelis, A. Murata, F. F. Pérez, B. Pfeil, C. Schirnick, R. Steinfeldt, T. Suzuki, B. Tilbrook, A. Velo, R. Wanninkhof, R. J. Woosley, R. M. Key
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Environmental sciences GE1-350 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/5383bf3cf85a42d9acd1e6b0de928d59
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id	oai:doaj.org-article:5383bf3cf85a42d9acd1e6b0de928d59
record_format	dspace
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Geology QE1-996.5
spellingShingle	Environmental sciences GE1-350 Geology QE1-996.5 S. K. Lauvset N. Lange T. Tanhua H. C. Bittig A. Olsen A. Kozyr M. Álvarez S. Becker P. J. Brown B. R. Carter B. R. Carter L. Cotrim da Cunha R. A. Feely S. van Heuven M. Hoppema M. Ishii E. Jeansson S. Jutterström S. D. Jones M. K. Karlsen C. Lo Monaco P. Michaelis A. Murata F. F. Pérez B. Pfeil C. Schirnick R. Steinfeldt T. Suzuki B. Tilbrook A. Velo R. Wanninkhof R. J. Woosley R. M. Key An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021
description	<p>The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface-to-bottom ocean biogeochemical bottle data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples. GLODAPv2.2021 is an update of the previous version, GLODAPv2.2020 (Olsen et al., 2020). The major changes are as follows: data from 43 new cruises were added, data coverage was extended until 2020, all data with missing temperatures were removed, and a digital object identifier (DOI) was included for each cruise in the product files. In addition, a number of minor corrections to GLODAPv2.2020 data were performed. GLODAPv2.2021 includes measurements from more than 1.3 million water samples from the global oceans collected on 989 cruises. The data for the 12 GLODAP core variables (salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, CFC-11, CFC-12, CFC-113, and <span class="inline-formula">CCl<sub>4</sub></span>) have undergone extensive quality control with a focus on systematic evaluation of bias. The data are available in two formats: (i) as submitted by the data originator but updated to World Ocean Circulation Experiment (WOCE) exchange format and (ii) as a merged data product with adjustments applied to minimize bias. For this annual update, adjustments for the 43 new cruises were derived by comparing those data with the data from the 946 quality controlled cruises in the GLODAPv2.2020 data product using crossover analysis. Comparisons to estimates of nutrients and ocean <span class="inline-formula">CO<sub>2</sub></span> chemistry based on empirical algorithms provided additional context for adjustment decisions in this version. The adjustments are intended to remove potential biases from errors related to measurement, calibration, and data handling practices without removing known or likely time trends or variations in the variables evaluated. The compiled and adjusted data product is believed to be consistent with to better than 0.005 in salinity, 1 % in oxygen, 2 % in nitrate, 2 % in silicate, 2 % in phosphate, 4 <span class="inline-formula">µmol kg<sup>−1</sup></span> in dissolved inorganic carbon, 4 <span class="inline-formula">µmol kg<sup>−1</sup></span> in total alkalinity, 0.01–0.02 in pH (depending on region), and 5 % in the halogenated transient tracers. The other variables included in the compilation, such as isotopic tracers and discrete <span class="inline-formula">CO<sub>2</sub></span> fugacity (<span class="inline-formula"><i>f</i>CO<sub>2</sub></span>), were not subjected to bias comparison or adjustments.</p> <p>The original data, their documentation, and DOI codes are available at the Ocean Carbon Data System of NOAA NCEI (<span class="uri">https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/GLODAPv2_2021/</span>, last access: 7 July 2021). This site also provides access to the merged data product, which is provided as a single global file and as four regional ones – the Arctic, Atlantic, Indian, and Pacific oceans – under <a href="https://doi.org/10.25921/ttgq-n825">https://doi.org/10.25921/ttgq-n825</a> (Lauvset et al., 2021). These bias-adjusted product files also include significant ancillary and approximated data and can be accessed via <span class="uri">https://www.glodap.info</span> (last access: 29 June 2021). These were obtained by interpolation of, or calculation from, measured data. This living data update documents the GLODAPv2.2021 methods and provides a broad overview of the secondary quality control procedures and results.</p>
format	article
author	S. K. Lauvset N. Lange T. Tanhua H. C. Bittig A. Olsen A. Kozyr M. Álvarez S. Becker P. J. Brown B. R. Carter B. R. Carter L. Cotrim da Cunha R. A. Feely S. van Heuven M. Hoppema M. Ishii E. Jeansson S. Jutterström S. D. Jones M. K. Karlsen C. Lo Monaco P. Michaelis A. Murata F. F. Pérez B. Pfeil C. Schirnick R. Steinfeldt T. Suzuki B. Tilbrook A. Velo R. Wanninkhof R. J. Woosley R. M. Key
author_facet	S. K. Lauvset N. Lange T. Tanhua H. C. Bittig A. Olsen A. Kozyr M. Álvarez S. Becker P. J. Brown B. R. Carter B. R. Carter L. Cotrim da Cunha R. A. Feely S. van Heuven M. Hoppema M. Ishii E. Jeansson S. Jutterström S. D. Jones M. K. Karlsen C. Lo Monaco P. Michaelis A. Murata F. F. Pérez B. Pfeil C. Schirnick R. Steinfeldt T. Suzuki B. Tilbrook A. Velo R. Wanninkhof R. J. Woosley R. M. Key
author_sort	S. K. Lauvset
title	An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021
title_short	An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021
title_full	An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021
title_fullStr	An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021
title_full_unstemmed	An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021
title_sort	updated version of the global interior ocean biogeochemical data product, glodapv2.2021
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/5383bf3cf85a42d9acd1e6b0de928d59
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spelling	oai:doaj.org-article:5383bf3cf85a42d9acd1e6b0de928d592021-12-03T13:51:25ZAn updated version of the global interior ocean biogeochemical data product, GLODAPv2.202110.5194/essd-13-5565-20211866-35081866-3516https://doaj.org/article/5383bf3cf85a42d9acd1e6b0de928d592021-12-01T00:00:00Zhttps://essd.copernicus.org/articles/13/5565/2021/essd-13-5565-2021.pdfhttps://doaj.org/toc/1866-3508https://doaj.org/toc/1866-3516<p>The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface-to-bottom ocean biogeochemical bottle data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples. GLODAPv2.2021 is an update of the previous version, GLODAPv2.2020 (Olsen et al., 2020). The major changes are as follows: data from 43 new cruises were added, data coverage was extended until 2020, all data with missing temperatures were removed, and a digital object identifier (DOI) was included for each cruise in the product files. In addition, a number of minor corrections to GLODAPv2.2020 data were performed. GLODAPv2.2021 includes measurements from more than 1.3 million water samples from the global oceans collected on 989 cruises. The data for the 12 GLODAP core variables (salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, CFC-11, CFC-12, CFC-113, and <span class="inline-formula">CCl<sub>4</sub></span>) have undergone extensive quality control with a focus on systematic evaluation of bias. The data are available in two formats: (i) as submitted by the data originator but updated to World Ocean Circulation Experiment (WOCE) exchange format and (ii) as a merged data product with adjustments applied to minimize bias. For this annual update, adjustments for the 43 new cruises were derived by comparing those data with the data from the 946 quality controlled cruises in the GLODAPv2.2020 data product using crossover analysis. Comparisons to estimates of nutrients and ocean <span class="inline-formula">CO<sub>2</sub></span> chemistry based on empirical algorithms provided additional context for adjustment decisions in this version. The adjustments are intended to remove potential biases from errors related to measurement, calibration, and data handling practices without removing known or likely time trends or variations in the variables evaluated. The compiled and adjusted data product is believed to be consistent with to better than 0.005 in salinity, 1 % in oxygen, 2 % in nitrate, 2 % in silicate, 2 % in phosphate, 4 <span class="inline-formula">µmol kg<sup>−1</sup></span> in dissolved inorganic carbon, 4 <span class="inline-formula">µmol kg<sup>−1</sup></span> in total alkalinity, 0.01–0.02 in pH (depending on region), and 5 % in the halogenated transient tracers. The other variables included in the compilation, such as isotopic tracers and discrete <span class="inline-formula">CO<sub>2</sub></span> fugacity (<span class="inline-formula"><i>f</i>CO<sub>2</sub></span>), were not subjected to bias comparison or adjustments.</p> <p>The original data, their documentation, and DOI codes are available at the Ocean Carbon Data System of NOAA NCEI (<span class="uri">https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/GLODAPv2_2021/</span>, last access: 7 July 2021). This site also provides access to the merged data product, which is provided as a single global file and as four regional ones – the Arctic, Atlantic, Indian, and Pacific oceans – under <a href="https://doi.org/10.25921/ttgq-n825">https://doi.org/10.25921/ttgq-n825</a> (Lauvset et al., 2021). These bias-adjusted product files also include significant ancillary and approximated data and can be accessed via <span class="uri">https://www.glodap.info</span> (last access: 29 June 2021). These were obtained by interpolation of, or calculation from, measured data. This living data update documents the GLODAPv2.2021 methods and provides a broad overview of the secondary quality control procedures and results.</p>S. K. LauvsetN. LangeT. TanhuaH. C. BittigA. OlsenA. KozyrM. ÁlvarezS. BeckerP. J. BrownB. R. CarterB. R. CarterL. Cotrim da CunhaR. A. FeelyS. van HeuvenM. HoppemaM. IshiiE. JeanssonS. JutterströmS. D. JonesM. K. KarlsenC. Lo MonacoP. MichaelisA. MurataF. F. PérezB. PfeilC. SchirnickR. SteinfeldtT. SuzukiB. TilbrookA. VeloR. WanninkhofR. J. WoosleyR. M. KeyCopernicus PublicationsarticleEnvironmental sciencesGE1-350GeologyQE1-996.5ENEarth System Science Data, Vol 13, Pp 5565-5589 (2021)

An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021

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