Proposal for international agreement on Ca notation resulting from discussions at workshops on stable isotope measurements held in Davos (Goldschmidt 2002) and Nice (EGS-AGU-EUG 2003)

A proposal is made to standardise the reporting of Ca isotope data to the delta(44)Ca/Ca-40 notation (or delta(44)Ca/Ca-42) and to adopt NIST SIRM 915a as the reference standard.