Dataset Overview | National Centers for Environmental Information (NCEI)

Surface underway measurements of partial pressure of carbon dioxide (pCO2), sea surface temperature, sea surface salinity and other parameters from Autonomous Surface Vehicle (ASV) Saildrone 1039 (EXPOCODE 316420220901) in the Indian Ocean, Southern Ocean from 2022-09-01 to 2023-04-27 (NCEI Accession 0300658)

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This dataset includes surface underway chemical, meteorological and physical data collected from Autonomous Surface Vehicle (ASV) Saildrone 1039 (EXPOCODE 316420220901) in the Indian Ocean, Southern Ocean from 2022-09-01 to 2023-04-27. These data include xCO2 SW (wet) - mole fraction of CO2 in air in equilibrium with the seawater at sea surface temperature and measured humidity; H2O SW - Mole fraction of H2O in air from equilibrator; xCO2 Air (wet) - Mole fraction of CO2 in air from airblock, 0.67m (26") above the sea surface at measured humidity; H2O Air - Mole fraction of H2O in air from airblock, 0.67m (26") above the sea surface; Atmospheric pressure at the airblock, 0.67m (26") above the sea surface; Atmospheric pressure at the airblock, 0.67m (26") above the sea surface; Temperature of the Infrared Licor 820 in degrees Celsius; MAPCO2 %O2 - The percent oxygen of the surface seawater divided by the percent oxygen of the atmosphere at 0.67m (26") above the sea surface; Sea Surface Temperature; Sea Surface Salinity; xCO2 SW (dry) - Mole fraction of CO2 in air in equilibrium with the seawater at sea surface temperature (dry air); xCO2 Air (dry) - Mole fraction of CO2 in air at the airblock, 0.67m (26") above the sea surface (dry air); fCO2 SW (sat) - Fugacity of CO2 in air in equilibrium with the seawater at sea surface temperature (100% humidity); fCO2 Air (sat) - Fugacity of CO2 in air at the airblock, 0.67m (26") above the sea surface (100% humidity); dfCO2 - Difference of the fugacity of the CO2 in seawater and the fugacity of the CO2 in air (fCO2 SW - fCO2 Air); pCO2 SW (wet) - Partial Pressure of CO2 in air in equilibrium with the seawater at sea surface temperature (100% humidity); pCO2 Air (wet) - Partial Pressure of CO2 in air at the airblock, 0.67m (26") above the sea surface (100% humidity); dpCO2 - Difference of the partial pressure of CO2 in seawater and air (pCO2 SW - pCO2 Air; pH of Seawater (total scale). The Autonomous Surface Vehicle CO2 (ASVCO2) instruments used to collect these data include Bubble type equilibrator for autonomous carbon dioxide (CO2) measurement, Carbon dioxide (CO2) gas analyzer, Humidity Sensor, and oxygen meter.

Dataset Citation

Cite as: Chambers, Don P.; Bonin, Jennifer; Tamsitt, Veronica; Williams, Nancy L.; Sutton, Adrienne J.; Maenner Jones, Stacy; Battisti, Roman; Osborne, John; Bott, Randy (2025). Surface underway measurements of partial pressure of carbon dioxide (pCO2), sea surface temperature, sea surface salinity and other parameters from Autonomous Surface Vehicle (ASV) Saildrone 1039 (EXPOCODE 316420220901) in the Indian Ocean, Southern Ocean from 2022-09-01 to 2023-04-27 (NCEI Accession 0300658). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/6b0k-r665. Accessed [date].

Dataset Identifiers

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gov.noaa.nodc:0300658

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Download Data	HTTPS (download) Navigate directly to the URL for data access and direct download. FTP (download) These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
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	2022-09-01 to 2023-04-27
Spatial Bounding Box Coordinates	West: 13.321 East: 101.918 South: -54.597 North: -37.951
Spatial Coverage Map

General Documentation

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Associated Resources

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, H. J., & Kozyr, A. (2014). A high-frequency atmospheric and seawater &lt;i&gt;p&lt;/i&gt;CO&lt;sub&gt;2&lt;/sub&gt; data set from 14 open-ocean sites using a moored autonomous system. Earth System Science Data, 6(2), 353–366. https://doi.org/10.5194/essd-6-353-2014
- https://doi.org/10.5194/essd-6-353-2014
  journal article
Autonomous Surface Vehicle (ASV) Data
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/ASV/
  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: 2025-01-15
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: Chambers, Don P.; Bonin, Jennifer; Tamsitt, Veronica; Williams, Nancy L.; Sutton, Adrienne J.; Maenner Jones, Stacy; Battisti, Roman; Osborne, John; Bott, Randy (2025). Surface underway measurements of partial pressure of carbon dioxide (pCO2), sea surface temperature, sea surface salinity and other parameters from Autonomous Surface Vehicle (ASV) Saildrone 1039 (EXPOCODE 316420220901) in the Indian Ocean, Southern Ocean from 2022-09-01 to 2023-04-27 (NCEI Accession 0300658). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/6b0k-r665. Accessed [date].
Cited Authors	Chambers, Don P. University of South Florida (USF) Bonin, Jennifer University of South Florida (USF) Tamsitt, Veronica University of South Florida (USF) Williams, Nancy L. University of South Florida (USF) Sutton, Adrienne J. NOAA Pacific Marine Environmental Laboratory (PMEL) Maenner Jones, Stacy NOAA Pacific Marine Environmental Laboratory (PMEL) Battisti, Roman NOAA Pacific Marine Environmental Laboratory (PMEL) Osborne, John University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) Bott, Randy NOAA Pacific Marine Environmental Laboratory (PMEL)
Principal Investigators	Adrienne Sutton US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL) Stacy Maenner Jones US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL) Jennifer Bonin University of South Florida (USF) Don Chambers University of South Florida (USF) Veronica Tamsitt University of South Florida (USF) Nancy Louise Williams University of South Florida (USF) Roman Battisti US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL) John Osborne University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) Randy Bott US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL)
Contributors	University of South Florida (USF) US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL)
Resource Providers	Roman Battisti 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: NOAA Climate Program (Ocean Acidification Program, Autonomous Surface Vehicle, Saildrone)

Theme keywords	NODC DATA TYPES THESAURUS BAROMETRIC PRESSURE Delta pCO2 OXYGEN - PERCENT SATURATION Partial pressure (or fugacity) of carbon dioxide - atmosphere partial pressure of carbon dioxide - water pH SALINITY - SURFACE WATER WATER TEMPERATURE xCO2 seawater NODC OBSERVATION TYPES THESAURUS chemical 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 > 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 CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY OCADS Study Type Continuous measurement Surface underway Provider Keywords Saildrone Provider Variable Abbreviations %O2 CO2 Air QF CO2 SW QF Delta fCO2 (fCO2 SW - fCO2 Air) H2O Air H2O SW Licor Atm Pressure Licor Temp Pressure of Licor SS Salinity SST dpCO2 fCO2 Air (sat) fCO2 SW (sat) pCO2 Air (wet) pCO2 SW (wet) pH (total scale) xCO2 Air (dry) xCO2 Air (wet) xCO2 SW (dry) xCO2 SW (wet)
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS University of South Florida US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/OAR/PMEL > Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce
Platform keywords	NODC PLATFORM NAMES THESAURUS MOORINGS OF UNITED STATES ICES/SeaDataNet Ship Codes MOORINGS (ICES code: 3164)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS barometric pressure sensor carbon dioxide (CO2) gas analyzer oxygen sensor pH sensor salinometer temperature sensor Global Change Master Directory (GCMD) Instrument Keywords BAROMETERS > BAROMETERS CO2 ANALYZERS > CO2 ANALYZERS OXYGEN METERS > OXYGEN METERS PH METERS > PH METERS SALINOMETERS TEMPERATURE SENSORS > TEMPERATURE SENSORS
Place keywords	NODC SEA AREA NAMES THESAURUS Indian Ocean Southern Ocean Global Change Master Directory (GCMD) Location Keywords OCEAN > INDIAN OCEAN OCEAN > SOUTHERN OCEAN Provider Geographic Names Indean Ocean Southern Ocean
Project keywords	NODC PROJECT NAMES THESAURUS Ship of Opportunity Programme (SOOP) Surface Ocean CO2 Atlas (SOCAT) US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP) Cruise ID 316420220901_ASV_Saildrone1039_Southern_Ocean_Sep2022_Apr2023 EXPOCODE 316420220901 Ocean Acidification Search Keywords Ocean Carbon and Acidification Data System (OCADS) Project Reference Section ID Saildrones Research Projects NOAA Ocean Acidification Program (OAP)
Keywords	NCEI ACCESSION NUMBER 0300658

Use Constraints	Cite as: Chambers, Don P.; Bonin, Jennifer; Tamsitt, Veronica; Williams, Nancy L.; Sutton, Adrienne J.; Maenner Jones, Stacy; Battisti, Roman; Osborne, John; Bott, Randy (2025). Surface underway measurements of partial pressure of carbon dioxide (pCO2), sea surface temperature, sea surface salinity and other parameters from Autonomous Surface Vehicle (ASV) Saildrone 1039 (EXPOCODE 316420220901) in the Indian Ocean, Southern Ocean from 2022-09-01 to 2023-04-27 (NCEI Accession 0300658). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/6b0k-r665. 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	2025-01-15T18:43:26Z - NCEI Accession 0300658 v1.1 was published.
Output Datasets	NCEI Accession 0300658 v1.1 NCEI Accession 0300658 v1.1 (download) published 2025-01-15T18:43:26Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: xCO2 SW (wet); Abbreviation: xCO2 SW (wet); Unit: [μmol/mol]; Controlled vocabulary name: partial pressure of carbon dioxide - water; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: H2O SW; Abbreviation: H2O SW; Unit: [mmol/mol]; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: xCO2 Air (wet); Abbreviation: xCO2 Air (wet); Unit: [μmol/mol]; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: H2O Air; Abbreviation: H2O Air; Unit: [mmol/mol]; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Pressure of Licor; Abbreviation: Pressure of Licor; Unit: [hPa]; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Licor Temp; Abbreviation: Licor Temp; Unit: [Deg. C]; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: SST; Abbreviation: SST; Unit: [Deg. C]; Controlled vocabulary name: SEA SURFACE TEMPERATURE; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: SS Salinity; Abbreviation: SS Salinity; Controlled vocabulary name: SALINITY; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: xCO2 SW (dry); Abbreviation: xCO2 SW (dry); Unit: [μmol/mol]; Controlled vocabulary name: partial pressure of carbon dioxide - water; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: xCO2 Air (dry); Abbreviation: xCO2 Air (dry); Unit: [μmol/mol]; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: fCO2 SW (sat); Abbreviation: fCO2 SW (sat); Unit: [uatm]; Controlled vocabulary name: partial pressure of carbon dioxide - water; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: fCO2 Air (sat); Abbreviation: fCO2 Air (sat); Unit: [uatm]; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Delta fCO2 (fCO2 SW - fCO2 Air); Abbreviation: Delta fCO2 (fCO2 SW - fCO2 Air); Unit: [uatm]; Controlled vocabulary name: AIR-SEA DIFFERENCE - PARTIAL PRESSURE (OR FUGACITY) OF CARBON DIOXIDE; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: CO2 SW QF; Abbreviation: CO2 SW QF; Unit: Flag for xCO2 sw (wet); In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: CO2 Air QF; Abbreviation: CO2 Air QF; Unit: Quality Flag for xCO2 Air (wet); In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: Licor Atm Pressure; Abbreviation: Licor Atm Pressure; Unit: (hPa) Atmospheric pressure at the airblock, 4 feet above the sea surface.; Controlled vocabulary name: BAROMETRIC PRESSURE; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: %O2; Abbreviation: %O2; Unit: The percent oxygen of the surface seawater divided by the percent oxygen of the atmosphere at 4 feet above the sea surface. Disclaimer: The oxygen measurement is made in the equilibrated air. We have found that the oxygen does not come to complete equilibrium so any rapid changes in oxygen do not get properly captured using this system. Therefore, we tend to use the oxygen data only as a qualitative sense of the biology. It is not a quantitative measure.; Controlled vocabulary name: OXYGEN - PERCENT SATURATION; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: pCO2 SW (wet); Abbreviation: pCO2 SW (wet); Unit: (uatm) Partial Pressure of CO2 in air in equilibrium with the seawater at sea surface temperature (100% humidity); Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: pCO2 Air (wet); Abbreviation: pCO2 Air (wet); Unit: (uatm) Partial Pressure of CO2 in air at the airblock, 4 feet above the sea surface (100% humidity).; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: dpCO2; Abbreviation: dpCO2; Unit: Difference of the partial pressure of CO2 in seawater and air (pCO2 SW - pCO2 Air; Controlled vocabulary name: AIR-SEA DIFFERENCE - PARTIAL PRESSURE (OR FUGACITY) OF CARBON DIOXIDE; In-situ / Manipulation / Response variable: in-situ. Parameter or Variable: pH on Total Scale; Abbreviation: pH (total scale); Controlled vocabulary name: pH; In-situ / Manipulation / Response variable: in-situ .

Lineage information for: dataset

Processing Steps

Parameter or Variable: xCO2 SW (wet); Abbreviation: xCO2 SW (wet); Unit: [μmol/mol]; Controlled vocabulary name: partial pressure of carbon dioxide - water; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: H2O SW; Abbreviation: H2O SW; Unit: [mmol/mol]; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: xCO2 Air (wet); Abbreviation: xCO2 Air (wet); Unit: [μmol/mol]; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: H2O Air; Abbreviation: H2O Air; Unit: [mmol/mol]; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Pressure of Licor; Abbreviation: Pressure of Licor; Unit: [hPa]; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Licor Temp; Abbreviation: Licor Temp; Unit: [Deg. C]; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: SST; Abbreviation: SST; Unit: [Deg. C]; Controlled vocabulary name: SEA SURFACE TEMPERATURE; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: SS Salinity; Abbreviation: SS Salinity; Controlled vocabulary name: SALINITY; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: xCO2 SW (dry); Abbreviation: xCO2 SW (dry); Unit: [μmol/mol]; Controlled vocabulary name: partial pressure of carbon dioxide - water; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: xCO2 Air (dry); Abbreviation: xCO2 Air (dry); Unit: [μmol/mol]; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: fCO2 SW (sat); Abbreviation: fCO2 SW (sat); Unit: [uatm]; Controlled vocabulary name: partial pressure of carbon dioxide - water; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: fCO2 Air (sat); Abbreviation: fCO2 Air (sat); Unit: [uatm]; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Delta fCO2 (fCO2 SW - fCO2 Air); Abbreviation: Delta fCO2 (fCO2 SW - fCO2 Air); Unit: [uatm]; Controlled vocabulary name: AIR-SEA DIFFERENCE - PARTIAL PRESSURE (OR FUGACITY) OF CARBON DIOXIDE; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: CO2 SW QF; Abbreviation: CO2 SW QF; Unit: Flag for xCO2 sw (wet); In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: CO2 Air QF; Abbreviation: CO2 Air QF; Unit: Quality Flag for xCO2 Air (wet); In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: Licor Atm Pressure; Abbreviation: Licor Atm Pressure; Unit: (hPa) Atmospheric pressure at the airblock, 4 feet above the sea surface.; Controlled vocabulary name: BAROMETRIC PRESSURE; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: %O2; Abbreviation: %O2; Unit: The percent oxygen of the surface seawater divided by the percent oxygen of the atmosphere at 4 feet above the sea surface. Disclaimer: The oxygen measurement is made in the equilibrated air. We have found that the oxygen does not come to complete equilibrium so any rapid changes in oxygen do not get properly captured using this system. Therefore, we tend to use the oxygen data only as a qualitative sense of the biology. It is not a quantitative measure.; Controlled vocabulary name: OXYGEN - PERCENT SATURATION; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: pCO2 SW (wet); Abbreviation: pCO2 SW (wet); Unit: (uatm) Partial Pressure of CO2 in air in equilibrium with the seawater at sea surface temperature (100% humidity); Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: pCO2 Air (wet); Abbreviation: pCO2 Air (wet); Unit: (uatm) Partial Pressure of CO2 in air at the airblock, 4 feet above the sea surface (100% humidity).; Controlled vocabulary name: Partial pressure (or fugacity) of carbon dioxide - atmosphere; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: dpCO2; Abbreviation: dpCO2; Unit: Difference of the partial pressure of CO2 in seawater and air (pCO2 SW - pCO2 Air; Controlled vocabulary name: AIR-SEA DIFFERENCE - PARTIAL PRESSURE (OR FUGACITY) OF CARBON DIOXIDE; In-situ / Manipulation / Response variable: in-situ.
Parameter or Variable: pH on Total Scale; Abbreviation: pH (total scale); Controlled vocabulary name: pH; In-situ / Manipulation / Response variable: in-situ .

Acquisition Information (collection)
Instrument	barometric pressure sensor carbon dioxide (CO2) gas analyzer oxygen sensor pH sensor salinometer temperature sensor
Platform	MOORINGS OF UNITED STATES

Last Modified: 2025-02-21T13:36:25Z
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