We do not plan to publish oxygen related fields from CESM2 on the ESGF. Here is the explanation for this decision:
When the biogeochemical model was initially coupled to the simulated ocean circulation of CESM2 \citep{Danabasoglu_etal_JAMES_2020}, excessively large subsurface oxygen minimum zones (OMZs) developed in the Pacific Ocean. The entire North Pacific deeper than 1000 m was heading towards anoxia, which was leading to excessive denitrification and a subsequent loss of nitrate. The problem has been attributed to weak formation of Antarctic Bottom Water, which is evidenced by simulated natural radiocarbon age in the deep North Pacific being twice that of observations. In order to avoid an unacceptable distribution of oxygen, and the subsequent unrealistic loss of nitrate, we artificially downscale oxygen consumption in the deep Pacific. We implement this by multiplying oxygen consumption by a scale factor that is 0.3 in the deep Pacific. The scale factor is 1.0 outside of the Pacific, and within the Pacific it ramps to 1.0 over $20^\circ$S - $40^\circ$S and also over 1500 m - 750 m. Note that this downscaling of oxygen consumption breaks stoichiometric relationships between oxygen and other biogeochemical tracers, invalidating assumptions commonly made in the analysis of biogeochemical simulations (e.g., computing preformed nutrients). In order to avoid confusion from potential users of CESM2 CMIP6 output, we have opted to withhold publication of oxygen related fields from CESM2 CMIP6 experiments to the ESGF.
