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Mapped Observation-Based Oceanic Dissolved Inorganic Carbon Monthly fields from 2004 through 2019 (MOBO-DIC2004-2019) (NCEI Accession 0277099)


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            title:  Mapped Observation-Based Oceanic Dissolved Inorganic Carbon Monthly fields from 2004 through 2019 (MOBO-DIC2004-2019) (NCEI Accession 0277099)
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                date:  2023-03-20
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                date:  2023-08-04
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                  Anchor:  DOI 10.25921/z31n-3m26
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5437 Lydia Keppler
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1052 Max Planck Institute for Meteorology - Hamburg (MPI)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/983 University of California - San Diego; Scripps Institution of Oceanography (SIO)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5437 Lydia Keppler
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5348 Siv K. Lauvset
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1052 Max Planck Institute for Meteorology - Hamburg (MPI)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/983 University of California - San Diego; Scripps Institution of Oceanography (SIO)
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        abstract:  This dataset contains Mapped Observation-Based Oceanic Dissolved Inorganic Carbon Monthly fields from 2004 through 2019. We increase the temporal resolution of the monthly climatology of MOBO-DIC (Keppler et al., 2020a) to resolve fields of DIC from January 2004 through December 2019. MOBO-DIC2004-2019 consists of time-varying, gap-filled mapped fields of DIC on 28 depth levels in the upper 1500 m on a 1°x1° grid, at monthly resolution. The original method for Keppler et al. (2020a) as well as an analysis of the seasonal dynamics of DIC at a global scale can be found in Keppler et al. (2020b). The MOBO-DIC mapping method is an extension and adaptation of the SOM-FFN approach by Landschützer et al. (2013), where the first step is to cluster the ocean into regions of similar physical and biogeochemical properties using self-organizing maps (SOM). In the second step, we run a feed-forward network (FFN) in each SOM-cluster to approximate and apply the statistical relationship between the target data (here: DIC), and better constrained predictor data that are available as mapped global fields. We adapted the SOM-FFN method in several ways compared to the original method by Landschützer et al. (2013), that mapped oceanic surface pCO2. As we map the DIC in the water column, we extend the mapping grid from three dimensions (latitude, longitude, and time), to four (latitude, longitude, time, and depth). As different predictors are available and/or meaningful when mapping DIC in the water column, we also have a different set of predictor data compared to the approach used by Landschützer et al. (2013). To overcome potential biases in the random selection of training and internal validation data, as well as boundary problems associated with the SOM clustering, we use a bootstrapping approach, running the SOM-FFN method 15 times. We use 3 different set-ups for the SOMs and run 5 slightly different FFNs in each of the SOM clusters. We take the mean across this ensemble as our final DIC fields. Due to data availability of the predictors, and different statistical relationships in the upper and deep ocean, we run the method separately for two depth slabs: from the surface to 500m, and from 500m to 1500 m. Thus, there may be small discontinuities at 500 m due to this boundary problem, but they are well within the uncertainties. We calculate the uncertainty based on three components: the prediction uncertainty (the standard deviation across the ensemble, global mean is approx. 7 μmol/kg), the uncertainty associated with the measurements (2.4 μmol/kg), and the uncertainty associated with the representation (16 μmol/kg). We use standard error propagation of these three components to obtain the overall uncertainty of MOBO-DIC2004-2019 (global mean is approximately 18 μmol kg−1). We want to emphasize that the uncertainties in our mapped estimate of DIC are considerably larger than the general uncertainties in direct observations of DIC. Thus, they must be considered in the interpretation of the data. Due to how the mapping method works, MOBO-DIC is most robust when using averages or integrals over large regions. For the full description of the method and its validation, please refer to both the Main Text and the Supporting Information of Keppler et al. (in review.).
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
        credit:  Funding Information: European Community (Horizon 2020 Project, Grant Agreement no. 821003 (4C))
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          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=1425989 Funding Information: NSF (Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Project, PLR-1425989)
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          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936222 Funding Information: NSF (Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Project, OPP-1936222)
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          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936222 Funding Information: NOAA
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          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936222 Funding Information: NASA
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/588 DISSOLVED INORGANIC CARBON (DIC)
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                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Schuster, U.
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:
                      Anchor:  https://orcid.org/0000-0002-3870-1721 Nakaoka, S.
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/32 National Institute for Environmental Studies
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Payne, M. R.
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Sasse, T. P.
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Zeng, J.
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Copernicus GmbH
                    role:  (CI_RoleCode) publisher
                presentationForm:  (CI_PresentationFormCode) documentDigital
                series:  (CI_Series)
                    name:  Biogeosciences
                    issueIdentification:  10(11)
                otherCitationDetails:  ISSN 1726-4189, pp. 7793-7815
            associationType:  (DS_AssociationTypeCode) crossReference
            initiativeType:  (DS_InitiativeTypeCode) project
        aggregationInfo:  (MD_AggregateInformation)
            aggregateDataSetName:  (CI_Citation)
                title:  NDP-110
                date:  (CI_Date)
                    date:  2022
                    dateType:  (CI_DateTypeCode) publication
                citedResponsibleParty:  (CI_ResponsibleParty)
                    positionName: (unknown)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/ndp_110/ndp110.html
                            protocol:  HTTPS
                            name: https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/ndp_110/ndp110.html
                            description:  related resource
                            function:  (CI_OnLineFunctionCode) information
                    role: (unknown)
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 US DOC; NOAA; NESDIS; National Centers for Environmental Information (NCEI)
                    role:  (CI_RoleCode) publisher
                presentationForm:  (CI_PresentationFormCode) documentDigital
            associationType:  (DS_AssociationTypeCode) crossReference
            initiativeType:  (DS_InitiativeTypeCode) project
        aggregationInfo:  (MD_AggregateInformation)
            aggregateDataSetName:  (CI_Citation)
                title:  Müller, Jens Daniel; Gruber, Nicolas; Carter, Brendan R.; Feely, Richard A.; Ishii, Masao; Lange, Nico; Lauvset, Siv K.; Murata, Akihiko; Olsen, Are; Pérez, Fiz F.; Sabine, Christopher L.; Tanhua, Toste; Wanninkhof, Rik; Zhu, Donghe (2023). Decadal Trends in the Oceanic Storage of Anthropogenic Carbon from 1994 to 2014 (NCEI Accession 0279447). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/ppcf-w020.
                date:  (CI_Date)
                    date:  2023-06-28
                    dateType:  (CI_DateTypeCode) publication
                identifier:  (MD_Identifier)
                    authority:  (CI_Citation)
                        title:  International DOI Foundation (IDF)
                        date: (inapplicable)
                    code: https://doi.org/10.25921/ppcf-w020
                identifier:  (MD_Identifier)
                    authority:  (CI_Citation)
                        title:  NOAA National Centers for Environmental Information
                        date: (inapplicable)
                    code:  gov.noaa.nodc:0279447
                citedResponsibleParty:  (CI_ResponsibleParty)
                    positionName: (unknown)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0279447.html
                            protocol:  HTTPS
                            name: https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0279447.html
                            description:  Related data
                            function:  (CI_OnLineFunctionCode) information
                    role: (unknown)
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Müller, Jens Daniel
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1888 ETH Zürich
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Gruber, Nicolas
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1888 ETH Zürich
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Carter, Brendan R.
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/2085 Joint Institute for the Study of the Atmosphere and Ocean
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Feely, Richard A.
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/976 NOAA Pacific Marine Environmental Laboratory
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Ishii, Masao
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1605 Japan Meteorological Agency; Meteorological Research Institute
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5224 Lange, Nico
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1606 GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR)
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            electronicMailAddress:  nlange@geomar.de
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://www.geomar.de/
                            protocol:  HTTP
                            name:  GEOMAR Helmholtz Centre for Ocean Research Kiel website
                            description:  Institution web page
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Lauvset, Siv K.
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Murata, Akihiko
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Olsen, Are
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/660 University of Bergen
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Pérez, Fiz F.
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1604 Instituto de Investigaciones Marinas
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Sabine, Christopher L.
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1572 The University of Hawai'i System
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Tanhua, Toste
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1606 GEOMAR Helmholtz Centre for Ocean Research Kiel
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Wanninkhof, Rik
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Zhu, Donghe
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1888 ETH Zürich
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 US DOC; NOAA; NESDIS; National Centers for Environmental Information (NCEI)
                    role:  (CI_RoleCode) publisher
                presentationForm:  (CI_PresentationFormCode) tableDigital
            associationType:  (DS_AssociationTypeCode) crossReference
            initiativeType:  (DS_InitiativeTypeCode) project
        aggregationInfo:  (MD_AggregateInformation)
            aggregateDataSetName:  (CI_Citation)
                title:  NOAA National Centers for Environmental Information (2022). Ocean Carbon and Acidification Data System (OCADS). NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
                date:  (CI_Date)
                    date:  2022-04
                    dateType:  (CI_DateTypeCode) publication
                citedResponsibleParty:  (CI_ResponsibleParty)
                    positionName: (unknown)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
                            protocol:  HTTPS
                            name: https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
                            description:  OCADS website
                            function:  (CI_OnLineFunctionCode) information
                    role: (unknown)
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:
                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 US DOC; NOAA; NESDIS; National Centers for Environmental Information (NCEI)
                    role:  (CI_RoleCode) publisher
                presentationForm:  (CI_PresentationFormCode) documentDigital
                otherCitationDetails:  [accessed 2024-02-08]
            associationType:  (DS_AssociationTypeCode) crossReference
            initiativeType:  (DS_InitiativeTypeCode) program
        language:
          LanguageCode:  eng; USA
        characterSet:  (MD_CharacterSetCode) utf8
        topicCategory:  (MD_TopicCategoryCode) environment
        topicCategory:  (MD_TopicCategoryCode) oceans
        extent:  (EX_Extent)
            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  -179.5
                eastBoundLongitude:  179.5
                southBoundLatitude:  -89.5
                northBoundLatitude:  89.5
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  2004-01-01
                    endPosition:  2019-12-01
        supplementalInformation:  In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
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    distributionInfo:  (MD_Distribution)
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:
                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  +1-301-713-3277
                    address:  (CI_Address)
                        electronicMailAddress:  NCEI.Info@noaa.gov
                role:  (CI_RoleCode) pointOfContact
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
                orderingInstructions:  Contact NCEI for other distribution options and instructions.
            distributorFormat:  (MD_Format)
                name:  Originator data format
                version: (unknown)
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                transferSize:
                  Real:  2022.628
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0277099.html
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  Project Metadata
                    description:  Navigate directly to the URL for a descriptive web page with download links.
                    function:  (CI_OnLineFunctionCode) information
                onLine:  (CI_OnlineResource)
                    linkage: https://doi.org/10.25921/z31n-3m26
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  NCEI Dataset Landing Page
                    description:  Navigate directly to the URL for a descriptive web page with download links.
                    function:  (CI_OnLineFunctionCode) information
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/archive/accession/oas/277099
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  Descriptive Information
                    description:  Navigate directly to the URL for a descriptive web page with download links.
                    function:  (CI_OnLineFunctionCode) information
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/archive/accession/download/277099
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  HTTPS
                    description:  Navigate directly to the URL for data access and direct download.
                    function:  (CI_OnLineFunctionCode) download
                onLine:  (CI_OnlineResource)
                    linkage: ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0211/0277099/
                    protocol:  FTP
                    applicationProfile:  Any FTP client
                    name:  FTP
                    description:  These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
                    function:  (CI_OnLineFunctionCode) download
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  NCEI Accession 0277099 v1.1 was published.
                dateTime:
                  DateTime:  2023-03-20T21:57:58Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0277099 v1.1
                        date:  (CI_Date)
                            date: (inapplicable)
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0277099/1.1
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0277099 v1.1
                                    description:  published 2023-03-20T21:57:58Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
            processStep:  (LE_ProcessStep)
                description:  NCEI Accession 0277099 was revised and v1.2 was published.
                rationale:  Additional metadata files were received or created for this dataset. These updates were copied into the about/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
                dateTime:
                  DateTime:  2023-03-21T21:20:53Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0277099 v1.2
                        date:  (CI_Date)
                            date: (inapplicable)
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0277099/1.2
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0277099 v1.2
                                    description:  published 2023-03-21T21:20:53Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
            processStep:  (LE_ProcessStep)
                description:  NCEI Accession 0277099 was revised and v2.3 was published.
                rationale:  Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
                dateTime:
                  DateTime:  2023-08-04T19:28:52Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0277099 v2.3
                        date:  (CI_Date)
                            date: (inapplicable)
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0277099/2.3
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0277099 v2.3
                                    description:  published 2023-08-04T19:28:52Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Dissolved inorganic carbon (DIC in µmol kg-1, on the grid: lon, lat, depth, month); Abbreviation: DIC; Unit: µmol kg-1.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: DIC uncertainty (DIC_err in µmol kg-1, on the grid: lon, lat, depth, month; Abbreviation: DIC_err; Unit: µmol kg-1.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Longitude (lon; 179.5°W to 179.5°E, at 1° resolution); Abbreviation: lon; Unit: degrees_east.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Latitude (lat; 89.5°N to 89.5°S, at 1° resolution); Abbreviation: lat; Unit: degrees_north.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Depth (depth; from 2.5 m to 1975 m, on 33 depth levels); Abbreviation: depth; Unit: meters.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Julian Day (from January 2004 to January 2020 at monthly resolution); Abbreviation: juld .
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) asNeeded
        maintenanceNote:  Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
        maintenanceNote:  NCEI Accession 0277099 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made.
        contact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            role:  (CI_RoleCode) custodian
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  carbon dioxide (CO2) gas analyzer
            type:  carbon dioxide (CO2) gas analyzer
            description:  measures gaseous carbon dioxide Carbon dioxide gas analyzer has often been referred to as LI-COR, because a lot of researchers choose to use products manufactured by LI-COR incorporation for their carbon dioxide measurement. The main component of a carbon dioxide analyzer is a nondispersive infrared (NDIR) spectroscopic sensors to detect CO2 in a gaseous environment by its characteristic absorption. Carbon dioxide (CO2) gas analyzer works together with carbon dioxide (CO2) equilibrator (insttypes_id 184) to measure carbon dioxide in the water. To measure water carbon dioxide, water needs to be continuously supplied to a showerhead inside an equilibrator. As the water flows through the equilibrator chamber, dissolved carbon dioxide exchanges quickly with air in the headspace. This air is then sampled by the carbon dioxide analyzer to determine the mole fraction of CO2 in water.
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  VARIOUS CHARTERED VESSELS
            description:  VARIOUS CHARTERED VESSELS
            instrument: (missing)