GCAP 2.0: a global 3-D chemical-transport model framework for past, present, and future climate scenarios

Abstract. This paper describes version 2.0 of the Global Change and Air Pollution (GCAP 2.0) model framework, a one-way offline coupling between E2.1 NASA Goddard Institute for Space Studies (GISS) general circulation (GCM) GEOS-Chem global 3-D chemical-transport (CTM). Meteorology driving has been archived from contributions to phase 6 Coupled Model Intercomparison Project (CMIP6) pre-industrial era recent past. In addition, meteorology is available near future end century seven scenarios ranging extreme mitigation warming. Emissions boundary conditions have prepared input that are consistent with CMIP6 experimental design. The meteorology, emissions, transport, chemistry evaluated in past found be largely driven by Modern-Era Retrospective analysis Research Applications 2 (MERRA-2) product observational constraints.