GEOS-CF USERS:
Important Dates for Transition to CF Version 2:
Monday, Nov. 24, 2025: GEOS-CF version 2 becomes default CF system
Monday, Dec. 1, 2025: GEOS-CF version 1 is deprioritized (replay available, forecast availability contingent on adequate computing resources)
Thursday, Jan. 1, 2026: GEOS-CF version 1 data no longer produced

To stay informed about important changes to GEOS-CF, subscribe to the geos-cf-users mailing list. Either contact Rob.Lucchesi@nasa.gov directly or send an email with 'subscribe' in in the subject to geos-cf-users-join@lists.nasa.gov and follow the instructions to confirm the subscription with a follow-up email. Thank you for your interest in GEOS-CF products.

Surface Maps

Surface concentrations represent the amount of a given constituent at or near the surface. It is typically derived from the lowest model level. Please see the "Total Column" fields to assess the total amount of a given constituent throughout the atmosphere.