Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from CEFAS ENDEAVOUR in the North Sea from 2012-09-10 to 2012-09-12 (NCEI Accession 0157400)


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            title:  Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from CEFAS ENDEAVOUR in the North Sea from 2012-09-10 to 2012-09-12 (NCEI Accession 0157400)
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                date:  2016-12-09
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                  Anchor:  DOI 10.3334/cdiac/otg.coast_cend1412
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                  Anchor:  NCEI Accession Number 0157400
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                  Anchor:  https://www.nodc.noaa.gov/cgi-bin/OAS/prd/person/details/2220 Alex Kozyr
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                  Anchor:  https://www.nodc.noaa.gov/cgi-bin/OAS/prd/institution/details/1730 US DOC; NOAA; NESDIS; National Centers for Environmental Information (NCEI)
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                  Anchor:  https://www.nodc.noaa.gov/cgi-bin/OAS/prd/person/details/5071 Naomi Greenwood
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        abstract:  NCEI Accession 0157400 includes Surface underway, chemical, meteorological and physical data collected from CEFAS ENDEAVOUR in the North Sea from 2012-09-10 to 2012-09-12. These data include AIR-SEA DIFFERENCE - PARTIAL PRESSURE (OR FUGACITY) OF CARBON DIOXIDE, BAROMETRIC PRESSURE, Partial pressure (or fugacity) of carbon dioxide - atmosphere, Partial pressure (or fugacity) of carbon dioxide - water, SALINITY and SEA SURFACE TEMPERATURE. The instruments used to collect these data include Carbon dioxide (CO2) gas analyzer and Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement. These data were collected by Dr. Naomi Greenwood and Dr. David J. Pearce of The Centre for Environment, Fisheries and Aquaculture Science as part of the Coastal_CEND_14_12 data set. CDIAC associated the following cruise ID(s) with this data set: 74E920120910
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
        credit:  Funding Information: NERC/Defra Ocean Acidification Research Programme, NE/H017186/1
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              Anchor:  https://accession.nodc.noaa.gov/0157400 0157400
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              Anchor:  https://www.nodc.noaa.gov/cgi-bin/OAS/prd/datatype/details/69 AIR-SEA DIFFERENCE - PARTIAL PRESSURE (OR FUGACITY) OF CARBON DIOXIDE
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              Anchor:  https://www.nodc.noaa.gov/cgi-bin/OAS/prd/datatype/details/38 BAROMETRIC PRESSURE
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            keyword:  EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE
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            keyword:  ΔpCO2
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            thesaurusName:  (CI_Citation)
                title:  Provider Variable Names
                date: (inapplicable)
        descriptiveKeywords:  (MD_Keywords)
            keyword:  CO2 ANALYZERS
            type:  (MD_KeywordTypeCode) instrument
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Instrument Keywords
                date:  (CI_Date)
                    date:  2018-03-15
                    dateType:  (CI_DateTypeCode) publication
                edition:  8.6
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            city:  Greenbelt
                            administrativeArea:  MD
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
                            protocol:  HTTPS
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:  SHIPS
            type:  (MD_KeywordTypeCode) platform
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Platform Keywords
                date:  (CI_Date)
                    date:  2018-03-15
                    dateType:  (CI_DateTypeCode) publication
                edition:  8.6
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            city:  Greenbelt
                            administrativeArea:  MD
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
                            protocol:  HTTPS
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:
              Anchor:  http://vocab.nerc.ac.uk/collection/C17/current/74E9/ 74E9
            type:  (MD_KeywordTypeCode) platform
            thesaurusName:  (CI_Citation)
                title:  SeaDataNet Ship and Platform Codes
                date: (inapplicable)
        descriptiveKeywords:  (MD_Keywords)
            keyword:  OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > NORTH SEA
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  Global Change Master Directory (GCMD) Location Keywords
                date:  (CI_Date)
                    date:  2018-03-15
                    dateType:  (CI_DateTypeCode) publication
                edition:  8.6
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA)
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            city:  Greenbelt
                            administrativeArea:  MD
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
                            protocol:  HTTPS
                            name:  Global Change Master Directory (GCMD) Keywords
                            description:  The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Atlantic Ocean
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  Provider Geographic Names
                date: (inapplicable)
        resourceConstraints:  (MD_Constraints)
            useLimitation:  accessLevel: Public
        resourceConstraints:  (MD_LegalConstraints)
            useConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Cite as: Greenwood, Naomi; Pearce, David J. (2016). Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from CEFAS ENDEAVOUR in the North Sea from 2012-09-10 to 2012-09-12 (NCEI Accession 0157400). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.coast_cend1412. Accessed [date].
        resourceConstraints:  (MD_LegalConstraints)
            useLimitation:  Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
        resourceConstraints:  (MD_LegalConstraints)
            accessConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
        aggregationInfo:  (MD_AggregateInformation)
            aggregateDataSetName:  (CI_Citation)
                title:  Sea Surface and Atmospheric fCO2 data measured in the European Coastal Atlantic Ocean onboard the R/V Cefas Endeavour during the CEND_14_12 cruise.
                date:  (CI_Date)
                    date:  2014
                    dateType:  (CI_DateTypeCode) publication
                identifier:  (MD_Identifier)
                    code:  Coastal_CEND_14_12
                citedResponsibleParty:  (CI_ResponsibleParty)
                    positionName: (unknown)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://cdiac.ornl.gov/ftp/oceans/CEND/CEND1412/
                            protocol:  HTTP
                            name:  Original dataset at CDIAC
                            description:  Coastal_CEND_14_12
                            function:  (CI_OnLineFunctionCode) download
                    role: (unknown)
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Greenwood, N., and D. Pearce
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:
                      Anchor:  https://www.nodc.noaa.gov/cgi-bin/OAS/prd/institution/details/179 Carbon Dioxide Information Analysis Center (CDIAC)
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            city:  OAK RIDGE
                            administrativeArea:  TN
                            country:  USA
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://cdiac.ornl.gov
                            protocol:  HTTP
                            name:  Carbon Dioxide Information Analysis Center (CDIAC) website
                            description:  Institution web page
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) publisher
                series:  (CI_Series)
                    name:  Ocean CO2
            associationType:  (DS_AssociationTypeCode) crossReference
        language:
          LanguageCode:  eng
        characterSet:  (MD_CharacterSetCode) utf8
        topicCategory:  (MD_TopicCategoryCode) environment
        topicCategory:  (MD_TopicCategoryCode) oceans
        topicCategory:  (MD_TopicCategoryCode) climatologyMeteorologyAtmosphere
        extent:  (EX_Extent)
            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  0.983818
                eastBoundLongitude:  2.219368
                southBoundLatitude:  51.523179
                northBoundLatitude:  53.531474
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  2012-09-10
                    endPosition:  2012-09-12
        supplementalInformation:  These data were acquired by NCEI from the Carbon Dioxide Information Analysis Center (CDIAC) in accordance with an archival submission agreement between CDIAC and NCEI. The data provider requests citing these data as described in the Cross Reference Citation at: https://accession.nodc.noaa.gov/0157400 NCEI cannot verify the accuracy or availability of the data provider's citation information, which is maintained by the Carbon Dioxide Information Analysis Center (CDIAC).
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    distributionInfo:  (MD_Distribution)
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:
                  Anchor:  https://www.nodc.noaa.gov/cgi-bin/OAS/prd/institution/details/1730 DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  301-713-3277
                        facsimile:  301-713-3300
                    address:  (CI_Address)
                        deliveryPoint:  Federal Building 151 Patton Avenue
                        city:  Asheville
                        administrativeArea:  NC
                        postalCode:  28801-5001
                        country:  USA
                        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:  CSV
                version: (unknown)
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                onLine:  (CI_OnlineResource)
                    linkage: https://www.nodc.noaa.gov/ocads/data/0157400.xml
                    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
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                onLine:  (CI_OnlineResource)
                    linkage: https://www.nodc.noaa.gov/ocads/
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  Ocean Carbon Data System (OCADS)
                    description:  Navigate directly to the URL for a descriptive web page.
                    function:  (CI_OnLineFunctionCode) information
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                onLine:  (CI_OnlineResource)
                    linkage: https://doi.org/10.3334/cdiac/otg.coast_cend1412
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  Dataset Description
                    description:  Navigate directly to the URL for a descriptive web page with download links.
                    function:  (CI_OnLineFunctionCode) information
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                onLine:  (CI_OnlineResource)
                    linkage: https://accession.nodc.noaa.gov/oas/157400
                    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
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                transferSize:
                  Real:  0.52
                onLine:  (CI_OnlineResource)
                    linkage: https://accession.nodc.noaa.gov/download/157400
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  HTTPS
                    description:  Navigate directly to the URL for data access and direct download.
                    function:  (CI_OnLineFunctionCode) download
            distributorTransferOptions:  (MD_DigitalTransferOptions)
                transferSize:
                  Real:  0.52
                onLine:  (CI_OnlineResource)
                    linkage: ftp://ftp.nodc.noaa.gov/nodc/archive/arc0101/0157400/
                    protocol:  FTP
                    applicationProfile:  Any FTP client
                    name:  FTP
                    description:  These data are available through the File Transfer Protocol (FTP). You may use any FTP client to download these data.
                    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 0157400 v1.1 was published.
                dateTime:
                  DateTime:  2016-12-09T17:23:35Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0157400 v1.1
                        date:  (CI_Date)
                            date: (inapplicable)
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://accession.nodc.noaa.gov/0157400/1.1
                                    protocol:  HTTP
                                    name:  NCEI Accession 0157400 v1.1
                                    description:  NCEI Accession 0157400 v1.1
                                    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: DOY; Abbreviation: DOY; Unit: Day of Year; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Date/Time; Abbreviation: Date/Time; Unit: Date and time of equilibrator measurement (marine air measurement is 4 minutes after); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Lat; Abbreviation: Lat; Unit: Latitude (degrees north); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Lon; Abbreviation: Lon; Unit: Longitude (degrees east); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: xCO2_equ; Abbreviation: xCO2_equ; Unit: CO2 Mixing Ratio in Equilibrator (dry; in ppmv); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: xCO2_atm; Abbreviation: xCO2_atm; Unit: mole fraction of CO2 of atmospheric air, at date_atm (ppm); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: xH2O_equ; Abbreviation: xH2O_equ; Unit: Mole fraction H2O in air from equilibrator (mmol/mol); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: P_atm; Abbreviation: P_atm; Unit: Atmospheric pressure measured by Li-Cor at time of marine air measurement (hPa); Controlled vocabulary name: BAROMETRIC PRESSURE; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: P_equilib; Abbreviation: P_equilib; Unit: Pressure of equilibration (hPa); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: T_equ; Abbreviation: T_equ; Unit: Equilibrator water temperature (deg C, average of the two eqilibrator PRTs used); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: T_sea; Abbreviation: T_sea; Unit: sea surface temperature (in degrees C); Controlled vocabulary name: SEA SURFACE TEMPERATURE; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: S_sea; Abbreviation: S_sea; Unit: Intake salinity (unitless); Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pCO2_sw; Abbreviation: pCO2_sw; Unit: partial pressure of CO2 in seawater at SST and 100% humidity, at date_sw (µatm); Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pCO2_atm; Abbreviation: pCO2_atm; Unit: Partial pressure CO2 in marine air (uatm); Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: fCO2_sw; Abbreviation: fCO2_sw; Unit: fco2 in air in equilibration with seawater at sea surface temperature and 100% humidity saturation, at date_sw (µatm); Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: fCO2_atm; Abbreviation: fCO2_atm; Unit: fugacity CO2 in marine air (uatm); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: ΔpCO2; Abbreviation: ΔpCO2; Unit: pCO2_sw - pCO2_atm (uatm); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: ΔfCO2; Abbreviation: ΔfCO2; Unit: fCO2_sw - fCO2_atm (uatm); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: WOCE QC flag; Abbreviation: WOCE QC flag; Unit: 2 = acceptable measurement, 3 = questionable measurement, 4 = bad measurement; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sub-flag; Abbreviation: Sub-flag; Unit: 1 = outside of standard range, 2 = questionable/interpolated T_sea, 3 = questionable T_equ, 4 = Anomalous T_equ - T_sea (±1.0°C), 5 = Questionable S_sea, 6 = questionable P_atm, 7 = low equilibrator gas flow, 8 = questionable air value, 10 = other, see QC comments; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: QC Comments; Abbreviation: QC Comments; Unit: Explanations of subflags; In-situ / Manipulation / Response variable: in-situ.
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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.
        contact:  (CI_ResponsibleParty)
            organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            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:  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.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement
            type:  Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement
            description:  A carbon dioxide equilibrator is usually in the shape of a vertical tube, with a shower head on the top, some head space, a lot of beads to increase the surface exchange area between water and air, a water seal device at the bottom to allow water to overflow, but prevents air exchange between inside and outside. Carbon dioxide (CO2) equilibrator works together with carbon dioxide (CO2) gas analyzer (insttypes_id 183) 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:  RV Cefas Endeavour
            description:  Updated information from ICES for the vessel CEFAS ENDEAVOUR from UNITED KINGDOM. Name : CEFAS ENDEAVOUR Flag : UNITED KINGDOM - GB (ISO Country Code) Call Sign : VQHF3 Title : RV IMO : 9251107 Commissioned Date : 2003 Current Length : 73.9 Built : 2002 Notes : Operated by the Centre for Environment, Fisheries and Aquaculture Science (Cefas) Additional Information Sources: - http://www.cefas.defra.gov.uk/about-us/facilities/research-vessel.aspx - http://en.wikipedia.org/wiki/RV_Cefas_Endeavour
            instrument: (missing)