As of Jan. 1, 2026, GEOS-CF version 2 is the only available CF product.
Total column fields represent the sum total of a given constituent throughout the atmosphere. It is derived by summing over all model layers from the surface to the top of the atmosphere (this is known as the "column" at a given location). Use these fields to assess the total atmospheric content.
Tropospheric column fields represent the sum of a given constituent from the surface to the tropopause.