BIPM-WMO Metrology for climate action 2022, September 2022 [Hibrid Oral-Poster; online].Peer reviewe

Cochran, C.

Currie, K.

Easley, R.

García-Ibáñez, Maribel I.

Hassoun, A.E.R..

Jewett, E.B.

Ma, J.

Palacz, A.P.

Park, K.

Steinhoff, T.

Telszewski, M.

Tilbrook, B.

Easley, Regina

Digital.CSIC

Disclaimer:  Certain commercial equipment, instruments, or materials are identified in this poster to specify adequately the experimental procedure.  Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the materials or equipment identified are necessarily the best available for the purpose.AbstractTowards a robust and sustained production and global supply of reference materials for the seawater carbonate systemMaribel I. García-Ibáñez, Regina Easley, Artur P. Palacz, Courtney Cochran, Kim Currie, Abed El Rahman Hassoun, Elizabeth B. Jewett, Jian Ma, Keyhong Park, Tobias Steinhoff, Maciej Telszewski, Bronte TilbrookBiogeochemistry Panel A robust and sustained production and global supply of certified reference materials (CRMs) for theseawater carbonate system is critical for ocean carbon research and climate science. The availability andconsistent use of CRMs over the past decades have enabled comparable measurements of seawater totalalkalinity, dissolved inorganic carbon, and pH with known quality, which underpin our ability to assesschanges in the ocean carbon cycle and trends of ocean acidification. The COVID-19 pandemic highlightedthe fragility of the current global production and supply system of primary CRMs, which is dependent onone unique lab at the Scripps Institution of Oceanography, USA. The dramatic reduction in CRM supplyfrom the USA forced many research laboratories to produce secondary (in-house) standards, a challengingtask since there are no standard protocols for their production, thus resulting in non-uniform productionand compliance measures. Given the current inability to produce the CRMs elsewhere, a more robustdistribution and production scheme has been proposed by the international community of ocean carbonresearchers, supported by the International Ocean Carbon Coordination Project (IOCCP), the U.S.Interagency Working Group on Ocean Acidification, and the Integrated Carbon Observation System - OceanThematic Centre (ICOS-OTC) among others. A proposed solution to create a more resilient production ofCRMs is the production of primary CRMs in an accredited lab and of secondary reference materials(ultimately dependent on the values of the primary reference materials - CRMs) among regional hubsdistributed across multiple continents. Reduced costs (e.g. of shipping) and greater production capacityenabled by regional hubs would ensure consistent use of RMs by the rapidly growing ocean acidificationand ocean carbon dioxide removal communities. The ultimate goal for a resilient CRM production wouldbe to reduce the reliance on just one lab producing CRMs. The successful use of RMs by the oceanobserving community depends on the robustness of the production system. To this end, there is a need todevelop Standard Operating Procedures (SOPs) for producing secondary reference materials for theseawater carbonate system which include guidance on establishing traceability using primary CRMs andconstructing the total uncertainty budget with consideration of batch homogeneity and stability. Closecollaborations with national metrology labs across the globe are indispensable in this process.Seawater carbonate system RMs are critical for ocean carbonscience & policyThe availability and consistent use of seawater reference materials with assigned values for total dissolvedinorganic carbon and total alkalinity over the past three decades have enabled comparable measurements ofseawater total alkalinity, total dissolved inorganic carbon, and pH with known quality for millions of measurestaken by hundreds of scientists underpinning our ability to assess changes in the ocean carbon cycle and quantifytrends in ocean acidification.Global access to seawater carbon RMs is vulnerableA single production and supply centre at Scripps Institution of Oceanography (USA) provides RM’s and other reagents needed for ocean carbon measurements:● Total alkalinity (TA)● Total dissolved inorganic carbon (DIC)● Tris buffer for pH● Standardized HCl (for TA titrations)YET . . . https://www.science.org/content/article/world-s-only-source-critical-seawater-samples-could-dryPossible structure of a global ocean carbon RM systemLocal hubs could significantly decrease costs for logistics and distribution.Achieving a robust and sustained production and global supply of Certified Reference Materials (CRMs) for the seawater carbonate system is critical for the sustainability and reliability of both the ocean carbon research and climate science.NEXT STEPS❑ Drafting a position paper to promote the vision for a global distributed system for production and supply of seawater CRMs.❑ Establishing common procedures and best practices for quantifying uncertainty in secondary RMs.Role of national metrology labs and expert labs

Towards a robust and sustained production and global supply of certified reference materials for the seawater carbonate system

https://digital.csic.es/bitstream/10261/353840/1/IOCCP%20Poster%20-%20BIPM%20WMO.pdf

Towards a robust and sustained production and global supply of certified reference materials for the seawater carbonate system

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