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Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations from R/V F.G. Walton Smith coastal cruises in the Atlantic Ocean and Gulf of Mexico in 2005 (NCEI Accession 0241959)

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This dataset includes surface underway, chemical, meteorological and physical data collected from R/V F.G. Walton Smith in the Gulf of Mexico and North Atlantic Ocean in 2005. These data include air-sea difference of partial pressure of carbon dioxide (pCO2), pCO2 in atmosphere, pCO2 in water, barometric pressure, sea surface salinity and water temperature. The instruments used to collect these data include barometric pressure sensor, CCN-Gen2 system, LI-COR for autonomous carbon dioxide measurement and thermosalinographs. The Global Coastal Carbon Data Project data includes the bottle (discrete) and surface (underway) carbon-related measurements from coastal research cruises, the data from time series cruises and coastal moorings. The coastal regions data are very important for the understanding of carbon cycle on the continental margins.

Dataset Citation

Cite as: Pierrot, Denis; Wanninkhof, Rik; Sullivan, Kevin F. (2021). Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations from R/V F.G. Walton Smith coastal cruises in the Atlantic Ocean and Gulf of Mexico in 2005 (NCEI Accession 0241959). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/0qpy-7675. Accessed [date].

Dataset Identifiers

ISO 19115-2 Metadata

gov.noaa.nodc:0241959

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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	2005-10-04 to 2005-11-04
Spatial Bounding Box Coordinates	West: -82.766 East: -76.986 South: 24.395 North: 34.369
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
R/V Walton Smith Coastal Cruises
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Coastal/Walton_Smith.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: 2021-10-14
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: Pierrot, Denis; Wanninkhof, Rik; Sullivan, Kevin F. (2021). Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations from R/V F.G. Walton Smith coastal cruises in the Atlantic Ocean and Gulf of Mexico in 2005 (NCEI Accession 0241959). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/0qpy-7675. Accessed [date].
Cited Authors	Pierrot, Denis NOAA Atlantic Oceanographic and Meteorological Laboratory Wanninkhof, Rik Sullivan, Kevin F. NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Principal Investigators	Denis Pierrot US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory (AOML) Rik Wanninkhof US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory (AOML) Kevin F. Sullivan US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory (AOML)
Contributors	US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory (AOML)
Resource Providers	Kevin F. Sullivan US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory (AOML) US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory (AOML)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Funding Information: NOAA (NOAA Climate Program Office; NOAA Ocean Acidification Program)

Theme keywords	NODC DATA TYPES THESAURUS BAROMETRIC PRESSURE Delta pCO2 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 Coastal Cruises OA Cruises Provider Variable Abbreviations PRES_ATM@SSP_hPa PRES_EQU_hPa QC_SUBFLAG SAL_permil SST_C TEMP_EQU_C WOCE_QC_FLAG dfCO2_uatm fCO2_ATM_interpolated_uatm fCO2_SW@SST_uatm xCO2_ATM_interpolated_ppm xCO2_ATM_ppm xCO2_EQU_ppm
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/OAR/AOML > Atlantic Oceanographic and Meteorological Laboratory, OAR, NOAA, U.S. Department of Commerce
Platform keywords	NODC PLATFORM NAMES THESAURUS R/V F.G. Walton Smith ICES/SeaDataNet Ship Codes F. G. Walton Smith (call sign: WCZ6292, ICES code: 33WA, 1999)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS barometric pressure sensor carbon dioxide (CO2) gas analyzer temperature sensor thermosalinograph Global Change Master Directory (GCMD) Instrument Keywords BAROMETERS > BAROMETERS CO2 ANALYZERS > CO2 ANALYZERS TEMPERATURE SENSORS > TEMPERATURE SENSORS THERMOSALINOGRAPHS
Place keywords	NODC SEA AREA NAMES THESAURUS Gulf of Mexico North Atlantic Ocean Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO Provider Geographic Names Gulf of Mexico North Atlantic Ocean
Project keywords	NODC PROJECT NAMES THESAURUS US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP) Cruise ID WS0523-Leg1, transit WS0523-Leg2, UGA Coastal Cruise WS0523-Leg3, transit WS0525, FL Bay EXPOCODE 33WA20051004 33WA20051007 33WA20051018 33WA20051028 Ocean Acidification Search Keywords Ocean Carbon and Acidification Data System (OCADS) Project Reference Section ID SOOP_CO2, SFER
Keywords	NCEI ACCESSION NUMBER 0241959

Use Constraints	Cite as: Pierrot, Denis; Wanninkhof, Rik; Sullivan, Kevin F. (2021). Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations from R/V F.G. Walton Smith coastal cruises in the Atlantic Ocean and Gulf of Mexico in 2005 (NCEI Accession 0241959). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/0qpy-7675. 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	2021-10-14T23:03:12Z - NCEI Accession 0241959 v1.1 was published.
Output Datasets	NCEI Accession 0241959 v1.1 NCEI Accession 0241959 v1.1 (download) published 2021-10-14T23:03:12Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: Mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature (ppm); Abbreviation: xCO2_EQU_ppm; Unit: ppm; Controlled vocabulary name: xCO2_EQU_ppm; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Intake Depth: 1.5 meters Intake Location: Bow Equilibration Type: Spray head above dynamic pool, no thermal jacket Equilibrator Volume (L): 0.95 L (0.4 L water, 0.55 L headspace) Headspace Gas Flow Rate (ml/min): 70 - 150 ml/min Equilibrator Water Flow Rate (L/min): 1.5 - 2.0 L/min Equilibrator Vented: Yes Equilibration Comments: Primary equilibrator is vented through a secondary equilibrator. The system is a CCN-Gen2 system. Drying Method: Gas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry). Measurement Method: IR Method details: details of CO2 sensing (not required) Manufacturer: LI-COR Model: 6262 Measured CO2 Values: xco2(dry) Measurement Frequency: Every 140 seconds, except during calibration Aqueous CO2 Accuracy: ± 2 μatm in fCO2_SW Aqueous CO2 Precision: ± 0.01 μatm in fCO2_SW Sensor Calibrations: Calibration of Calibration Gases: The analyzer is calibrated every ~2.1 hours using field standards that were calibrated with primary standards at AOML that are directly traceable to the WMO scale (CO2_X2019).Number Non-Zero Gas Standards: 4 Calibration Gases: Std 1: CA01433, 293.79 ppm, owned by ESRL, used every ~2.1 hours. Std 2: CA05098, 358.98 ppm, owned by ESRL, used every ~2.1 hours. Std 3: CC71655, 423.51 ppm, owned by ESRL, used every ~2.1 hours. Std 4: CC106643, 519.15 ppm, owned by ESRL, used every ~2.1 hours.; Method reference: Pierrot, D., C. Neil, K. Sullivan, R. Castle, R. Wanninkhof, H. Lüger, T. Johannessen, A. Olsen, R. A. Feely, and C. E. Cosca (2009), Recommendations for autonomous underway pCO2 measuring systems and data reduction routines, Deep-Sea Res II, 56, 512-522. Parameter or Variable: Mole fraction of CO2 measured in dry outside air (ppm); Abbreviation: xCO2_ATM_ppm; Unit: ppm; Controlled vocabulary name: xCO2_ATM_ppm; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Measured/Frequency: Yes, 5 readings in a group every 2.1 hours Intake Location: On mast above the bridge at ~13 meters above the sea surface Drying Method: Gas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry). Atmospheric CO2 Accuracy: ± 0.5 μatm in fCO2_ATM Atmospheric CO2 Precision: ± 0.01 μatm in fCO2_ATM. Parameter or Variable: Mole fraction of CO2 in outside air associated with each water analysis. These values are interpolated between the bracketing averaged good xCO2_ATM analyses (ppm); Abbreviation: xCO2_ATM_interpolated_ppm; Unit: Mole fraction of CO2 in outside air associated with each water analysis. These values are interpolated between the bracketing averaged good xCO2_ATM analyses (ppm); Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: PRES_EQU_hPa; Abbreviation: PRES_EQU_hPa; Unit: Barometric pressure in the equilibrator headspace (hPa); In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: PRES_ATM@SSP_hPa; Abbreviation: PRES_ATM@SSP_hPa; Unit: Barometric pressure measured outside, corrected to sea level (hPa); Controlled vocabulary name: BAROMETRIC PRESSURE; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Location: In deck box above winch control shack, ~10 m above sea surface. Normalized to Sea Level: no Manufacturer: Druck Model: RPT350 Accuracy: ± 0.08 (hPa if units not given) Precision: 0.01 (hPa if units not given) Calibration: Factory calibration, hPa Comments: Manufacturer's Resolution is taken as Precision.. Parameter or Variable: TEMP_EQU_C; Abbreviation: TEMP_EQU_C; Unit: Water temperature in equilibrator (°C); In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Location: Inserted into equilibrator ~5 cm below water level Manufacturer: Omega Engineering, Inc Model: RTD Probe, IEC/DIN Class A Accuracy: ± 0.15 (°C if units not given) Precision: 0.01 (°C if units not given) Calibration: Factory calibration, degree Celsius Comments: Resolution is taken as Precision.. Parameter or Variable: SST_C; Abbreviation: SST_C; Unit: Sea surface temperature (°C); Controlled vocabulary name: SEA SURFACE TEMPERATURE; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Location: After sea water pump in the forward, port hull Manufacturer: Seabird, Inc. Model: SBE 38 Accuracy: ± 0.001 (°C if units not given) Precision: 0.0003 (°C if units not given) Calibration: Factory calibration, degree Celsius Comments: Manufacturer's Resolution is taken as Precision; Maintained by ship.. Parameter or Variable: SAL_permil; Abbreviation: SAL_permil; Unit: Sea surface salinity on Practical Salinity Scale (o/oo); Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Location: In the dry lab along with pCO2 system Manufacturer: Seabird Model: SBE 45 Accuracy: ± 0.005 Precision: 0.0002 Calibration: Factory calibration, o/oo psu Comments: Manufacturer's Resolution is taken as Precision. Parameter or Variable: Fugacity of CO2 in sea water at SST and 100% humidity (μatm); Abbreviation: fCO2_SW@SST_uatm; Unit: μatm; Controlled vocabulary name: fCO2_SW@SST_uatm; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Fugacity of CO2 in air corresponding to the interpolated xCO2 at SST and 100% humidity (μatm); Abbreviation: fCO2_ATM_interpolated_uatm; Unit: μatm; Controlled vocabulary name: fCO2_ATM_interpolated_uatm; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Sea water fCO2 minus interpolated air fCO2 (μatm); Abbreviation: dfCO2_uatm; Unit: μatm; Controlled vocabulary name: dfCO2_uatm; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: WOCE_QC_FLAG; Abbreviation: WOCE_QC_FLAG; Unit: Quality control flag for fCO2 values (2=good, 3=questionable); In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: QC_SUBFLAG; Abbreviation: QC_SUBFLAG; Unit: Quality control subflag for fCO2 values, provides explanation when QC flag=3; In-situ / Manipulation / Response variable: in-situ .

Lineage information for: dataset

Processing Steps

Parameter or Variable: Mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature (ppm); Abbreviation: xCO2_EQU_ppm; Unit: ppm; Controlled vocabulary name: xCO2_EQU_ppm; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Intake Depth: 1.5 meters Intake Location: Bow Equilibration Type: Spray head above dynamic pool, no thermal jacket Equilibrator Volume (L): 0.95 L (0.4 L water, 0.55 L headspace) Headspace Gas Flow Rate (ml/min): 70 - 150 ml/min Equilibrator Water Flow Rate (L/min): 1.5 - 2.0 L/min Equilibrator Vented: Yes Equilibration Comments: Primary equilibrator is vented through a secondary equilibrator. The system is a CCN-Gen2 system. Drying Method: Gas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry). Measurement Method: IR Method details: details of CO2 sensing (not required) Manufacturer: LI-COR Model: 6262 Measured CO2 Values: xco2(dry) Measurement Frequency: Every 140 seconds, except during calibration Aqueous CO2 Accuracy: ± 2 μatm in fCO2_SW Aqueous CO2 Precision: ± 0.01 μatm in fCO2_SW Sensor Calibrations: Calibration of Calibration Gases: The analyzer is calibrated every ~2.1 hours using field standards that were calibrated with primary standards at AOML that are directly traceable to the WMO scale (CO2_X2019).Number Non-Zero Gas Standards: 4 Calibration Gases: Std 1: CA01433, 293.79 ppm, owned by ESRL, used every ~2.1 hours. Std 2: CA05098, 358.98 ppm, owned by ESRL, used every ~2.1 hours. Std 3: CC71655, 423.51 ppm, owned by ESRL, used every ~2.1 hours. Std 4: CC106643, 519.15 ppm, owned by ESRL, used every ~2.1 hours.; Method reference: Pierrot, D., C. Neil, K. Sullivan, R. Castle, R. Wanninkhof, H. Lüger, T. Johannessen, A. Olsen, R. A. Feely, and C. E. Cosca (2009), Recommendations for autonomous underway pCO2 measuring systems and data reduction routines, Deep-Sea Res II, 56, 512-522.
Parameter or Variable: Mole fraction of CO2 measured in dry outside air (ppm); Abbreviation: xCO2_ATM_ppm; Unit: ppm; Controlled vocabulary name: xCO2_ATM_ppm; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Measured/Frequency: Yes, 5 readings in a group every 2.1 hours Intake Location: On mast above the bridge at ~13 meters above the sea surface Drying Method: Gas stream passes through a thermoelectric condenser (~5 °C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry). Atmospheric CO2 Accuracy: ± 0.5 μatm in fCO2_ATM Atmospheric CO2 Precision: ± 0.01 μatm in fCO2_ATM.
Parameter or Variable: Mole fraction of CO2 in outside air associated with each water analysis. These values are interpolated between the bracketing averaged good xCO2_ATM analyses (ppm); Abbreviation: xCO2_ATM_interpolated_ppm; Unit: Mole fraction of CO2 in outside air associated with each water analysis. These values are interpolated between the bracketing averaged good xCO2_ATM analyses (ppm); Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: PRES_EQU_hPa; Abbreviation: PRES_EQU_hPa; Unit: Barometric pressure in the equilibrator headspace (hPa); In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: PRES_ATM@SSP_hPa; Abbreviation: PRES_ATM@SSP_hPa; Unit: Barometric pressure measured outside, corrected to sea level (hPa); Controlled vocabulary name: BAROMETRIC PRESSURE; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Location: In deck box above winch control shack, ~10 m above sea surface. Normalized to Sea Level: no Manufacturer: Druck Model: RPT350 Accuracy: ± 0.08 (hPa if units not given) Precision: 0.01 (hPa if units not given) Calibration: Factory calibration, hPa Comments: Manufacturer's Resolution is taken as Precision..
Parameter or Variable: TEMP_EQU_C; Abbreviation: TEMP_EQU_C; Unit: Water temperature in equilibrator (°C); In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Location: Inserted into equilibrator ~5 cm below water level Manufacturer: Omega Engineering, Inc Model: RTD Probe, IEC/DIN Class A Accuracy: ± 0.15 (°C if units not given) Precision: 0.01 (°C if units not given) Calibration: Factory calibration, degree Celsius Comments: Resolution is taken as Precision..
Parameter or Variable: SST_C; Abbreviation: SST_C; Unit: Sea surface temperature (°C); Controlled vocabulary name: SEA SURFACE TEMPERATURE; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Location: After sea water pump in the forward, port hull Manufacturer: Seabird, Inc. Model: SBE 38 Accuracy: ± 0.001 (°C if units not given) Precision: 0.0003 (°C if units not given) Calibration: Factory calibration, degree Celsius Comments: Manufacturer's Resolution is taken as Precision; Maintained by ship..
Parameter or Variable: SAL_permil; Abbreviation: SAL_permil; Unit: Sea surface salinity on Practical Salinity Scale (o/oo); Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ; Detailed sampling and analyzing information: Location: In the dry lab along with pCO2 system Manufacturer: Seabird Model: SBE 45 Accuracy: ± 0.005 Precision: 0.0002 Calibration: Factory calibration, o/oo psu Comments: Manufacturer's Resolution is taken as Precision.
Parameter or Variable: Fugacity of CO2 in sea water at SST and 100% humidity (μatm); Abbreviation: fCO2_SW@SST_uatm; Unit: μatm; Controlled vocabulary name: fCO2_SW@SST_uatm; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Fugacity of CO2 in air corresponding to the interpolated xCO2 at SST and 100% humidity (μatm); Abbreviation: fCO2_ATM_interpolated_uatm; Unit: μatm; Controlled vocabulary name: fCO2_ATM_interpolated_uatm; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Sea water fCO2 minus interpolated air fCO2 (μatm); Abbreviation: dfCO2_uatm; Unit: μatm; Controlled vocabulary name: dfCO2_uatm; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: WOCE_QC_FLAG; Abbreviation: WOCE_QC_FLAG; Unit: Quality control flag for fCO2 values (2=good, 3=questionable); In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: QC_SUBFLAG; Abbreviation: QC_SUBFLAG; Unit: Quality control subflag for fCO2 values, provides explanation when QC flag=3; In-situ / Manipulation / Response variable: in-situ .

Acquisition Information (collection)
Instrument	barometric pressure sensor carbon dioxide (CO2) gas analyzer temperature sensor thermosalinograph
Platform	R/V F.G. Walton Smith

Last Modified: 2024-05-23T13:43:42Z
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Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations from R/V F.G. Walton Smith coastal cruises in the Atlantic Ocean and Gulf of Mexico in 2005 (NCEI Accession 0241959)

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