^(13)C^(18)O^(16)O in air

Abstract

The atmospheric budget of CO_2 is constrained by its concentration, δ^(13)C and δ^(18)O. However, these are insufficient to resolve source and sink processes, which vary complexly in flux and/or isotope signature. There are twelve stable isotopologues of CO_2, each of which has unique thermodynamic and kinetic properties and could offer unique constraints on the budget. However, only three are commonly measured (^(12)C^(16)O^(16)O, ^(13)C^(16)O^(16)O, and ^(12)C^(18)O^(16)O); most of the rest have not been previously analyzed in natural materials