Global stable and isotope carbon monoxide (CO) concentrations for preindustrial conditions, 1850

This is a global 3-dimensional dataset of carbon monoxide (CO) concentrations, both stable ( 12 C 16 O) and its isotopes ( 12 C 18 O, 12 C 17 O, and 13 C 16 O) as calculated by the Goddard Institute for Space Studies (GISS) ModelE Earth system model. The concentrations are calculated based on a yield approach from emissions and chemical sources, and are representative for the preindustrial atmosphere (1850 conditions). The isotopic signatures and yields from sources like fossil fuel, biomass burning, methane and non-methane hydrocarbons oxidation, and the terrestrial and oceanic biospheres, used come from Park et al. (2013; 2015), and (Duncan et al., 2007) and are applied to the default chemical mechanism of the model (Shindell et al., 2001; 2003), in order to calculate the isotopically-labeled CO concentrations. The loss of CO by OH oxidation is also taken into account, using the isotopic signatures from either (Feilberg et al., 2005) or (Gromov et al., 2010), based on a very flexible mechanism switch implemented in the model.