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Surface underway measurements of partial pressure of carbon dioxide (pCO2) in the water and atmosphere, sea surface salinity, sea surface temperature and barometric pressure during R/V Xue Long CHINARE2018 Expedition (EXPOCODE 76XL20180723) in the Sea of Okhotsk, Japan Sea, North Pacific Ocean, Bering Sea, Chukchi Sea and Arctic Ocean from 2018-07-23 to 2018-09-04 (NCEI Accession 0223522)


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            title:  Surface underway measurements of partial pressure of carbon dioxide (pCO2) in the water and atmosphere, sea surface salinity, sea surface temperature and barometric pressure during R/V Xue Long CHINARE2018 Expedition (EXPOCODE 76XL20180723) in the Sea of Okhotsk, Japan Sea, North Pacific Ocean, Bering Sea, Chukchi Sea and Arctic Ocean from 2018-07-23 to 2018-09-04 (NCEI Accession 0223522)
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                date:  2020-12-24
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5453 Di Qi
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1639 State Oceanic Administration; Third Institute of Oceanography
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        abstract:  This dataset includes surface underway chemical, physical and meteorological measurements during R/V Xue Long CHINARE2018 Expedition (EXPOCODE 76XL20180723) in the Sea of Okhotsk, Japan Sea, North Pacific Ocean, Bering Sea, Chukchi Sea and Arctic Ocean from 2018-07-23 to 2018-09-04. These data include measurements of Mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature, in parts per million, mole fraction of CO2 measured in dry outside air, barometric pressure in the equilibrator headspace, barometric pressure, corrected to sea level, water temperature in equilibrator, sea surface temperature, sea surface salinity, fugacity of CO2 in sea water at SST and 100% humidity, and difference between sea water fCO2 and interpolated air fCO2. The instruments used to collect these data include carbon dioxide (CO2) gas analyzer and shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement.
        purpose:  The major objectives of this project is to provide a high quality carbon related and other measurements in the Arctic Ocean
        credit:  Funding Information: Ministry of Natural Resources, China
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/38 BAROMETRIC PRESSURE
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                            protocol:  HTTPS
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                            description:  Global Change Master Directory (GCMD). 2023. GCMD Keywords, Version 18. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords
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            keyword:  Arctic Ocean
            keyword:  Bering Sea
            keyword:  Chukchi Sea
            keyword:  Japan Sea
            keyword:  North Pacific Ocean
            keyword:  Sea of Okhotsk
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            otherConstraints:  Cite as: Qi, Di; Chen, Liqi; Gao, Zhongyong; Sun, Heng; Cai, Wei-Jun (2020). Surface underway measurements of partial pressure of carbon dioxide (pCO2) in the water and atmosphere, sea surface salinity, sea surface temperature and barometric pressure during R/V Xue Long CHINARE2018 Expedition (EXPOCODE 76XL20180723) in the Sea of Okhotsk, Japan Sea, North Pacific Ocean, Bering Sea, Chukchi Sea and Arctic Ocean from 2018-07-23 to 2018-09-04 (NCEI Accession 0223522). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/pds7-td05. Accessed [date].
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                title:  Di Qi, Liqi Chen, Zhongyong Gao, Heng Sun, Wei-Jun Cai. Ocean Surface Water Partial Pressure of CO2 database: Measurements Performed during the Ninth Chinese Arctic Research Expedition (CHINARE) (2018). Chinese National Arctic and Antarctic Data Center, 2020. https://doi.org/10.11856/NNS.D.2020.010.v0.
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                title:  R/V Xue Long Expeditions Underway Data
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                    date:  2022
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                            linkage: https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/VOS_Program/Xuelong.html
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                    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)
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                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
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                            linkage: https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
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        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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                description:  NCEI Accession 0223522 v1.1 was published.
                dateTime:
                  DateTime:  2020-12-24T11:41:05Z
                output:  (LE_Source)
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                        title:  NCEI Accession 0223522 v1.1
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                                    linkage: https://www.ncei.noaa.gov/archive/accession/0223522/1.1
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                description:  NCEI Accession 0223522 was revised and v2.2 was published.
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                dateTime:
                  DateTime:  2021-05-20T22:53:57Z
                output:  (LE_Source)
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                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0223522/2.2
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0223522 v2.2
                                    description:  published 2021-05-20T22:53:57Z
                                    function:  (CI_OnLineFunctionCode) download
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            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pCO2 (fCO2) autonomous; Abbreviation: fCO2_SW@SST; Unit: uatm; Observation type: Surface underway; Measured or calculated: Measured; Sampling instrument: Seawater pump; Location of seawater intake: Bow; Analyzing instrument: Non-dispersive infrared detector (Licor-7000); Detailed sampling and analyzing information: The mole fraction of CO2 in the headspace gas is measured using a non-dispersive infrared (NDIR) analyzer (LI-7000 from LICOR); Equilibrator type: Sprayhead above dynamic pool, no thermal jacket; Equilibrator volume: 0.95 (0.4 L water, 0.5 L headspace); Is the equilibrator vented or not: Vented; Water flow rate: 2.0 L/min; Gas flow rate: 0.1 L/min; How was temperature inside the equilibrator measured: Hart Scientific model 1523 digital thermometer; How was pressure inside the equilibrator measured: External Setra 270 connected to the exit of the analyzer; Drying method for gas: Gas stream passes through a thermoelectric condenser (~5 C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry).; SEA CO2 gas detector resolution: 0.01 uatm; SEA CO2 gas detector uncertainty: 1%; Standardization technique: The analyzer is calibrated every 4.3 hours with field standards that in turn were calibrated with primary standards that are directly traceable to the WMO scale. The zero gas is ultra-high purity air.; Standardization frequency: Every 4.3 hours; Standard gas manufacturer:; Standard gas concentration: CO2: 88.82 ppm, 188.36 ppm, 528.92 ppm; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Di Qi; Researcher institution: Third Institute of Oceanography.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea Surface Temperature; Abbreviation: SST_C; Unit: degrees celcius; Observation type: Surface Underway; Analyzing instrument: SBE 38, Seabird, Inc.; Detailed sampling and analyzing information: After sea water pump, ~3 m below sea surface; Uncertainty: Accuracy: 0.001C, Precision: 0.0003C; Researcher name: Wei-Jun Cai; Researcher institution: University of Georgia.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea Surface Salinity; Abbreviation: SAL_permil; Observation type: Surface Underway; Analyzing instrument: SBE 45, Seabird, Inc.; Uncertainty: Accuracy: +/- 0.005; Precision: 0.0002; Researcher name: Wei-Jun Cai; Researcher institution: University of Georgia.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Atmospheric Pressure; Abbreviation: PRES_ATM@SSP_hPa; Unit: hPa; Analyzing instrument: Vaisala, Model: PTB220; Uncertainty: Accuracy: +/- 0.15 hPa; Precision: 0.01 hPa; Researcher name: Wei-Jun Cai; Researcher institution: University of Georgia .
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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 0223522 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:  barometric pressure sensor
            type:  barometric pressure sensor
            description:  instrument used to measure the atmospheric pressure.
        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.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  salinometer
            type:  salinometer
            description:  generic salinometer use salinometer when the instrument type used is unclear but the data include salinity measurements
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  showerhead equilibrator
            type:  showerhead equilibrator
            description:  extracts dissolved CO2 from water A carbon dioxide equilibrator is usually in the shape of a vertical tube, with a showerhead on the top, some headspace, 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.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  temperature sensor
            type:  temperature sensor
            description:  A sensor used to measure temperature.
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  XUE LONG
            description:  R/V icebreaker, IMO 8877899, Owner: Polar Research Institute of China, Overall length (meters): 167.0(m) https://en.pric.org.cn/index.php?c=category&id=90 Additional equipment: Dolphin helicopter Overall length (meters): 11.44 Registration no.: B-7102 Call sign: 7102
            instrument: (missing)