A community discussion around CO2-in-seawater certified reference materials (CRMs) (text & video)

OA Week 2021, A Community Discussion Around CO2-in-Seawater Certified Reference Materials (CRMs)

Dr. Michael Acquafredda, Ms. Courtney Cochran, Dr. Shallin Busch, & Dr. Libby Jewett, NOAA, USA

Dr. Regina Easley, National Institute of Standards and Technology (NIST), USA

Dr. Andrew Dickson, Scripps Institution of Oceanography, USA

Dr. Maribel Garcia Ibanez, University of East Anglia, UK

Dr. Maciej Telszewski, International Ocean Carbon Coordination Project (IOCCP), Poland

Dr. Peter Swarzenski, & Ms. Ashley Bantelman, International Atomic Energy Agency OA-ICC, Monaco

Dr. Tobias Steinhoff, Dr. Elaine McDonagh, & Dr. Richard Sanders, Norwegian Research Center (NORCE), Norway

Dr. Kim Currie, National Institute of Water and Atmospheric Research (NIWA), New Zealand


Reference materials (RMs) are fundamental for accurate and precise measurements of seawater CO2 system parameters and research related to ocean acidification and oceanic carbon cycles. Currently, there is a single source of RMs for total alkalinity, dissolved inorganic carbon, and pH in seawater and a calibrated HCl titrant for seawater alkalinity analysis (Dickson Laboratory, Scripps Institution of Oceanography). However, the US Interagency Working Group on Ocean Acidification (US IWG-OA) and various international organizations are working to increase the resilience of production and distribution of CO2-in-seawater RMs. In this community discussion session, participants will receive status updates from American & European. Additionally, the US IWG-OA will share its findings from the “CO2-in seawater Reference Materials Community Survey” that was distributed earlier this year. There will be an extended Question & Answer panel discussion, and audience members will be given ample time to ask questions and share their thoughts.

Ocean Acidification Week 2021 was sponsored by the following organizations:

(1) GOA-ON, the Global Ocean Acidification Observing Network,

(2) NOAA, the United States National Oceanic & Atmospheric Administration,

(3) IAEA OA-ICC, the International Atomic Energy Agency – Ocean Acidification International Coordination Centre, and

(4) IOC-UNESCO – the Intergovernmental Oceanographic Commission of the United Nations Educational, Scientific and Cultural Organization

For more information, please visit www.goa-on.org.

GOA-ON, YouTube, 4 October 2021. Text and video.

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