1400+
Users
330+
Institutions
39
Countries
25+ years of model development and support of observations
Advanced representation of atmospheric chemistry with 350+ species in gaseous and condensed phases
Fine resolution capabilities |
> GEOS-Chem Classic simulations down to 12 km
|
Powers atmospheric chemistry in Earth System Models including NASA GEOS, NASA GISS, NCAR CESM, and BCC ESM
500+ TB of input data catalog includes NASA GMAO assimilated meteorology and numerous emission inventories
Large and growing impact with 122,000+ citations of GEOS-Chem publications
Includes dedicated tools for data assimilation such as model adjoint, analytical inversion, and Kalman filters
Updated Jan 2026