ESSDD Earth System Science Data Discussions ESSDD Earth Syst. Sci. Data Discuss. 1866-3591 Göttingen, Germany 10.5194/essd-2026-516 Coastal Ocean Data Analysis Product in North America (Version 2026) Yoo Hyelim 1 2 Jiang Li-Qing https://orcid.org/0000-0003-3311-1658 1 2 3 Langdon Chris https://orcid.org/0009-0000-2353-0942 4 Kozyr Alex 1 2 Alin Simone R. https://orcid.org/0000-0002-8283-1910 5 Hernandez Ayon Jose Martin 6 Azetsu-Scott Kumiko https://orcid.org/0000-0002-1466-6386 7 Barbero Leticia https://orcid.org/0000-0002-8858-5247 8 9 Besemer Nicole 8 Boyd Albert 9 Brodeur Jean R. 10 Cai Wei-Jun https://orcid.org/0000-0003-3606-8325 11 Carter Brendan R. https://orcid.org/0000-0003-2445-0711 5 12 Chapa Cecilia 13 Colbourne Eugene 14 Cross Jessica N. https://orcid.org/0000-0002-6650-9905 5 Enochs Ian 8 Espinosa-Carreon Leticia 15 Feely Richard A. 5 Giesbrecht Karina E. https://orcid.org/0000-0003-2698-3773 16 Gurney-Smith Helen 17 Hales Burke 18 Harada Naomi 19 Hooper James 9 Hunt Christopher W. 20 Ianson Debby https://orcid.org/0000-0001-8317-5196 12 Jankulak Mike 9 Joyce Terrence M. 21 Kennedy Esther G. 22 King Brian A. https://orcid.org/0000-0003-1338-3234 23 Körtzinger Arne https://orcid.org/0000-0002-8181-3593 16 Lankhorst Matthias https://orcid.org/0000-0002-4166-4044 3 Maillet Gary 14 Manzello Derek 24 McLaskey Anna K. 25 39 Menezes Viviane V. https://orcid.org/0000-0002-4885-2056 21 Metzl Nicolas 26 Michel Christine 27 Monacci Natalie M. https://orcid.org/0000-0002-0704-5776 28 Morell Julio M. 29 Murata Akihiko https://orcid.org/0000-0002-5931-2784 30 Newton Jan https://orcid.org/0000-0002-2551-1830 31 O'Grady Emily https://orcid.org/0000-0002-1072-5879 7 Palacio-Castro Ana M. 9 Pierrot Denis https://orcid.org/0000-0002-0374-3825 8 Ringuette Marc 32 Sabine Christopher 33 Salisbury Joseph E. https://orcid.org/0000-0002-5894-6240 20 Sastri Akash R. 12 Schuster Ute 34 Send Uwe 3 Smith Ryan 8 Starr Michel 32 Swift James H. 3 Talley Lynne D. https://orcid.org/0000-0003-1574-729X 3 Thomas Helmuth 35 36 Wallace Douglas W. R. 37 Wang Zhaohui Aleck https://orcid.org/0000-0002-0540-662X 21 Wanninkhof Rik 8 Wong Chi S. 12 Yager Patricia L. 38 Yashayaev Igor https://orcid.org/0000-0002-6976-7803 7 Earth System Science Interdisciplinary Center, University of Maryland, College Park, Maryland 20740, USA National Centers for Environmental Information, National Oceanic and Atmospheric Administration, Silver Spring, Maryland 20910, USA Scripps Institution of Oceanography, University of California San Diego; La Jolla, CA 92093, USA Rosenstiel School of Marine, Atmospheric and Earth Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149, USA Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, 7600 Sand Point Way NE, Seattle, Washington 98115, USA Departamento de Oceanografía Física, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California, Mexico Bedford Institute of Oceanography, Fisheries and Oceans Canada, 155 Challenger Drive, Dartmouth, Nova Scotia, B2Y 4A2, Canada Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, 4301 Rickenbacker Causeway, Miami, Florida 33149, USA Cooperative Institute for Marine and Atmospheric Studies, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149, USA National Oceanic and Atmospheric Administration, 1315 East-West Hwy, Silver Spring, Maryland 20910, USA School of Marine Science and Policy, University of Delaware, 261 S. College Ave, Newark, Delaware 19716, USA Cooperative Institute for Climate, Ocean, and Ecosystem Studies, University of Washington, Seattle, WA, 98195, USA Instituto de Recursos, Universidad del Mar, Puerto Ángel, Oaxaca, Mexico Northwest Atlantic Fisheries Centre, Fisheries and Oceans Canada, 80 East White Hills Road, St. John's, NL A1C 5X1, Canada Instituto Politécnico Nacional. Centro Interdisciplinario de Investigación para el Desarrollo Integral Regionl - Unidad Sinaloa, Bvd. Juan de Dios Bátiz Paredes #250, Col. San Joachin, Guasave, Sinaloa 81101, México School of Earth and Ocean Sciences, University of Victoria, 3800 Finnerty Road, Victoria, BC V8P 5C2, Canada St. Andrews Biological Station, Fisheries and Oceans Canada, 125 Marine Science Drive, St. Andrews, NB E5B 0E4, Canada College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 2651 SW Orchard Avenue, Corvallis, Oregon 97331, USA Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan Ocean Process Analysis Lab, University of New Hampshire, 8 College Rd, Durham, New Hampshire 03824, USA Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, MA 02543, USA Bodega Marine Laboratory, University of California, Davis, 2099 Westside Road, Bodega Bay, CA 94923, USA National Oceanography Centre, European Way, Southampton SO14 3ZH, UK Center for Satellite Applications and Research, National Oceanic and Atmospheric Administration, 5830 University Research Court, College Park, Maryland 20740, USA School of Oceanography, University of Washington, Seattle, Washington 98195, USA Laboratoire LOCEAN/Institut Pierre-Simon Laplace, Sorbonne Université-CNRS-IRD-MNHN, Case 100 - 4 Place Jussieu, 75252 Paris cedex 05, France Freshwater Institute, Fisheries and Oceans Canada, 501 University Crescent, Winnipeg, MB R3T 2N6, Canada Ocean Acidification Research Center, College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, 2150 Koyukuk Drive, Fairbanks, Alaska 99775, USA Department of Marine Sciences, University of Puerto Rico at Mayagüez, Call Box 9000, Mayagüez, PR 00681, USA Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan University of Washington, Applied Physics Lab, NANOOS, & Washington Ocean Acidification Center, 1013 NE 40th St, Seattle, WA, 98105, USA Maurice Lamontagne Institute, Fisheries and Oceans Canada, 850 Route de la Mer, Mont-Joli, QC G5H 3Z4, Canada Department of Oceanography, University of Hawaii at Mānoa, 1000 Pope Rd., Honolulu, Hawaii 96822, USA Department of Geography, Faculty of Environment, Science, Economy, Hatherly Laboratories, Prince of Wales Road, Exeter, United Kingdom Institut für Chemie und Biologie des Meeres (ICBM), Carl von Ossietzky Universität Oldenburg,D-26111 Oldenburg, Germany Institut für Kohlenstoffkreisläufe Helmholtz Zentrum Hereon D-21502 Geesthacht, Germany Department of Oceanography, Dalhousie University, 1355 Oxford Street, P.O. Box 15000, Halifax, NS B3H 4R2, Canada Department of Marine Sciences, University of Georgia, Athens, Georgia 30602, USA current: Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada 24 07 2026 2026 1 20 Copyright: © 2026 Hyelim Yoo et al. 2026 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://essd.copernicus.org/preprints/essd-2026-516/ The full text article is available as a PDF file from https://essd.copernicus.org/preprints/essd-2026-516/essd-2026-516.pdf

The coastal Ocean Data Analysis Product in North America (CODAP-NA, Version 2026) represents a major expansion of coastal ocean carbonate chemistry synthesis for North American continental margins. Compared to CODAP-NA Version 2021, the updated product integrates newly available cruise observations spanning more than four decades, substantially increasing both the spatial and temporal coverage of coastal biogeochemical measurements across North American continental shelves. Observations from multiple research programs have been harmonized into a unified, internally consistent format through standardized quality control procedures, enabling large-scale analyses of ocean carbon cycling and ocean acidification along the North American margins. This version comprises 446 cruises, 31,864 hydrographic profiles, and 195,489 discrete data records covering continental shelf environments from Alaska to Mexico in the west and from Canada to the Caribbean in the east from 1981 to 2024. Fourteen variables (including temperature, salinity, dissolved oxygen, dissolved inorganic carbon, total alkalinity, pH on the Total Scale, carbonate ion, fugacity of carbon dioxide, silicate, phosphate, nitrate, nitrite, nitrate plus nitrite, and ammonium) were subjected to extensive quality control. CODAP-NA Version 2026 is available as a merged data product in CSV, MATLAB, and NetCDF formats (<a href="https://doi.org/10.25921/h2ff-9d66" target="_blank" rel="noopener">https://doi.org/10.25921/h2ff-9d66</a>) through the NOAA Ocean Carbon and Acidification Data System (OCADS: <a href="https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0315529.html" target="_blank" rel="noopener">https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0315529.html</a>). The original cruise data were archived and are accessible via a summary table at the NCEI Ocean Acidification Data Stewardship repository (<a href="https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/synthesis/CODAP-NAv2.html" target="_blank" rel="noopener">https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/synthesis/CODAP-NAv2.html</a>).

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