GEOS-Chem Adjoint

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Adjoint Model Branches

There are currently three main branches of the GEOS-Chem adjoint model.

  • GEOS-Chem v6-02-05, full chemistry with online aerosols
  • GEOS-Chem v6/v7, tagged CO/CO2
  • GEOS-Chem v7, full chemistry

GEOS-Chem v6-02-05, full chemistry with online aerosols


  • GEOS-3
  • 4x5
  • Several Observational Operators
    • IMPROVE PM2.5 (NO3, SO4, OC, BC)
    • CASTNet (NH4+)
    • GOME / SCIAMACHY NO2 column using KNMI retrieval

Primary Developer

Daven Henze

GEOS-Chem v6/v7, tagged CO/CO2


Primary Developer

Monika Kopacz

GEOS-Chem v7, full chemistry


Primary Developer

Kumaresh Singh

GEOS-Chem Adjoint Publications

  • Kopacz, M., D. J. Jacob, D. K. Henze, C. L. Heald, D. G. Streets, and Q. Zhang (2008), A comparison of analytical and adjoint Bayesian inversion methods for constraining Asian sources of CO using satellite (MOPITT) measurements of CO columns, J. Geophys. Res., doi:0.1029/2007JD009264.
  • Henze, D. K., A. Hakami and J. H. Seinfeld (2007), Development of the adjoint of GEOS-Chem, Atmos. Chem. Phys., 7, 2413-2433.