ALL versions of GCAS have a suspected issue but are included in distributed data. These submissions are excluded from the computed ensemble mean.

GCAS has a negative bias at the South Pole of a half to a full ppm, for all cases. Also, for the IS case, the bias with respect to AToM plus generally high RMS errors wrt the in situ data for the IS and LNLG experiments. Also there is a time-varying misfit in the global land+ocean flux that doesn't agree with the rest of the groups'.

ObsPack Cosamples
IS,LNLG,LNLGIS,LNLGOGIS,unopt updated 2026-03-25 01:44:08 UTC
v1r1 prior to above date

Fluxes
IS,LNLG,LNLGIS,LNLGOGIS,Prior updated 2026-03-26 06:45:22 UTC
v1r1 prior to above date

TCCON samples
IS,LNLG,LNLGIS,LNLGOGIS updated 2026-03-25 02:08:54 UTC
v1r1 prior to above date

OCO2
IS,LNLG,LNLGIS,LNLGOGIS updated 2026-03-25 01:40:42 UTC
v1r1 prior to above date

OCO3
IS,LNLG,LNLGIS,LNLGOGIS updated 2026-03-24 01:34:07 UTC
v1r1 prior to above date