gov.noaa.nodc:0298989 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 2026-07-23T13:19:53Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) AOML_ET: Partial pressure of CO2 (pCO2) and sea-air CO2 fluxes for the global ocean, along with the predictor variables from 1998-01-01 to 2023-12-30, using an Extra Trees (extremely randomized trees) machine learning (NCEI Accession 0298989) 2024-11-14 publication 2024-11-21 revision 2024-11-12 creation International DOI Foundation (IDF) 10.25921/0s8y-q287 NOAA National Centers for Environmental Information gov.noaa.nodc:0298989 NCEI Archive Management System 0298989 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 Rik Wanninkhof NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) Rik.Wanninkhof@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information resourceProvider NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information resourceProvider Rik Wanninkhof NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) Rik.Wanninkhof@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information principalInvestigator Joaquin A. Trinanes Fernandez Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) Joaquin.Trinanes@noaa.gov https://cimas.earth.miami.edu/ HTTPS Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) website Institution web page information principalInvestigator Denis Pierrot NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) denis.pierrot@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information principalInvestigator DAVID MUNRO University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences (CIRES) david.munro@colorado.edu https://cires.colorado.edu/ HTTPS University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences (CIRES) website Institution web page information principalInvestigator Colm Sweeney University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences (CIRES) Colm.Sweeney@noaa.gov https://cires.colorado.edu/ HTTPS University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences (CIRES) website Institution web page information principalInvestigator Amanda R. Fay Lamont-Doherty Earth Observatory (LDEO) arfay@wisc.edu http://www.ldeo.columbia.edu/ HTTP Lamont-Doherty Earth Observatory (LDEO) website Institution web page information principalInvestigator 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 Triñanes, Joaquin A. Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies https://cimas.earth.miami.edu/ HTTPS Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) website Institution web page information author Pierrot, Denis 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 Munro, David R. University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences https://cires.colorado.edu/ HTTPS University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences (CIRES) website Institution web page information author Sweeney, Colm University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences https://cires.colorado.edu/ HTTPS University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences (CIRES) website Institution web page information author Fay, Amanda R. Lamont-Doherty Earth Observatory http://www.ldeo.columbia.edu/ HTTP Lamont-Doherty Earth Observatory (LDEO) website Institution web page information author University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences (CIRES) https://cires.colorado.edu/ HTTPS University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences (CIRES) website Institution web page information contributor NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information contributor Lamont-Doherty Earth Observatory (LDEO) http://www.ldeo.columbia.edu/ HTTP Lamont-Doherty Earth Observatory (LDEO) website Institution web page information contributor tableDigital This dataset contains global surface water partial pressure of CO2 data, pCO2w data, and sea-air CO2 fluxes based on the extremely randomized trees or extra trees, ET machine learning approach. The products are labeled as AOML_ET. The outputs are monthly pCO2 and sea-air CO2 flux fields at 1°x1° resolution covering the global ocean from 1998 to 2023. The results of several different permutations of AOML-ET are provided. They all use the following predictor variables at monthly and at 1°x1° resolution. The variables are time, location, sea surface temperature, SST, sea surface salinity, SSS, mixed layer depth, MLD, and chlorophyll-a, chl-a. The training is performed on the v2020 and v2023 releases of the Surface Ocean CO2 Atlas (www.SOCATinfo). The sea-air CO2 fluxes are computed from the air-sea CO2 partial pressure difference, ∆pCO2, and a bulk gas transfer formulation with windspeed. This data holding includes files of the monthly 1°x1° predictor variables. Several AOML_ET products are provided in this accession. SOCATv2020 and SOCATv2023 are used for training; pCO2w and ∆pCO2 are target variables; two different datasets for air CO2 are used for the calculation of sea-air CO2 fluxes, and three different gas exchange parameterizations are applied to determine the sea-air CO2 fluxes. Details are found in the readme file. This dataset is available to the public for a wide variety of uses including scientific research and analysis. Funding Information: NOAA office of Oceanic and Atmospheric Research (GOMO Data management and Synthesis, 100007298) 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 0298989 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:0298989 Preview graphic PNG 0298989 NCEI ACCESSION NUMBER 2024-11-05 publication partial pressure of carbon dioxide - water theme NODC DATA TYPES THESAURUS carbon dioxide (CO2) gas analyzer instrument NODC INSTRUMENT TYPES THESAURUS chemical theme NODC OBSERVATION TYPES THESAURUS Lamont-Doherty Earth Observatory NOAA Atlantic Oceanographic and Meteorological Laboratory University of Colorado Boulder, Cooperative Institute for Research In Environmental Sciences dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Atlantic Oceanographic and Meteorological Laboratory dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ocean Carbon and Acidification Data System (OCADS) project NODC PROJECT NAMES THESAURUS World-Wide Distribution place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication COLUMBIA/LDEO > Lamont-Doherty Earth Observatory, Columbia University DOC/NOAA/OAR/AOML > Atlantic Oceanographic and Meteorological Laboratory, OAR, NOAA, U.S. Department of Commerce UCO/CIRES > Cooperative Institute for Research in Environmental Sciences, University of Colorado 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 Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords The NOAA office of Oceanic and Atmospheric Research is acknowledged for financial support in particular the Global Ocean Monitoring and Observations program (fund reference 100007298) project Research Projects EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE 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 Data Product theme OCADS Study Type pCO2w theme Provider Variable Abbreviations CO2 ANALYZERS > CO2 ANALYZERS 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 GEOGRAPHIC REGION > GLOBAL 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 World-Wide Distribution place Provider Geographic Names accessLevel: public otherRestrictions Cite as: Wanninkhof, Rik; Triñanes, Joaquin A.; Pierrot, Denis; Munro, David R.; Sweeney, Colm; Fay, Amanda R. (2024). AOML_ET: Partial pressure of CO2 (pCO2) and sea-air CO2 fluxes for the global ocean, along with the predictor variables from 1998-01-01 to 2023-12-30, using an Extra Trees (extremely randomized trees) machine learning (NCEI Accession 0298989). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/0s8y-q287. 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. license This dataset has been dedicated to the public domain under the Creative Commons CC0 1.0 Universal (CC0 1.0) Public Domain Dedication. SPDX License: Creative Commons Zero v1.0 Universal (CC0-1.0) DeVries, T., Yamamoto, K., Wanninkhof, R., Gruber, N., Hauck, J., Müller, J. D., Bopp, L., Carroll, D., Carter, B., Chau, T.-T.-T., Doney, S. C., Gehlen, M., Gloege, L., Gregor, L., Henson, S., Kim, J. H., Iida, Y., Ilyina, T., Landschützer, P., et al. (2023). Magnitude, Trends, and Variability of the Global Ocean Carbon Sink From 1985 to 2018. Global Biogeochemical Cycles, 37(10). https://doi.org/10.1029/2023gb007780 2023-10 publication International DOI Foundation (IDF) https://doi.org/10.1029/2023gb007780 https://doi.org/10.1029/2023gb007780 HTTPS https://doi.org/10.1029/2023gb007780 related journal article information DeVries, Tim Department of Geography University of California, Santa Barbara Santa Barbara CA USA author Yamamoto, Kana Earth Research Institute University of California, Santa Barbara Santa Barbara CA USA author Wanninkhof, Rik Atlantic Oceanographic and Meteorological Laboratory National Oceanic and Atmospheric Administration Miami FL USA author Gruber, Nicolas Environmental Physics Institute of Biogeochemistry and Pollutant Dynamics ETH Zurich Zürich Switzerland author Hauck, Judith Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany author Müller, Jens Daniel Environmental Physics Institute of Biogeochemistry and Pollutant Dynamics ETH Zurich Zürich Switzerland author Bopp, Laurent LMD/IPSL Ecole normale supérieure Université PSL CNRS Sorbonne Université Ecole Polytechnique Paris France author Carroll, Dustin Moss Landing Marine Laboratories San José State University Moss Landing CA USA author Carter, Brendan Cooperative Institute for Climate, Ocean, and Ecosystem Studies Seattle WA USA author Chau, Thi‐Tuyet‐Trang Laboratoire des Sciences du Climat et de l’Environnement LSCE/IPSL CEA‐CNRS��UVSQ Université Paris‐Saclay Gif‐sur‐Yvette France author Doney, Scott C. Department of Environmental Sciences University of Virginia Charlottesville VA USA author Gehlen, Marion Laboratoire des Sciences du Climat et de l’Environnement LSCE/IPSL CEA‐CNRS‐UVSQ Université Paris‐Saclay Gif‐sur‐Yvette France author Gloege, Lucas Lamont‐Doherty Earth Observatory Department of Earth and Environmental Sciences Columbia University New York NY USA author Gregor, Luke Environmental Physics Institute of Biogeochemistry and Pollutant Dynamics ETH Zurich Zürich Switzerland author Henson, Stephanie National Oceanography Centre Southampton UK author Kim, Ji Hyun Earth Research Institute University of California, Santa Barbara Santa Barbara CA USA author Iida, Yosuke Atmosphere and Ocean Department Japan Meteorological Agency Minato City Japan author Ilyina, Tatiana Max Planck Institute for Meteorology Hamburg Germany author Landschützer, Peter Max Planck Institute for Meteorology Hamburg Germany author Le Quéré, Corinne School of Environmental Sciences University of East Anglia Norwich UK author Munro, David Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USA author Nissen, Cara Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany author Patara, Lavinia GEOMAR Helmholtz‐Zentrum für Ozeanforschung Kiel Kiel Germany author Pérez, Fiz F. Instituto de Investigaciones Marinas (IIM) CSIC Vigo Spain author Resplandy, Laure Geosciences and High Meadows Environmental Institute Princeton University Princeton NJ USA author Rodgers, Keith B. Center for Climate Physics Institute for Basic Science Busan South Korea author Schwinger, Jörg NORCE Climate & Environment Bjerknes Centre for Climate Research Bergen Norway author Séférian, Roland CNRM Université de Toulouse Météo‐France CNRS Toulouse France author Sicardi, Valentina Barcelona Supercomputing Center Climate Variability and Change Group Barcelona Spain author Terhaar, Jens Department of Marine Chemistry and Geochemistry Woods Hole Oceanographic Institution Woods Hole MA USA author Triñanes, Joaquin Atlantic Oceanographic and Meteorological Laboratory National Oceanic and Atmospheric Administration Miami FL USA author Tsujino, Hiroyuki JMA Meteorological Research Institute Tsukuba Japan author Watson, Andrew Global Systems Institute University of Exeter Norwich UK author Yasunaka, Sayaka Research Institute for Global Change Japan Agency for Marine‐Earth Science and Technology Yokosuka Japan author Zeng, Jiye Earth Systems Division National Institute for Environmental Studies Tsukuba Japan author American Geophysical Union (AGU) publisher documentDigital Global Biogeochemical Cycles 37(10) ISSN 0886-6236, ISSN 1944-9224 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 Müller, J. D. (2023). RECCAP2-ocean data collection [Dataset]. Zenodo. https://doi.org/10.5281/zenodo.7990823 2023 publication International DOI Foundation (IDF) https://doi.org/10.5281/zenodo.7990823 https://doi.org/10.5281/zenodo.7990823 HTTPS https://doi.org/10.5281/zenodo.7990823 related dataset information Müller, Jens Daniel author Zenodo publisher tableDigital 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 Takahashi, T., Sutherland, S. C., Wanninkhof, R., Sweeney, C., Feely, R. A., Chipman, D. W., Hales, B., Friederich, G., Chavez, F., Sabine, C., Watson, A., Bakker, D. C. E., Schuster, U., Metzl, N., Yoshikawa-Inoue, H., Ishii, M., Midorikawa, T., Nojiri, Y., Körtzinger, A., et al. (2009). Climatological mean and decadal change in surface ocean pCO2, and net sea–air CO2 flux over the global oceans. Deep Sea Research Part II: Topical Studies in Oceanography, 56(8-10), 554–577. https://doi.org/10.1016/j.dsr2.2008.12.009 2009-04 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.dsr2.2008.12.009 https://doi.org/10.1016/j.dsr2.2008.12.009 HTTPS https://doi.org/10.1016/j.dsr2.2008.12.009 related journal article information Takahashi, Taro author Sutherland, Stewart C. author Wanninkhof, Rik author Sweeney, Colm author Feely, Richard A. author Chipman, David W. author Hales, Burke author Friederich, Gernot author Chavez, Francisco author Sabine, Christopher author Watson, Andrew author Bakker, Dorothee C.E. author Schuster, Ute author Metzl, Nicolas author Yoshikawa-Inoue, Hisayuki author Ishii, Masao author Midorikawa, Takashi author Nojiri, Yukihiro author Körtzinger, Arne author Steinhoff, Tobias author Hoppema, Mario author Olafsson, Jon author Arnarson, Thorarinn S. author Tilbrook, Bronte author Johannessen, Truls author Olsen, Are author Bellerby, Richard author Wong, C.S. author Delille, Bruno author Bates, N.R. author de Baar, Hein J.W. author Elsevier BV publisher documentDigital Deep Sea Research Part II: Topical Studies in Oceanography 56(8-10) ISSN 0967-0645, pp. 554-577 crossReference project Wanninkhof, R. (2014). Relationship between wind speed and gas exchange over the ocean revisited. Limnology and Oceanography: Methods, 12(6), 351–362. https://doi.org/10.4319/lom.2014.12.351 2014-06 publication International DOI Foundation (IDF) https://doi.org/10.4319/lom.2014.12.351 https://doi.org/10.4319/lom.2014.12.351 HTTPS https://doi.org/10.4319/lom.2014.12.351 related journal article information Wanninkhof, Rik author Wiley publisher documentDigital Limnology & Ocean Methods 12(6) ISSN 1541-5856, ISSN 1541-5856, pp. 351-362 crossReference project An observation-based global monthly gridded sea surface pCO2 and air-sea CO2 flux product from 1982 onward and its monthly climatology (NCEI Accession 0160558) 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/SPCO2_1982_present_ETH_SOM_FFN.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/SPCO2_1982_present_ETH_SOM_FFN.html Related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project Decadal Trends in the Oceanic Storage of Anthropogenic Carbon from 1994 to 2014 (NCEI Accession 0279447) 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/ndp_111/ndp111.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/ndp_111/ndp111.html Related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project eng; USA utf8 environment oceans -180 180 -70 78 1998-01-01 2023-12-30 This data package (Submission ID: BHW55SSFE) was acquired by NCEI from the Scientific Data Integration System (SDIS) at the NOAA Pacific Marine Environmental Laboratory (PMEL) in accordance with the archival submission agreement between NCEI and PMEL. 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 1819.432 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0298989.html HTTPS Web browser Project Metadata Navigate directly to the URL for a descriptive web page with download links. information https://doi.org/10.25921/0s8y-q287 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/298989 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/298989 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0235/0298989/ 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 0298989 v1.1 was published. 2024-11-14T20:34:38Z NCEI Accession 0298989 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0298989/1.1 HTTPS NCEI Accession 0298989 v1.1 published 2024-11-14T20:34:38Z download NCEI Accession 0298989 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. 2024-11-21T20:09:53Z NCEI Accession 0298989 v2.2 publication https://www.ncei.noaa.gov/archive/accession/0298989/2.2 HTTPS NCEI Accession 0298989 v2.2 published 2024-11-21T20:09:53Z download dataset Parameter or Variable: partial pressure of CO2 in surface water; Abbreviation: pCO2w; Unit: microatm; Observation type: derived; Sampling instrument: computer; Detailed sampling and analyzing information: See tAble Readme asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian 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.