ocean.thetao.tavg-ol-hm-sea.mon.glb and ocean.so.tavg-ol-hm-sea.mon.GLB

[YanchunHe]

According to the CMIP7_ocean.json data request table, the global averaged potential temperature and salinity should be provided on averages of each model layer (level).

        "thetao_tavg-ol-hm-sea": {
            "cell_measures": "",
            "cell_methods": "area: mean where sea time: mean",
            "comment": "",
            "dimensions": [
                "olevel",
                "time"
            ],
            "long_name": "Global Average Sea Water Potential Temperature",
            "modeling_realm": "ocean",
            "out_name": "thetao",
            "positive": "",
            "standard_name": "sea_water_potential_temperature",
            "units": "degC"
        }

However, in the data request sheet and in the model output, as I can see, tempga and salnga are provided as purely time-series data of the 3D average.

This is likely wrong model diagnostics, and can be fixed.

[YanchunHe]

conclusion:

We do the level-average during CMORization, by weighting by the masscello, and compared with the model output tempga and salnga.

For sanity checking with tempga, do 3D masscello sum.

[YanchunHe]

update: The olevel is removed in the data request v.1.2.2.4 (released 2026-06-05), so now the dimension is the same as the model output tempga and salnga. No vertical average needed.