Review of the global models used within phase 1 of the Chemistry–Climate Model Initiative (CCMI)

Geoscientific Model Development (2017)

We present an overview of chemistry–climate and chemistry transport models used within phase 1 of the Chemistry–Climate Model Initiative (CCMI-1).

The CCMI aims to conduct a detailed evaluation of participating models using process-oriented diagnostics derived from observations in order to gain confidence in the models’ projections of different climate factors and the interactions between them. Interpreting these requires detailed knowledge of the radiative, chemical, dynamical, and physical processes incorporated in the models.

Understanding the degree to which CCMI-1 recommendations for simulations have been followed is also necessary to understand model responses to anthropogenic and natural forcing, and to explain inter-model differences.