gov.noaa.nodc:0244850 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 2026-03-26T08:04:14Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Partial pressure of carbon dioxide, temperature, salinity and other variables collected from surface underway observations using carbon dioxide (CO2) gas analyzer, shower head chamber equilibrator for autonomous CO2 measurement and other instruments during R/V Ryofu Maru III cruises in the Pacific Ocean in 2021 (NCEI Accession 0244850) 2022-01-06 publication 2022-01-03 creation International DOI Foundation (IDF) 10.25921/9bqr-1r50 NOAA National Centers for Environmental Information gov.noaa.nodc:0244850 NCEI Archive Management System 0244850 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 Koji Kadono Japan Meteorological Agency, Marine Division resourceProvider Japan Meteorological Agency (JMA) resourceProvider Koji Kadono Japan Meteorological Agency, Marine Division seadata@climar.kishou.go.jp principalInvestigator Kazutaka Enyo Japan Meteorological Agency (JMA) seadata@met.kishou.go.jp collaborator Kadono, Koji Japan Meteorological Agency, Marine Division author Enyo, Kazutaka Japan Meteorological Agency (JMA) seadata@met.kishou.go.jp author Japan Meteorological Agency (JMA) contributor tableDigital This dataset includes surface underway data collected from R/V Ryofu Maru III cruises in the Pacific Ocean from 2021-01-13 to 2021-10-11. These data include partial pressure of carbon dioxide in the water, barometric pressure, sea surface salinity and sea surface temperature. The instruments used to collect these data include carbon dioxide (CO2) gas analyzer, shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement. The major objectives of the measurements is to provide a high quality measurements of atmospheric and sea surface fCO2, sea surface salinity, temperature, and other parameters in the North Pacific Ocean. Funding Information: Japan Meteorological Agency (Observation for Monitoring Background Marine Pollution) 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:0244850 Preview graphic PNG 0244850 NCEI ACCESSION NUMBER 2021-12-23 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 salinometer showerhead equilibrator temperature sensor instrument NODC INSTRUMENT TYPES THESAURUS chemical meteorological physical surface underway theme NODC OBSERVATION TYPES THESAURUS Ryofu Maru platform NODC PLATFORM NAMES THESAURUS Japan Meteorological Agency dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS Japan Meteorological Agency dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ship of Opportunity Programme (SOOP) Surface Ocean CO2 Atlas (SOCAT) project NODC PROJECT NAMES THESAURUS East China Sea (Tung Hai) Japan Sea North Pacific Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication JP/JMA > Japan Meteorological Agency, Japan dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 23 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 RF2101M RF2102M RF2103M RF2104M RF2105M RF2106M RF2107M RF2108M project Cruise ID 49UP20210113 49UP20210301 49UP20210407 49UP20210425 49UP20210531 49UP20210719 49UP20210827 49UP20210920 project EXPOCODE Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords SOOP project Reference Section ID Ship Of Opportunity Program (SOOP) project Research Projects 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 23 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 measurement Surface underway theme OCADS Study Type R/V Ryofu Maru III SOOP VOS theme Provider Keywords AtmPrs SSS SST_C xCO2eq theme Provider Variable Abbreviations BAROMETERS > BAROMETERS CO2 ANALYZERS > CO2 ANALYZERS EQUILIBRATORS SALINOMETERS TEMPERATURE SENSORS > TEMPERATURE SENSORS instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 23 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 23 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 Ryofu Maru (call sign: JGQH, ICES code: 49UP, 1995-2024) platform ICES/SeaDataNet Ship Codes OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > SEA OF JAPAN OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > EAST CHINA SEA place Global Change Master Directory (GCMD) Location Keywords 2026 revision 23 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 East China Sea Japan Sea North Pacific Ocean place Provider Geographic Names accessLevel: Public otherRestrictions Cite as: Kadono, Koji; Enyo, Kazutaka (2022). Partial pressure of carbon dioxide, temperature, salinity and other variables collected from surface underway observations using carbon dioxide (CO2) gas analyzer, shower head chamber equilibrator for autonomous CO2 measurement and other instruments during R/V Ryofu Maru III cruises in the Pacific Ocean in 2021 (NCEI Accession 0244850). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/9bqr-1r50. 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. Hirota, M., Nemoto, K., Murata, A., and Fushimi, K. 1991. Observation of carbon dioxide in air and surface seawater in the western North Pacific Ocean. Oceanogr. Mag., 41, 19-28. 1991 publication crossReference project Observation lines of Japan Meteorological Agency 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/VOS_Program/Ryofu_Keifu_Kofu_Maru.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/VOS_Program/Ryofu_Keifu_Kofu_Maru.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 eng; USA utf8 environment oceans climatologyMeteorologyAtmosphere 126.9 179 2.97 42.506 2021-01-13 2021-10-11 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 2.7 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0244850.html HTTPS Web browser Project Metadata Navigate directly to the URL for a descriptive web page with download links. information https://doi.org/10.25921/9bqr-1r50 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/244850 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/244850 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0193/0244850/ 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 0244850 v1.1 was published. 2022-01-06T22:56:39Z NCEI Accession 0244850 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0244850/1.1 HTTPS NCEI Accession 0244850 v1.1 published 2022-01-06T22:56:39Z download dataset Parameter or Variable: pCO2 (fCO2) autonomous; Abbreviation: xCO2eq; Unit: uatm; Observation type: Surface underway; Measured or calculated: Measured; Sampling instrument: Seawater pump; Location of seawater intake: Port sea-chest at the center in the longitudinal direction of a hull; Analyzing instrument: Infra-red analysis on dry gas; Detailed sampling and analyzing information: Infrared analysis of headspace in equilibrium with flowing seawater; Equilibrator type: two stage showerhead; Equilibrator volume: 0.85 (air), 6.5 (seawater); Is the equilibrator vented or not: Vented; Water flow rate: 3 L/min; Gas flow rate: 500 mL/min; How was temperature inside the equilibrator measured: Temperature inside the equilibrator is the seawater temperature at shower head, measured by Platinum RTD sensor, Pt100; How was pressure inside the equilibrator measured: Pressure inside the equilibrator measured by Setraceram Model 270 pressure transducer, Setra Systems, Inc.; Drying method for gas: Thermoelectric cooling units followed by permeable membrane dryer and magnessium perchlorate tube; SEA CO2 gas detector manufacturer: Licor, Inc; SEA CO2 gas detector model: Licor 7000; SEA CO2 gas detector uncertainty: 0.176 micro mol/mol; Standardization frequency: Frequency: Every 1 hour, Scale: WMO X2007 scale; Standard gas manufacturer: Japan Fine Products Co., Ltd. (Japan); Standard gas concentration: 4 cylinders: 280, 350, 410 and 470 micro mol/mol; At what temperature was pCO2 reported: In situ sea surface temperature; Uncertainty: 0.01C; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Method reference: Hirota, M., Nemoto, K., Murata, A., and Fushimi, K. 1991. Observation of carbon dioxide in air and surface seawater in the western North Pacific Ocean. Oceanogr. Mag., 41, 19-28.; Researcher name: Koji Kadono; Researcher institution: Japan Meteorological Agency Parameter or Variable: Sea Surface Temperature; Abbreviation: SST_C; Unit: degrees celcius; Observation type: Surface Underway; Sampling instrument: The seachest located ca.5 m below the sea level; Analyzing instrument: Sea-Bird Electronics, Inc. Model SBE-38; Detailed sampling and analyzing information: NIST-traceable calibration applying over the entire range.; Uncertainty: Resolution: 0.0001 DEG_C; Uncertainty (Accuracy/Precision): 0.001 DEG_C; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Koji Kadono; Researcher institution: Japan Meteorological Agency Parameter or Variable: Sea Surface Salinity; Abbreviation: SSS; Observation type: Surface Underway; Sampling instrument: The seachest located ca.5 m below the sea level; Analyzing instrument: Sea-Bird Electronics, Inc. (Sea Surface Salinity Sensor); Detailed sampling and analyzing information: NIST-traceable calibration applying over the entire range. Last calibrated on 2017/07/12at Sea-Bird Electronics, Inc. Calibrated with salinity measurements at ship using standard weawater provided by Ocean Scientific International Ltd.; Uncertainty: Resolution: 0.0001 mS/cm; Uncertainty (Accuracy/Precision): 0.003 mS/cm; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Koji Kadono; Researcher institution: Japan Meteorological Agency Parameter or Variable: Atmospheric pressure at sea-surface pressure; Abbreviation: AtmPrs; Unit: hPa; Observation type: Surface Underway; Analyzing instrument: Vaisala (Atmospheric Pressure Sensor), Model: BAROCAP(r) Digital Barometer PTB220; Uncertainty: Resolution: 0.01 hPa; Uncertainty (Accuracy/Precision): 0.15 hPa; Researcher name: Koji Kadono; Researcher institution: Japan Meteorological Agency 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. salinometer salinometer generic salinometer use salinometer when the instrument type used is unclear but the data include salinity measurements 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. Ryofu Maru Update information from ICES for the vessel Ryofu Maru from JAPAN. Name Ryofu Maru Country Flag JAPAN (JP) Platform Class 31 Research vessel Call Sign JGQH IMO 9100322 Pennant Title Commissioned Date 1995-06-30 Decommissioned Date Current Length(m) Built Date 1995-06-30 Additional information - http://www.marinetraffic.com/en/ais/details/ships/431757000