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Surface underway measurements of partial pressure of carbon dioxide (pCO2) in water and atmosphere, sea surface temperature, sea surface salinity and barometric pressure obtained during R/V Celtic Explorer research cruises in the North Atlantic Ocean in 2022 (NCEI Accession 0277789)

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This dataset includes surface underway, chemical, meteorological and physical data collected during R/V Celtic Explorer research cruises in the North Atlantic Ocean from 2022-04-24 to 2022-07-24. The measurements are done with a pCO2 instrument from General Oceanics (Miami/USA) and is described in detail in Pierrot et al.(2009). Surface water is pumped continuously from the intake to the equilibrator. The equilibrator contains a water spray head, and as the water flows through it the dissolved CO2 equilibrates with the headspace. The headspace is dried and xCO2 is determined and as the water flows through it the dissolved CO2 equilibrates with the headspace. The headspace is dried and xCO2 is determined by an infrared sensor. Calculations were performed following Pierrot (2009) and are described in detail in Steinhoff (2010).

Dataset Citation

Cite as: Cronin, Margot; Steinhoff, Tobias (2023). Surface underway measurements of partial pressure of carbon dioxide (pCO2) in water and atmosphere, sea surface temperature, sea surface salinity and barometric pressure obtained during R/V Celtic Explorer research cruises in the North Atlantic Ocean in 2022 (NCEI Accession 0277789). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/q589-d685. Accessed [date].

Dataset Identifiers

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gov.noaa.nodc:0277789

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Distribution Formats	Originator data format
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2022-04-24 to 2022-07-24
Spatial Bounding Box Coordinates	West: -52.777 East: -4.8 South: 47.1 North: 59.507
Spatial Coverage Map

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Associated Resources

Pierrot, D., Neill, C., Sullivan, K., Castle, R., Wanninkhof, R., Lüger, H., Johannessen, T., Olsen, A., Feely, R. A., & Cosca, C. E. (2009). Recommendations for autonomous underway pCO2 measuring systems and data-reduction routines. Deep Sea Research Part II: Topical Studies in Oceanography, 56(8-10), 512-522. https://doi.org/10.1016/j.dsr2.2008.12.005
- https://doi.org/10.1016/j.dsr2.2008.12.005
  related journal article
Steinhoff, T. (2010). Carbon and nutrient fluxes in the North Atlantic Ocean. Dissertation. http://eldiss.uni-kiel.de/macau/receive/dissertation_diss_00005704
- http://eldiss.uni-kiel.de/macau/receive/dissertation_diss_00005704
  related publication or dataset
M/V Atlantic Companion, R/V Celtic Explorer Ships and M/V Atlantic Cartier Lines
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/VOS_Program/a_companion.html
  related resource
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
- https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
  OCADS website

Publication Dates	publication: 2023-04-27
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed
Purpose	This dataset is available to the public for a wide variety of uses including scientific research and analysis.
Use Limitations	accessLevel: Public 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.

Dataset Citation	Cite as: Cronin, Margot; Steinhoff, Tobias (2023). Surface underway measurements of partial pressure of carbon dioxide (pCO2) in water and atmosphere, sea surface temperature, sea surface salinity and barometric pressure obtained during R/V Celtic Explorer research cruises in the North Atlantic Ocean in 2022 (NCEI Accession 0277789). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/q589-d685. Accessed [date].
Cited Authors	Cronin, Margot Marine Institute of Ireland (MI) Steinhoff, Tobias GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR)
Principal Investigators	Margot Cronin Marine Institute of Ireland (MI) Tobias Steinhoff GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR)
Contributors	Marine Institute of Ireland (MI) GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR)
Resource Providers	Kevin M. O'Brien US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL) US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Funding Information: Irish Marine Institute (Marine Research Programme by the Irish Government)

Theme keywords	NODC DATA TYPES THESAURUS BAROMETRIC PRESSURE Partial pressure (or fugacity) of carbon dioxide - atmosphere partial pressure of carbon dioxide - water SALINITY - SURFACE WATER WATER TEMPERATURE xCO2 atmosphere xCO2 seawater NODC OBSERVATION TYPES THESAURUS chemical meteorological physical surface underway WMO_CategoryCode oceanography Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE > PARTIAL PRESSURE OF CARBON DIOXIDE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > SURFACE SALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY OCADS Study Type Surface underway Provider Keywords R/V Celtic Explorer SOOP VOS Provider Variable Abbreviations Atm xCO2 (dry, running mean) [ppm] Atm. Pressure [mbar] Atm. xCO2 (dry) [ppm] Day of year Equi Press [mbar] Equi Temp [deg C] Hour\|Minute\|Second Latitude [deg N] Longitude [deg E] SSS SST [deg C] Year\|Month\|Day fCO2 (SST, 100hum) [uatm] pCO2 (SST, 100hum.) [µatm] xCO2 (equi temp, dry) [ppm]
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS GEOMAR Helmholtz Centre for Ocean Research Kiel Marine Institute of Ireland NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory Global Change Master Directory (GCMD) Data Center Keywords DE/GEOMAR > GEOMAR - Helmholtz Centre for Ocean Research Kiel, Germany DOC/NOAA/OAR/PMEL > Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce IE/MARINE > Marine Institute, Ireland
Platform keywords	NODC PLATFORM NAMES THESAURUS Celtic Explorer Global Change Master Directory (GCMD) Platform Keywords Ships ICES/SeaDataNet Ship Codes Celtic Explorer (call sign: EIGB, ICES code: 45CE, 2003)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS barometric pressure sensor carbon dioxide (CO2) gas analyzer salinometer showerhead equilibrator temperature sensor Global Change Master Directory (GCMD) Instrument Keywords BAROMETERS > BAROMETERS CO2 ANALYZERS > CO2 ANALYZERS EQUILIBRATORS SALINOMETERS TEMPERATURE SENSORS > TEMPERATURE SENSORS
Place keywords	NODC SEA AREA NAMES THESAURUS North Atlantic Ocean Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN Provider Geographic Names North Atlantic Ocean
Project keywords	NODC PROJECT NAMES THESAURUS Ship of Opportunity Programme (SOOP) Surface Ocean CO2 Atlas (SOCAT) Cruise ID CE22008 CE22009 CE22010 EXPOCODE 45CE20220424 45CE20220510 45CE20220614 Ocean Acidification Search Keywords Ocean Carbon and Acidification Data System (OCADS) Project Reference Section ID SOOP
Keywords	NCEI ACCESSION NUMBER 0277789

Use Constraints	Cite as: Cronin, Margot; Steinhoff, Tobias (2023). Surface underway measurements of partial pressure of carbon dioxide (pCO2) in water and atmosphere, sea surface temperature, sea surface salinity and barometric pressure obtained during R/V Celtic Explorer research cruises in the North Atlantic Ocean in 2022 (NCEI Accession 0277789). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/q589-d685. Accessed [date].
Access Constraints	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.
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.

Lineage information for: dataset
Processing Steps	2023-04-27T20:18:31Z - NCEI Accession 0277789 v1.1 was published.
Output Datasets	NCEI Accession 0277789 v1.1 NCEI Accession 0277789 v1.1 (download) published 2023-04-27T20:18:31Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: pCO2 (fCO2) autonomous; Abbreviation: pCO2 (SST, 100hum.) [µatm]; Unit: µatm; Observation type: surface underway; Sampling instrument: water collection with pump; Location of seawater intake: bow; Analyzing instrument: General Oceanics GO pCO2 system; Detailed sampling and analyzing information: SOP05, Dickson, A.G., Sabine, C. L. and Christian, J.R. (2007). Guide to best Practices for Ocean CO2 measurements; Pierrot, D. et al. (2009), Recommendations for autonomous underway pCO2 measuring systems and data-reduction routines; Equilibrator type: spray head; Is the equilibrator vented or not: Vented; Water flow rate: 2.5 L/min; Gas flow rate: 0.08 - 0.18 L/min; How was temperature inside the equilibrator measured: Equilibrator temperature is measured by a Fluke Hart 1523, wich is known to be stable over a longer period. It was calibrated in Nov. 2019.; How was pressure inside the equilibrator measured: The equilibrator is open to the atmosphere. Since no absolute pressure sensor was installed the pressure from the atmospheric pressure sensor was used. A SETRA difference pressure sensor is attached to the equilibrator.; Drying method for gas: Peltier and Nafion dryer; SEA CO2 gas detector manufacturer: LI-COR (non-dispersive IR detector); SEA CO2 gas detector model: 7000; SEA CO2 gas detector uncertainty: The standard operating procedure results in an uncertainity of less than 3 uatm.; Standardization technique: At the beginning of each sample, the instrument self-calibrates using a zero and high standard. The zero standard is generated by cycling a small amount of air through a soda lime chamber. The high standard is from a cylinder of calibrated standard reference gas, 495.95 umol/mol, from ESRL.; Standard gas manufacturer: From the Saildrone portal - Number:JJ13592 - 499.26 (from: https://gml.noaa.gov/ccl/refgas.html); Standard gas uncertainty: 0.01; Water vapor correction method: The dried sampe was corrected to 100% humidity which was calculated following Weiss and Price (1980). Nitrous Oxide solubility in water and seawater.; Temperature correction method: The temperature correction between equilibrator temperature and intake temperature was done following Takahashi et al. (1993). Seasonal variation of CO2 and nutrients in the high-latitude Surface Oceans: A comparative study.; At what temperature was pCO2 reported: intake temperature of seawater; Method reference: SOP05, Dickson, A.G., Sabine, C. L. and Christian, J.R. (2007). Guide to best Practices for Ocean CO2 measurements; Pierrot, D. et al. (2009), Recommendations for autonomous underway pCO2 measuring systems and data-reduction routines. Calculated per Sutton, A.J., Sabine, C.L., Maenner-Jones, S., Lawrence-Slavas, N., Meinig, C., Feely, R.A., Mathis, J.T., Musielewicz, S., Bott, R., McLain, P.D., Fought, J., Kozyr, A., 2014. A high-frequency atmospheric and seawater pCO2 data set from 14 open ocean sites using a moored autonomous system. Earth Sys. Sci. Data, 6, doi: 10.5194/essd-6-353-2014, 353-366. Sabine, C., Sutton, A., Mccabe, K., Lawrence-Slavas, N., Alin, S., Feely, R., Jenkins, R., Maenner, S., Meinig, C., Thomas, J., Van Ooijen, E., Passmore, A. and Tilbrook, B.: Evaluation of a New Carbon Dioxide System for Autonomous Surface Vehicles, J. Atmos. Ocean. Technol., 37, 1305–1317, doi:10.1175/JTECH-D-20-0010.1, 2020.; QC steps: Yes. Parameter or Variable: Year\|Month\|Day; Abbreviation: Year\|Month\|Day; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Hour\|Minute\|Second; Abbreviation: Hour\|Minute\|Second; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Day of year; Abbreviation: Day of year; Unit: decimal year day; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Longitude [deg E]; Abbreviation: Longitude [deg E]; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Latitude [deg N]; Abbreviation: Latitude [deg N]; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: fCO2 (SST, 100hum) [uatm]; Abbreviation: fCO2 (SST, 100hum) [uatm]; Unit: fugacity of CO2 in seawater at SST and 100% humidity in µatm; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: SST [deg C]; Abbreviation: SST [deg C]; Unit: Sea surface temperature in deg C; Controlled vocabulary name: SEA SURFACE TEMPERATURE; In-situ / Manipulation / Response variable: in-situ; Sampling instrument: water collection with pump; Analyzing instrument: Seabird sensors; Method reference: Seabird SBE21 and SBE38 manual. Parameter or Variable: SSS; Abbreviation: SSS; Unit: Sea Surface Salinity; Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ; Sampling instrument: water collection with pump; Analyzing instrument: Seabird sensors; Uncertainty: 0.1; Method reference: Seabird SBE21 and SBE38 manual. Parameter or Variable: Atm. Pressure [mbar]; Abbreviation: Atm. Pressure [mbar]; Unit: mbar; Controlled vocabulary name: BAROMETRIC PRESSURE; Observation type: Underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Druck barometer; Uncertainty: 0.5 mbar. Parameter or Variable: Equi Temp [deg C]; Abbreviation: Equi Temp [deg C]; Unit: Deg C; Observation type: Underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Fluke Hart 1523; Uncertainty: <0.05 Deg.C. Parameter or Variable: Pressure inside the equilibrator; Abbreviation: Equi Press [mbar]; Unit: mBar; Observation type: Underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: SETRA (Model 239); Detailed sampling and analyzing information: The equilibrator is open to the atmosphere. Since no absolute pressure sensor was installed the pressure from the atmospheric pressure sensor was used. A SETRA difference pressure sensor is attached to the equilibrator and the equilibrator pressure is the sum of the two pressures.; Uncertainty: <1. Parameter or Variable: Dry mole fraction of CO2 in the equilibrator headspace at equilibrator temperature in ppm; Abbreviation: xCO2 (equi temp, dry) [ppm]; Unit: ppm; Observation type: Surface underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Licor LI7000; Uncertainty: <0.5 ppm. Parameter or Variable: dry mole fraction of CO2 of atmospheric air in ppm; Abbreviation: Atm. xCO2 (dry) [ppm]; Unit: ppm; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; Observation type: Underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Licor LI7000; Uncertainty: <1. Parameter or Variable: dry mole fraction of CO2 of atmospheric air in ppm with a running mean (500 minutes) to interpolate between measurements.; Abbreviation: Atm xCO2 (dry, running mean) [ppm]; Unit: ppm; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Licor LI7000; Uncertainty: 1 .

Lineage information for: dataset

Processing Steps

Parameter or Variable: pCO2 (fCO2) autonomous; Abbreviation: pCO2 (SST, 100hum.) [µatm]; Unit: µatm; Observation type: surface underway; Sampling instrument: water collection with pump; Location of seawater intake: bow; Analyzing instrument: General Oceanics GO pCO2 system; Detailed sampling and analyzing information: SOP05, Dickson, A.G., Sabine, C. L. and Christian, J.R. (2007). Guide to best Practices for Ocean CO2 measurements; Pierrot, D. et al. (2009), Recommendations for autonomous underway pCO2 measuring systems and data-reduction routines; Equilibrator type: spray head; Is the equilibrator vented or not: Vented; Water flow rate: 2.5 L/min; Gas flow rate: 0.08 - 0.18 L/min; How was temperature inside the equilibrator measured: Equilibrator temperature is measured by a Fluke Hart 1523, wich is known to be stable over a longer period. It was calibrated in Nov. 2019.; How was pressure inside the equilibrator measured: The equilibrator is open to the atmosphere. Since no absolute pressure sensor was installed the pressure from the atmospheric pressure sensor was used. A SETRA difference pressure sensor is attached to the equilibrator.; Drying method for gas: Peltier and Nafion dryer; SEA CO2 gas detector manufacturer: LI-COR (non-dispersive IR detector); SEA CO2 gas detector model: 7000; SEA CO2 gas detector uncertainty: The standard operating procedure results in an uncertainity of less than 3 uatm.; Standardization technique: At the beginning of each sample, the instrument self-calibrates using a zero and high standard. The zero standard is generated by cycling a small amount of air through a soda lime chamber. The high standard is from a cylinder of calibrated standard reference gas, 495.95 umol/mol, from ESRL.; Standard gas manufacturer: From the Saildrone portal - Number:JJ13592 - 499.26 (from: https://gml.noaa.gov/ccl/refgas.html); Standard gas uncertainty: 0.01; Water vapor correction method: The dried sampe was corrected to 100% humidity which was calculated following Weiss and Price (1980). Nitrous Oxide solubility in water and seawater.; Temperature correction method: The temperature correction between equilibrator temperature and intake temperature was done following Takahashi et al. (1993). Seasonal variation of CO2 and nutrients in the high-latitude Surface Oceans: A comparative study.; At what temperature was pCO2 reported: intake temperature of seawater; Method reference: SOP05, Dickson, A.G., Sabine, C. L. and Christian, J.R. (2007). Guide to best Practices for Ocean CO2 measurements; Pierrot, D. et al. (2009), Recommendations for autonomous underway pCO2 measuring systems and data-reduction routines. Calculated per Sutton, A.J., Sabine, C.L., Maenner-Jones, S., Lawrence-Slavas, N., Meinig, C., Feely, R.A., Mathis, J.T., Musielewicz, S., Bott, R., McLain, P.D., Fought, J., Kozyr, A., 2014. A high-frequency atmospheric and seawater pCO2 data set from 14 open ocean sites using a moored autonomous system. Earth Sys. Sci. Data, 6, doi: 10.5194/essd-6-353-2014, 353-366. Sabine, C., Sutton, A., Mccabe, K., Lawrence-Slavas, N., Alin, S., Feely, R., Jenkins, R., Maenner, S., Meinig, C., Thomas, J., Van Ooijen, E., Passmore, A. and Tilbrook, B.: Evaluation of a New Carbon Dioxide System for Autonomous Surface Vehicles, J. Atmos. Ocean. Technol., 37, 1305–1317, doi:10.1175/JTECH-D-20-0010.1, 2020.; QC steps: Yes.
Parameter or Variable: Year|Month|Day; Abbreviation: Year|Month|Day; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Hour|Minute|Second; Abbreviation: Hour|Minute|Second; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Day of year; Abbreviation: Day of year; Unit: decimal year day; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Longitude [deg E]; Abbreviation: Longitude [deg E]; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Latitude [deg N]; Abbreviation: Latitude [deg N]; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: fCO2 (SST, 100hum) [uatm]; Abbreviation: fCO2 (SST, 100hum) [uatm]; Unit: fugacity of CO2 in seawater at SST and 100% humidity in µatm; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: SST [deg C]; Abbreviation: SST [deg C]; Unit: Sea surface temperature in deg C; Controlled vocabulary name: SEA SURFACE TEMPERATURE; In-situ / Manipulation / Response variable: in-situ; Sampling instrument: water collection with pump; Analyzing instrument: Seabird sensors; Method reference: Seabird SBE21 and SBE38 manual.
Parameter or Variable: SSS; Abbreviation: SSS; Unit: Sea Surface Salinity; Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ; Sampling instrument: water collection with pump; Analyzing instrument: Seabird sensors; Uncertainty: 0.1; Method reference: Seabird SBE21 and SBE38 manual.
Parameter or Variable: Atm. Pressure [mbar]; Abbreviation: Atm. Pressure [mbar]; Unit: mbar; Controlled vocabulary name: BAROMETRIC PRESSURE; Observation type: Underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Druck barometer; Uncertainty: 0.5 mbar.
Parameter or Variable: Equi Temp [deg C]; Abbreviation: Equi Temp [deg C]; Unit: Deg C; Observation type: Underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Fluke Hart 1523; Uncertainty: <0.05 Deg.C.
Parameter or Variable: Pressure inside the equilibrator; Abbreviation: Equi Press [mbar]; Unit: mBar; Observation type: Underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: SETRA (Model 239); Detailed sampling and analyzing information: The equilibrator is open to the atmosphere. Since no absolute pressure sensor was installed the pressure from the atmospheric pressure sensor was used. A SETRA difference pressure sensor is attached to the equilibrator and the equilibrator pressure is the sum of the two pressures.; Uncertainty: <1.
Parameter or Variable: Dry mole fraction of CO2 in the equilibrator headspace at equilibrator temperature in ppm; Abbreviation: xCO2 (equi temp, dry) [ppm]; Unit: ppm; Observation type: Surface underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Licor LI7000; Uncertainty: <0.5 ppm.
Parameter or Variable: dry mole fraction of CO2 of atmospheric air in ppm; Abbreviation: Atm. xCO2 (dry) [ppm]; Unit: ppm; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; Observation type: Underway; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Licor LI7000; Uncertainty: <1.
Parameter or Variable: dry mole fraction of CO2 of atmospheric air in ppm with a running mean (500 minutes) to interpolate between measurements.; Abbreviation: Atm xCO2 (dry, running mean) [ppm]; Unit: ppm; In-situ / Manipulation / Response variable: in-situ; Analyzing instrument: Licor LI7000; Uncertainty: 1 .

Acquisition Information (collection)
Instrument	barometric pressure sensor carbon dioxide (CO2) gas analyzer salinometer showerhead equilibrator temperature sensor
Platform	Celtic Explorer

Last Modified: 2024-06-10T13:27:44Z
For questions about the information on this page, please email: ncei.info@noaa.gov

Surface underway measurements of partial pressure of carbon dioxide (pCO2) in water and atmosphere, sea surface temperature, sea surface salinity and barometric pressure obtained during R/V Celtic Explorer research cruises in the North Atlantic Ocean in 2022 (NCEI Accession 0277789)

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