The major ion chemistry of seawater was closely coupled to the long-term carbon cycle during the Cenozoic

Proceedings of the National Academy of Sciences, Volume 123, Issue 2, January 2026. <br/>SignificanceDetermining past changes in the composition of seawater is important as seawater chemistry can be thought of as an integrated record of geological processes that drive the carbon cycle. In addition, seawater major ion chemistry data are …