gov.noaa.nodc:0223522 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 2026-07-17T13:09:41Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Surface underway measurements of partial pressure of carbon dioxide (pCO2) in the water and atmosphere, sea surface salinity, sea surface temperature and barometric pressure during R/V Xue Long CHINARE2018 Expedition (EXPOCODE 76XL20180723) in the Sea of Okhotsk, Japan Sea, North Pacific Ocean, Bering Sea, Chukchi Sea and Arctic Ocean from 2018-07-23 to 2018-09-04 (NCEI Accession 0223522) 2020-12-24 publication 2021-05-20 revision 2020-12-23 creation International DOI Foundation (IDF) 10.25921/pds7-td05 NOAA National Centers for Environmental Information gov.noaa.nodc:0223522 NCEI Archive Management System 0223522 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 Di Qi State Oceanic Administration, Third Institute of Oceanography qidi@tio.org.cn http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information resourceProvider State Oceanic Administration, Third Institute of Oceanography http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information resourceProvider Di Qi State Oceanic Administration, Third Institute of Oceanography qidi@tio.org.cn http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information principalInvestigator Liqi Chen State Oceanic Administration, Third Institute of Oceanography chenliqi@jmu.edu.cn http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information principalInvestigator Zhongyong Gao State Oceanic Administration, Third Institute of Oceanography http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information principalInvestigator Heng Sun State Oceanic Administration, Third Institute of Oceanography http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information principalInvestigator Wei-Jun Cai University of Delaware wcai@udel.edu http://www.udel.edu/ HTTP University of Delaware website Institution web page information principalInvestigator Qi, Di State Oceanic Administration, Third Institute of Oceanography qidi@tio.org.cn http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information author Chen, Liqi State Oceanic Administration, Third Institute of Oceanography chenliqi@jmu.edu.cn http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information author Gao, Zhongyong State Oceanic Administration, Third Institute of Oceanography http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information author Sun, Heng State Oceanic Administration, Third Institute of Oceanography http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information author Cai, Wei-Jun University of Delaware http://www.udel.edu/ HTTP University of Delaware website Institution web page information author State Oceanic Administration, Third Institute of Oceanography http://www.tio.org.cn/ HTTP State Oceanic Administration, Third Institute of Oceanography website Institution web page information contributor tableDigital This dataset includes surface underway chemical, physical and meteorological measurements during R/V Xue Long CHINARE2018 Expedition (EXPOCODE 76XL20180723) in the Sea of Okhotsk, Japan Sea, North Pacific Ocean, Bering Sea, Chukchi Sea and Arctic Ocean from 2018-07-23 to 2018-09-04. These data include measurements of Mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature, in parts per million, mole fraction of CO2 measured in dry outside air, barometric pressure in the equilibrator headspace, barometric pressure, corrected to sea level, water temperature in equilibrator, sea surface temperature, sea surface salinity, fugacity of CO2 in sea water at SST and 100% humidity, and difference between sea water fCO2 and interpolated air fCO2. The instruments used to collect these data include carbon dioxide (CO2) gas analyzer and shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement. The major objectives of this project is to provide a high quality carbon related and other measurements in the Arctic Ocean Funding Information: Ministry of Natural Resources, China 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 NCEI Accession 0223522 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made. https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0223522 Preview graphic PNG 0223522 NCEI ACCESSION NUMBER 2020-12-16 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 XUE LONG platform NODC PLATFORM NAMES THESAURUS State Oceanic Administration, Third Institute of Oceanography dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS State Oceanic Administration, Third Institute of Oceanography dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ship of Opportunity Programme (SOOP) Surface Ocean CO2 Atlas (SOCAT) project NODC PROJECT NAMES THESAURUS Arctic Ocean Bering Sea Chukchi Sea Japan Sea North Pacific Ocean Sea of Okhotsk place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication CHINARE2018 project Cruise ID 76XL20180723 project EXPOCODE Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords CHINARE project Reference Section ID CHINARE2018 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 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 PRES_ATM@SSP_hPa SAL_permil SST_C fCO2_SW@SST 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 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 OCEAN > ARCTIC OCEAN OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > SEA OF JAPAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > SEA OF OKHOTSK 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 Arctic Ocean Bering Sea Chukchi Sea Japan Sea North Pacific Ocean Sea of Okhotsk place Provider Geographic Names accessLevel: public otherRestrictions Cite as: Qi, Di; Chen, Liqi; Gao, Zhongyong; Sun, Heng; Cai, Wei-Jun (2020). Surface underway measurements of partial pressure of carbon dioxide (pCO2) in the water and atmosphere, sea surface salinity, sea surface temperature and barometric pressure during R/V Xue Long CHINARE2018 Expedition (EXPOCODE 76XL20180723) in the Sea of Okhotsk, Japan Sea, North Pacific Ocean, Bering Sea, Chukchi Sea and Arctic Ocean from 2018-07-23 to 2018-09-04 (NCEI Accession 0223522). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/pds7-td05. 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. Di Qi, Liqi Chen, Zhongyong Gao, Heng Sun, Wei-Jun Cai. Ocean Surface Water Partial Pressure of CO2 database: Measurements Performed during the Ninth Chinese Arctic Research Expedition (CHINARE) (2018). Chinese National Arctic and Antarctic Data Center, 2020. https://doi.org/10.11856/nns.d.2020.010.v0. 2018 publication International DOI Foundation (IDF) https://doi.org/10.11856/nns.d.2020.010.v0 https://doi.org/10.11856/nns.d.2020.010.v0 HTTPS https://doi.org/10.11856/nns.d.2020.010.v0 Related resource information crossReference project R/V Xue Long Expeditions Underway Data 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/VOS_Program/Xuelong.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/VOS_Program/Xuelong.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 84.72 -150.15 42.489 84.72 2018-07-23 2018-09-03 In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number. 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 4.12 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0223522.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/pds7-td05 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/223522 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/223522 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0165/0223522/ 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 0223522 v1.1 was published. 2020-12-24T11:41:05Z NCEI Accession 0223522 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0223522/1.1 HTTPS NCEI Accession 0223522 v1.1 published 2020-12-24T11:41:05Z download NCEI Accession 0223522 was revised and v2.2 was published. Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. 2021-05-20T22:53:57Z NCEI Accession 0223522 v2.2 publication https://www.ncei.noaa.gov/archive/accession/0223522/2.2 HTTPS NCEI Accession 0223522 v2.2 published 2021-05-20T22:53:57Z download dataset Parameter or Variable: pCO2 (fCO2) autonomous; Abbreviation: fCO2_SW@SST; Unit: uatm; Observation type: Surface underway; Measured or calculated: Measured; Sampling instrument: Seawater pump; Location of seawater intake: Bow; Analyzing instrument: Non-dispersive infrared detector (Licor-7000); Detailed sampling and analyzing information: The mole fraction of CO2 in the headspace gas is measured using a non-dispersive infrared (NDIR) analyzer (LI-7000 from LICOR); Equilibrator type: Sprayhead above dynamic pool, no thermal jacket; Equilibrator volume: 0.95 (0.4 L water, 0.5 L headspace); Is the equilibrator vented or not: Vented; Water flow rate: 2.0 L/min; Gas flow rate: 0.1 L/min; How was temperature inside the equilibrator measured: Hart Scientific model 1523 digital thermometer; How was pressure inside the equilibrator measured: External Setra 270 connected to the exit of the analyzer; Drying method for gas: Gas stream passes through a thermoelectric condenser (~5 C) and then through a Perma Pure (Nafion) dryer before reaching the analyzer (90% dry).; SEA CO2 gas detector resolution: 0.01 uatm; SEA CO2 gas detector uncertainty: 1%; Standardization technique: The analyzer is calibrated every 4.3 hours with field standards that in turn were calibrated with primary standards that are directly traceable to the WMO scale. The zero gas is ultra-high purity air.; Standardization frequency: Every 4.3 hours; Standard gas manufacturer:; Standard gas concentration: CO2: 88.82 ppm, 188.36 ppm, 528.92 ppm; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Di Qi; Researcher institution: Third Institute of Oceanography Parameter or Variable: Sea Surface Temperature; Abbreviation: SST_C; Unit: degrees celcius; Observation type: Surface Underway; Analyzing instrument: SBE 38, Seabird, Inc.; Detailed sampling and analyzing information: After sea water pump, ~3 m below sea surface; Uncertainty: Accuracy: 0.001C, Precision: 0.0003C; Researcher name: Wei-Jun Cai; Researcher institution: University of Georgia Parameter or Variable: Sea Surface Salinity; Abbreviation: SAL_permil; Observation type: Surface Underway; Analyzing instrument: SBE 45, Seabird, Inc.; Uncertainty: Accuracy: +/- 0.005; Precision: 0.0002; Researcher name: Wei-Jun Cai; Researcher institution: University of Georgia Parameter or Variable: Atmospheric Pressure; Abbreviation: PRES_ATM@SSP_hPa; Unit: hPa; Analyzing instrument: Vaisala, Model: PTB220; Uncertainty: Accuracy: +/- 0.15 hPa; Precision: 0.01 hPa; Researcher name: Wei-Jun Cai; Researcher institution: University of Georgia 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. XUE LONG R/V icebreaker, IMO 8877899, Owner: Polar Research Institute of China, Overall length (meters): 167.0(m) https://en.pric.org.cn/index.php?c=category&id=90 Additional equipment: Dolphin helicopter Overall length (meters): 11.44 Registration no.: B-7102 Call sign: 7102