2467849 CCO2 CO2 content 7 2467848 CCO2 CO2 concentration 6 2467854 CCO2 consumption-based CO2 3 2467851 CCO2 calculated from PCO2 by the equation: In 1 2467852 CCO2 carbonate and total CO2 1 2467853 CCO2 concentration of CO2 1 2467850 CCO2 content of CO2 1