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Dissolved inorganic carbon (DIC), total alkalinity, temperature, salinity and other variables collected from discrete samples and profile observations during the R/V Celtic Explorer cruise CE17007 along the Global Ocean Ship-Based Hydrographic Investigation Program (GO-SHIP) Section A02 (EXPOCODE 45CE20170427) in the North Atlantic Ocean from 2017-04-27 to 2017-05-22 (NCEI Accession 0208599)


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            title:  Dissolved inorganic carbon (DIC), total alkalinity, temperature, salinity and other variables collected from discrete samples and profile observations during the R/V Celtic Explorer cruise CE17007 along the Global Ocean Ship-Based Hydrographic Investigation Program (GO-SHIP) Section A02 (EXPOCODE 45CE20170427) in the North Atlantic Ocean from 2017-04-27 to 2017-05-22 (NCEI Accession 0208599)
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                date:  2020-01-31
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                individualName:  Peter L. Croot
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        abstract:  This dataset includes discrete profile measurements of dissolved inorganic carbon, total alkalinity, temperature, salinity, oxygen, nutrients, chlorofluorocarbon 12 (CFC-12) and sulfur hexafluoride (SF6) made during the R/V Celtic Explorer cruise CE17007 along the Global Ocean Ship-Based Hydrographic Investigation Program (GO-SHIP) Section A02 (EXPOCODE 45CE20170427) in the North Atlantic Ocean from 2017-04-27 to 2017-05-22. Hydrographic measurements along this section were made under the direction of the GO-SHIP. This reoccupation of the A02 section was supported by the Irish Marine Institute and funded under the Marine Research Programme by the Irish Government. Individual teams were supported by the European Union’s Horizon 2020 and the Canada Excellence Research Chair in Ocean Science and Technology.
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
        credit:  Funding Information: Marine Research Programme by the Irish Government (Global Ocean Ship-Based Hydrographic Investigation Program (GO-SHIP).)
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            keyword:  R/V Celtic Explorer
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            keyword:  ALKALI
            keyword:  CFC-12
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            keyword:  NITRAT
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            keyword:  TCARBN
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/7aecabfb-0047-484f-8396-efc0da16bc20 CO2 ANALYZERS > CO2 ANALYZERS
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/01cc0beb-7c9a-40ed-ad86-0661b41aee53 CTD > Conductivity, Temperature, Depth
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/b79c7e06-cd07-442f-bf12-2019cd71c201 NISKIN BOTTLES
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/1bb21d0f-bf48-42b5-8e09-cc0d58407e4a Ships
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              Anchor:  https://vocab.ices.dk/services/pox/GetCodeDetail/SHIPC/45CE Celtic Explorer (call sign: EIGB, ICES code: 45CE, 2003)
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/a4202721-0cba-4fa1-853f-890f146b04f9 OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN
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            keyword:  North Atlantic Ocean
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            otherConstraints:  Cite as: Croot, Peter L.; Schuster, Ute; Tanhua, Toste; Szumski, Tom; McGovern, Evin (2020). Dissolved inorganic carbon (DIC), total alkalinity, temperature, salinity and other variables collected from discrete samples and profile observations during the R/V Celtic Explorer cruise CE17007 along the Global Ocean Ship-Based Hydrographic Investigation Program (GO-SHIP) Section A02 (EXPOCODE 45CE20170427) in the North Atlantic Ocean from 2017-04-27 to 2017-05-22 (NCEI Accession 0208599). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/4379-p950. Accessed [date].
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                    date:  2022
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                    beginPosition:  2017-04-27
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                description:  NCEI Accession 0208599 v1.1 was published.
                dateTime:
                  DateTime:  2020-01-31T20:42:15Z
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                        title:  NCEI Accession 0208599 v1.1
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                                    name:  NCEI Accession 0208599 v1.1
                                    description:  published 2020-01-31T20:42:15Z
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                description:  Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: TCARBN; Unit: UMOL/KG; Observation type: discrete; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Detailed sampling and analyzing information: All measurements were completed on two Versatile INstrument for the Determination of Titration Alkalinity (VINDTA, version 3C, SN#064 and #065, Marianda, Germany, Mintrop, 2004) each connected to a coulometer (SN135015020 and SN135015019 respectively). Water samples were first analysed for Dissolved Inorganic Carbon (DIC). An excess of phosphoric acid (1M, 8.5%) was added to a calibrated volume of seawater sample to convert all inorganic dissolved carbon to CO2. This CO2 was then transported to the coulometer cell by oxygen-free-nitrogen gas (OfN), which was filtered through soda lime to remove any residual traces of CO2 prior to coming in contact with the recently converted CO2. In the cell, all CO2 is quantitatively absorbed to form an acid that is subsequently titrated via coulometry. See Dickson et al., (2007) SOP #02 for more detailed information.; Standardization description: Initial DIC calibration was done during the cruise for each instrument by correcting all sample data by the difference between the mean of all CRMs. Post-cruise data quality control will include the calibration of the DIC readings for each coulometer cell used during CE17007, identification and removal of errors/outliers and accounting for instrument drift.; CRM manufacturer: Prof A Dickson, Scripps Institute of Oceanography, San Diego, USA; CRM batch number: CRM batch 163 (certified at 2039.49 ± 0.73 for DIC); Method reference: Dickson, A. G., Sabine, C. L., and Christian, J. R. (Eds.) (2007), Guide to best practices for ocean CO2 measurements, PICES Special Publication 3, pp.191; Researcher name: Ute Schuster; Researcher institution: University of Exeter.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Total alkalinity; Abbreviation: ALKALI; Unit: UMOL/KG; Observation type: discrete; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Type of titration: Total Alkalinity was measured by potentiometric titration using the same VINDTA machines as for DIC analysis. These systems use a highly precise Metrohm Titrino for acid addition, an ORION-Ross pH electrode, a Metrohm reference electrode and an auxiliary electrode. Similarly to the DIC analysis, the pipette and analysis cell were kept at the same temperature as the samples (25oC) by a water jacket. Hydrochloric acid (0.1M) made to the ionic strength of seawater was used as the alkalinity titrant as described in SOP#3B (Dickson et al., 2007). Alkalinity values were calibrated using replicate analyses taken from the 500mL bottles and CRM batch 163 (certified at 2215.53 kg-1 ± 0.56 for TA). See Dickson et al., (2007) SOP #03 for more detailed information. Post-cruise data corrections will include a recalculation of alkalinities using CTD temperature, salinity and nutrients, and also incorporate a recalibration of the alkalinity pipettes’ volume and temperature sensors. Post-cruise Quality Control will identify and remove outliers and account for drift in the instruments’ alkalinity measurements taken over the course of the cruise.; CRM manufacturer: Prof A Dickson, Scripps Institute of Oceanography, San Diego, USA; CRM batch number: CRM batch 163 (certified at 2215.53 kg-1 ± 0.56 for TA).; Uncertainty: Repeated measurements on the same batch of seawater (n=3) were undertaken every day prior to sample analysis in order to assess the precision of the method. The precision was estimated for the whole dataset to be 3 μmol kg-1 for DIC and 4 μmol kg-1 for TA. The accuracy of the measurement is assured by the standardization using the CRM from A.G. Dickson, Scripps Institution of Oceanography on daily basis.; Method reference: Dickson, A. G., C. L. Sabine, and J. R. Christian. 2007. Guide to best practices for ocean CO2 measurements. PICES Special Publication 3. 191 pp..
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CTDTMP; Abbreviation: CTDTMP; Unit: DEG_C; Controlled vocabulary name: WATER TEMPERATURE; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CTDSAL; Abbreviation: CTDSAL; Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CTDOXY; Abbreviation: CTDOXY; Unit: UMOL/KG; Controlled vocabulary name: DISSOLVED OXYGEN; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: SILCAT; Abbreviation: SILCAT; Unit: UMOL/KG; Controlled vocabulary name: silicate; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Nitrate; Abbreviation: NITRAT; Unit: UMOL/KG; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Nitrite; Abbreviation: NITRIT; Unit: UMOL/KG; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: PHSPHT; Abbreviation: PHSPHT; Unit: UMOL/KG; Controlled vocabulary name: phosphate; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Chlorofluorocarbon 12; Abbreviation: CFC-12; Unit: PMOL/KG; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sulfur Hexaflouride; Abbreviation: SF6; Unit: PMOL/KG; In-situ / Manipulation / Response variable: in-situ .
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                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:  CTD
            type:  CTD
            description:  Conductivity-Temperature-Depth probe
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  Niskin bottle
            type:  Niskin bottle
            description:  Device for obtaining samples of seawater at a specific depth Why special entry for Niskin bottle but no entry for Nansen bottle?
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  titrator
            type:  titrator
            description:  titrator
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  Celtic Explorer
            description:  Updated information from ICES for the vessel Celtic Explorer from IRELAND(IE). Code : 45CE Name : Celtic Explorer Country(s) : IRELAND(IE) (ISO Country Code) Platform Class : 31 Research vessel Call Sign : EIGB MMSI: 250487000 IMO : 9244439 Commissioned Date : 2003 Current Length : 65.5 Built : 2002 WOD Code: 9215 Notes : Marine Institute Galway research vessel Information Sources: - http://www.marine.ie/Home/site-area/infrastructure-facilities/research-vessels/celtic-explorer - http://www.lloydsmiu.com/lmiu/vessels/overview.htm?vesselID=322212 - http://www.marinetraffic.com/ais/details/ships/shipid:291593/mmsi:250487000/imo:9244439/vessel:CELTIC_EXPLORER
            instrument: (missing)