Data for Novel field trial for ocean alkalinity enhancement using electrochemically derived aqueous alkalinity from 2024-11-07 to 2025-02-08 (NCEI Accession 0307424)

Description

Ocean alkalinity enhancement is a proposed method of marine carbon dioxide removal that enhances the ocean’s uptake of atmospheric carbon dioxide (CO2) and converts it to dissolved bicarbonate for long-term ocean storage. This method of marine carbon dioxide removal has been gaining attention for its potential to durably (10,000+ years) store large amounts of CO2 (Gt+ where 1 Gt = 1 x 10^9 tons), while potentially ameliorating acidification in the vicinity of the alkalinity release. This study focuses on a novel release of electrochemically derived aqueous alkalinity into Sequim Bay, WA, through a previously established wastewater treatment plant (WWTP). This research was made possible through the collaboration of industry, academic, and federal partners, which enabled the establishment of an Ebb Carbon electrochemical mCDR system at the Pacific Northwest National Laboratory in Sequim, WA, for ocean alkalinity enhancement field trials. During these field trials, pH was measured across the WWTP system from the initial alkalinity dosing, throughout the WWTP, and at the outfall. We use the NBS scale for pH throughout this study as it is the scale used in discharge permit limits specified for WWTP and NPDES regulation and compliance monitoring. The background pHNBS of Sequim Bay seawater was between 7.5 to 7.7 for the November and February field tests. The mixing tank's pHNBS was raised to the maximum value permitted for the WWTP (9.0) and maintained across the system (±0.2) during the outfall releases. At the outfall, the elevated pH and alkalinity was quickly diluted, such that the region with a measurable signal was limited to within ~2.5 m of the discharge pipe. We were able to successfully monitor an increase in pHNBS across all four pulses of alkalinity-enhanced seawater discharge during the February 2025 field trial, with peak pHNBS values of 8.3 or 8.1, as recorded by outfall-adjacent YSI Exo 2 sonde and SAMI-pH sensors, respectively. The alkalinity-enhanced seawater did not measurably alter the surrounding waters' temperature, salinity, turbidity, or oxygen. This study provides proof-of-concept for a conservative small-scale release of electrochemically generated alkalinity-enhanced seawater from a coastal outfall.

Resources

Name Format Description Link
0 Institution web page https://www.pmel.noaa.gov/
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
21 Navigate directly to the URL for a descriptive web page with download links. https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0307424.html
0 Navigate directly to the URL for a descriptive web page with download links. https://doi.org/10.25921/7zf4-3135
0 Navigate directly to the URL for a descriptive web page with download links. https://www.ncei.noaa.gov/archive/accession/oas/307424
0 Navigate directly to the URL for data access and direct download. https://www.ncei.noaa.gov/archive/accession/download/307424
0 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). ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0239/0307424/
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page http://www.pnl.gov/
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0 Institution web page http://www.pnl.gov/
0 Institution web page https://cicoes.uw.edu/
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 related journal article https://doi.org/10.3389/fenve.2025.1641277
0 OCADS website https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
21 Navigate directly to the URL for a descriptive web page with download links. https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0307424.html
0 Navigate directly to the URL for a descriptive web page with download links. https://doi.org/10.25921/7zf4-3135
0 Navigate directly to the URL for a descriptive web page with download links. https://www.ncei.noaa.gov/archive/accession/oas/307424
0 Navigate directly to the URL for data access and direct download. https://www.ncei.noaa.gov/archive/accession/download/307424
0 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). ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0239/0307424/
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 related journal article https://doi.org/10.3389/fenve.2025.1641277
0 OCADS website https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
0 Institution web page http://www.pnl.gov/
0 Institution web page https://cicoes.uw.edu/
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
21 Navigate directly to the URL for a descriptive web page with download links. https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0307424.html
0 Navigate directly to the URL for a descriptive web page with download links. https://doi.org/10.25921/7zf4-3135
0 Navigate directly to the URL for a descriptive web page with download links. https://www.ncei.noaa.gov/archive/accession/oas/307424
0 Navigate directly to the URL for data access and direct download. https://www.ncei.noaa.gov/archive/accession/download/307424
0 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). ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0239/0307424/
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page http://www.pnl.gov/
0 Institution web page https://www.pmel.noaa.gov/
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
0 related journal article https://doi.org/10.3389/fenve.2025.1641277
0 OCADS website https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
0 Institution web page https://cicoes.uw.edu/
0 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 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords

Tags

  • pco2
  • north pacific ocean
  • ta
  • oceanography
  • u.s. west coast
  • field experiment
  • mcdr
  • electrochemical acid sequestration to ease ocean acidification (ease-oa)
  • sequim bay
  • dic
  • ph
  • ocean carbon and acidification data system (ocads) project

Topics

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