gov.noaa.nodc:0287338 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2026-07-30T07:46:17Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Fugacity of carbon dioxide (fCO2), temperature, salinity and other variables collected from surface underway observations using shower head equilibrator, carbon dioxide gas detector and other instruments from R/V Roger Revelle cruises in the South Atlantic and Indian Oceans in 2023 (NCEI Accession 0287338) 2024-05-03 publication 2024-01-16 creation International DOI Foundation (IDF) 10.25921/3s1w-qn91 NOAA National Centers for Environmental Information gov.noaa.nodc:0287338 NCEI Archive Management System 0287338 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Susan Curless NOAA Pacific Marine Environmental Laboratory (PMEL) susan.curless@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information resourceProvider NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information resourceProvider Simone R. Alin NOAA Pacific Marine Environmental Laboratory (PMEL) simone.r.alin@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information principalInvestigator Richard Feely NOAA Pacific Marine Environmental Laboratory (PMEL) Richard.A.Feely@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information principalInvestigator Andrew Collins University of Washington Joint Institute for the Study of the Atmosphere and Ocean (JISAO) andrew.collins@noaa.gov https://cicoes.uw.edu/ HTTPS University of Washington Joint Institute for the Study of the Atmosphere and Ocean (JISAO) website Institution web page information principalInvestigator Susan Curless NOAA Pacific Marine Environmental Laboratory (PMEL) susan.curless@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information collaborator Alin, Simone R. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Collins, Andrew University of Washington Joint Institute for the Study of the Atmosphere and Ocean andrew.collins@noaa.gov https://cicoes.uw.edu/ HTTPS University of Washington Joint Institute for the Study of the Atmosphere and Ocean (JISAO) website Institution web page information author Feely, Richard A. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Curless, Susan NOAA Pacific Marine Environmental Laboratory susan.curless@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information contributor tableDigital This dataset consists of surface underway ocean measurements of fugacity of carbon dioxide (fCO2), salinity, and sea surface temperature collected during R/V Roger Revelle cruises in the South Atlantic and Indian Oceans from 2023-02-04 to 2023-09-13. These measurements were collected with support from NOAA's Climate Program Office (CPO). The major objectives of the project were to characterize and map the key indicators of ocean acidification (OA) in Pacific waters, and to continue a time series documenting the distribution of surface and atmospheric fCO2, salinity, temperature, and other parameters. Funding Information: NOAA Climate Program Office Ocean Observing and Monitoring Division (CPO/OOMD) (Surface water pCO2 measurements from ships) completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0287338 Preview graphic PNG 0287338 NCEI ACCESSION NUMBER 2024-01-12 publication BAROMETRIC PRESSURE Partial pressure (or fugacity) of carbon dioxide - atmosphere partial pressure of carbon dioxide - water SALINITY - SURFACE WATER WATER TEMPERATURE theme NODC DATA TYPES THESAURUS barometric pressure sensor carbon dioxide (CO2) gas analyzer showerhead equilibrator temperature sensor thermosalinograph instrument NODC INSTRUMENT TYPES THESAURUS chemical meteorological physical surface underway theme NODC OBSERVATION TYPES THESAURUS R/V Roger Revelle platform NODC PLATFORM NAMES THESAURUS NOAA Pacific Marine Environmental Laboratory dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Pacific Marine Environmental Laboratory dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ship of Opportunity Programme (SOOP) Surface Ocean CO2 Atlas (SOCAT) The Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) project NODC PROJECT NAMES THESAURUS Indian Ocean South Atlantic Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/OAR/PMEL > Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. 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 information custodian RR23207 project Cruise ID 33RR20230722 project EXPOCODE Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords I05, SOOP Cruises project Reference Section ID 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 theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. 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 information custodian Surface underway theme OCADS Study Type SAL_PSU SST_C fCO2_SW@SST_uatm, dfCO2_uatm theme Provider Variable Abbreviations BAROMETERS > BAROMETERS CO2 ANALYZERS > CO2 ANALYZERS EQUILIBRATORS TEMPERATURE SENSORS > TEMPERATURE SENSORS THERMOSALINOGRAPHS instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. 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 information custodian Ships platform Global Change Master Directory (GCMD) Platform Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. 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 information custodian ROGER REVELLE (call sign: KAOU, ICES code: 33RR, 1996-) platform ICES/SeaDataNet Ship Codes OCEAN > ATLANTIC OCEAN > SOUTH ATLANTIC OCEAN OCEAN > INDIAN OCEAN place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. 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 information custodian Indian Ocean place Provider Geographic Names accessLevel: public otherRestrictions Cite as: Alin, Simone R.; Collins, Andrew; Feely, Richard A.; Curless, Susan (2024). Fugacity of carbon dioxide (fCO2), temperature, salinity and other variables collected from surface underway observations using shower head equilibrator, carbon dioxide gas detector and other instruments from R/V Roger Revelle cruises in the South Atlantic and Indian Oceans in 2023 (NCEI Accession 0287338). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/3s1w-qn91. Accessed [date]. 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. otherRestrictions 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. Dickson, A. G., & et, al. (2007). Guide to best practices for ocean CO2 measurement. . North Pacific Marine Science Organization. https://doi.org/10.25607/obp-1342 2007 publication International DOI Foundation (IDF) https://doi.org/10.25607/obp-1342 https://doi.org/10.25607/obp-1342 HTTPS https://doi.org/10.25607/obp-1342 related report information Dickson, A.G. author et, al author North Pacific Marine Science Organization publisher documentDigital crossReference project Feely, R. A., Wanninkhof, R., Milburn, H. B., Cosca, C. E., Stapp, M., & P. Murphy, P. (1998). A new automated underway system for making high precision pCO2 measurements onboard research ships. Analytica Chimica Acta, 377(2–3), 185–191. https://doi.org/10.1016/s0003-2670(98)00388-2 1998-12 publication International DOI Foundation (IDF) https://doi.org/10.1016/s0003-2670(98)00388-2 https://doi.org/10.1016/s0003-2670(98)00388-2 HTTPS https://doi.org/10.1016/s0003-2670(98)00388-2 related journal article information Feely, Richard A. author Wanninkhof, Rik author Milburn, Hugh B. author Cosca, Catherine E. author Stapp, Mike author P. Murphy, Paulette author Elsevier BV publisher documentDigital Analytica Chimica Acta 377(2-3) ISSN 0003-2670, pp. 185-191 crossReference project 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 2009-04 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.dsr2.2008.12.005 https://doi.org/10.1016/j.dsr2.2008.12.005 HTTPS https://doi.org/10.1016/j.dsr2.2008.12.005 related journal article information Pierrot, Denis author Neill, Craig author Sullivan, Kevin author Castle, Robert author Wanninkhof, Rik author Lüger, Heike author Johannessen, Truls author Olsen, Are author Feely, Richard A. author Cosca, Catherine E. author Elsevier BV publisher documentDigital Deep Sea Research Part II: Topical Studies in Oceanography 56(8-10) ISSN 0967-0645, pp. 512-522 crossReference project Wanninkhof, R., & Thoning, K. (1993). Measurement of fugacity of CO2 in surface water using continuous and discrete sampling methods. Marine Chemistry, 44(2–4), 189–204. https://doi.org/10.1016/0304-4203(93)90202-y 1993-12 publication International DOI Foundation (IDF) https://doi.org/10.1016/0304-4203(93)90202-y https://doi.org/10.1016/0304-4203(93)90202-y HTTPS https://doi.org/10.1016/0304-4203(93)90202-y related journal article information Wanninkhof, Rik author Thoning, Kirk author Elsevier BV publisher documentDigital Marine Chemistry 44(2-4) ISSN 0304-4203, pp. 189-204 crossReference project R/V Roger Revelle Underway Lines 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/VOS_Program/Revelle.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/VOS_Program/Revelle.html Related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project 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 2022-04 publication https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system HTTPS https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system OCADS website information NOAA National Centers for Environmental Information author NOAA National Centers for Environmental Information (NCEI) publisher documentDigital [accessed 2024-02-08] crossReference program NOAA Pacific Marine Environmental Laboratory Carbon Program. publication https://www.pmel.noaa.gov/co2/ HTTPS https://www.pmel.noaa.gov/co2/ Related resource information documentDigital crossReference project Carter, Brendan R.; McMonigal, Kay; Feely, Richard A.; Wanninkhof, Rik; Dickson, Andrew G.; Talley, Lynne D.; Becker, Susan; Carlson, Craig A.; Warner, Mark J. (2025). Dissolved inorganic carbon (DIC), total alkalinity (TA), pH on total scale, dissolved organic carbon (DOC), chlorofluorocarbons (CFC11, CFC12), water temperature, salinity, dissolved oxygen, nutrients and other hydrographic and chemical variables collected from discrete samples and profile observations during the R/V Roger Revelle cruise on GO-SHIP repeat section I05 (EXPOCODE 33RR20230722) in the Indian Ocean, Southern Ocean from 2023-07-22 to 2023-09-14 (NCEI Accession 0308399). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/tdp8-ax29. 2025-10-17 publication International DOI Foundation (IDF) https://doi.org/10.25921/tdp8-ax29 NOAA National Centers for Environmental Information gov.noaa.nodc:0308399 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0308399.html HTTPS https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0308399.html Related dataset information Carter, Brendan R. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author McMonigal, Kay University of Alaska author Feely, Richard A. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Wanninkhof, Rik NOAA Atlantic Oceanographic and Meteorological Laboratory https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author Dickson, Andrew G. Scripps Institution of Oceanography https://scripps.ucsd.edu/ HTTPS Scripps Institution of Oceanography (SIO) website Institution web page information author Talley, Lynne D. Scripps Institution of Oceanography https://scripps.ucsd.edu/ HTTPS Scripps Institution of Oceanography (SIO) website Institution web page information author Becker, Susan Scripps Institution of Oceanography https://scripps.ucsd.edu/ HTTPS Scripps Institution of Oceanography (SIO) website Institution web page information author Carlson, Craig A. University of California, Santa Barbara http://www.ucsb.edu HTTP University of California, Santa Barbara (UCSB) website Institution web page information author Warner, Mark J. University of Washington author NOAA National Centers for Environmental Information (NCEI) publisher tableDigital crossReference project eng; USA utf8 environment oceans climatologyMeteorologyAtmosphere -53 115.9 -53.3 -30.382 2023-02-04 2023-09-13 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact 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. Contact NCEI for other distribution options and instructions. Originator data format 6.952 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0287338.html HTTPS Web browser Project Metadata Navigate directly to the URL for a descriptive web page with download links. information https://doi.org/10.25921/3s1w-qn91 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/287338 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/287338 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0225/0287338/ FTP Any FTP client FTP 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). download dataset NCEI Accession 0287338 v1.1 was published. 2024-05-03T22:44:10Z NCEI Accession 0287338 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0287338/1.1 HTTPS NCEI Accession 0287338 v1.1 published 2024-05-03T22:44:10Z download dataset Parameter or Variable: pCO2 (fCO2) autonomous; Abbreviation: fCO2_SW@SST_uatm, dfCO2_uatm; Unit: uatm; Observation type: Surface underway; Measured or calculated: Measured; Calculation method and parameters: Fugacity of CO2 is obtained by correcting the partial pressure of CO2 (pCO2) for non-ideality of the gas with respect to molecular interactions between CO2 and other gases in air. See Pierrot et al. for details on how the correction is made.; Sampling instrument: Seawater pump; Location of seawater intake: Bow; Analyzing instrument: General Oceanics 8050; SIO system ID: D19/24407/199; Detailed sampling and analyzing information: The partial pressure of CO2 (pCO2) in the surface ocean was measured throughout the duration of this expedition with a General Oceanics 8050 underway system. Uncontaminated seawater was continuously passed (~2.7 l/min) through a chamber where the seawater concentration of dissolved CO2 was equilibrated with an overlying headspace gas. The CO2 mole fraction of this headspace gas (xCO2) was measured approximately every three minutes via a non-dispersive infrared analyzer (Licor 7000). Roughly every three hours, the system measured four gas standards with known CO2 concentrations certified by the NOAA Earth Science Research Laboratory in Boulder, CO ranging from ~300 – 900 ppm CO2. Additionally, a tank of 99.9995% ultra-high purity nitrogen gas was measured as a baseline 0% CO2 standard. Following measurements of standard gases, six measurements of atmospheric xCO2 were made of air supplied through tubing fastened to the ships mast. Twice a day, the infrared analyzer was calibrated via a zero and span routine using the nitrogen gas and the highest concentration (818.3 ppm) CO2 standard. In addition to measurements of seawater xCO2, atmospheric xCO2, and standard gases, several variables were monitored to evaluate system performance (e.g. gas and water flow rates, pump speeds, equilibrator pressures, etc; Equilibrator type: Shower head; Equilibrator volume: ~0.5 L; Is the equilibrator vented or not: Vented; Water flow rate: 3 L/min; Gas flow rate: ~0.8 L/m; How was temperature inside the equilibrator measured: Hart Scientific model 1523 digital thermometer, serial number 3491888, with an NIST traceable model 5610 thermistor probe, serial number 18150057. Accurate to ± 0.01°C.; How was pressure inside the equilibrator measured: Setra 239 differential pressure transducer, accurate to ± 0.15 hPa. The equilibrator was passively vented to a secondary equilibrator, and the Licor sample output was vented to the laboratory when CO2 measurements were made, thus equilibrator headspace pressure was assumed to be laboratory pressure.; Drying method for gas: From Pierrot et al.: Sample air is dried in a condenser that is cooled to 4-5 oC by a Peltier thermoelectric device. This partially dried air flushes a chamber that is vented and remains at ambient pressure. The dried air inside the chamber is used as the counter flow in the Nafion® tubing. A vacuum pump pulls the dried air from the chamber first through a fixed restrictor and then through the Nafion® tubes, thus creating an absolute pressure and corresponding partial pressure gradient for water vapor across the membrane. When atmospheric air is measured, some of the partially dried air (80-100 ml/min) is pushed through a Nafion® tube, the analyzer and out a vent instead of flushing the chamber. The headspace gas, when being measured, is circulated in a closed loop through the analyzer at a rate similar to that of the atmospheric air (80-100 ml/min). It is dried first in the condenser, then in a Nafion® tube prior to entering the analyzer and being returned to the equilibrator. Typically, the water mole fraction (xH2O) in the dried gas is about 2 parts per thousand (ppt), which corresponds to a dew point temperature of about -20 °C. The liquid water condensed out of the sample air streams is removed by peristaltic pumps into the vent equilibrator at intervals determined by the user.; SEA CO2 gas detector manufacturer: Licor, Inc; SEA CO2 gas detector model: Licor 7000, IRG4-1354; SEA CO2 gas detector resolution: 0.2 µatm; SEA CO2 gas detector uncertainty: 0.3 µatm for equilibrator measurements, 0.2 µatm for atmospheric measurements; Standardization technique: The system runs a full cycle in approximately six hours. The cycle starts with four standard gases composed of a known quantity of CO2 in air, a gas composed of 100% ultra-high purity nitrogen, then measures six atmopheric samples followed by 60 surface water samples. The gas detector runs a zero and span routine twice daily, using the nitrogen and highest CO2 gas standard, respectively.; Standardization frequency: Every three hours; Standard gas manufacturer: Standard gases are supplied by NOAA’s Earth System Research Laboratory, Global Monitoring Division, in Boulder, CO, and are directly traceable to the WMO scale.; Standard gas concentration: LL55868 = 283.42 ppm CO2, LL127199 = 399.51 ppm CO2, LL127204 = 539.97 ppm CO2, LL127176 = 911.41 ppm CO2; Standard gas uncertainty: 0.01 ppm; Water vapor correction method: Details of the data reduction are described in Pierrot, et.al. (2009).; Temperature correction method: Details of the data reduction are described in Pierrot, et.al. (2009).; At what temperature was pCO2 reported: In situ sea surface temperature; Uncertainty: ± 0.01°C; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Method reference: Pierrot, D.; Neill, C.; Sullivan, K.; Castle, R.; Wanninkhof, R.; Luger, H.; Johannessen, T.; Olsen, A.; Feely, R.A.; and Cosca, C.E. (2009). Recommendations for autonomous underway pCO2 measuring systems and data-reduction routines. Deep-Sea Res., II, v. 56, pp. 512-522.; Researcher name: Collins, A.U.; Researcher institution: Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration Parameter or Variable: Sea Surface Temperature; Abbreviation: SST_C; Unit: Degrees Celsius; Observation type: Surface Underway; Sampling instrument: In-situ observation; Analyzing instrument: Seabird sensors. Details of the data reduction are described in Pierrot, et.al. (2009). Instrumentation is factory calibrated annually.; Uncertainty: 0.0025°C; Quality flag convention: WOCE_QC_FLAG Parameter or Variable: Sea Surface Salinity; Abbreviation: SAL_PSU; Observation type: Surface Underway; Sampling instrument: Uncontaminated seawater supply; Analyzing instrument: Seabird sensors. Details of the data reduction are described in Pierrot, et.al. (2009). Instrumentation is factory calibrated annually.; Uncertainty: 0.005 PSU; Quality flag convention: WOCE_QC_FLAG asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian barometric pressure sensor barometric pressure sensor instrument used to measure the atmospheric pressure. carbon dioxide (CO2) gas analyzer carbon dioxide (CO2) gas analyzer 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. showerhead equilibrator showerhead equilibrator 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. temperature sensor temperature sensor A sensor used to measure temperature. thermosalinograph thermosalinograph automated sea surface temperature and salinity instrument, usually attached to the hull of a ship Thermosalinograph is an automated Sea Surface Temperature and Salinity measurement system making measurement on board a ship using a water intake. [https://www.aoml.noaa.gov/phod/tsg/about.php 2021-01-29] R/V Roger Revelle Flag: United States Type: Research Vessel IMO: 9075228 Company: Scripps Institution of Oceanography DOB: 1996-06 https://scripps.ucsd.edu/ships/revelle