This WP will improve the terrestrial components of the project ESMs. Developments will focus on coupling of two major terrestrial biogeochemical cycles, carbon and nitrogen, improvement of newly implemented modules of wetlands and methane (CH4) emissions and on improved representation of land cover and land use change in ESMs. The WP is linked to the WP4, which will perform process-level evaluation of offline simulations of the terrestrial ESM components.
The WP contributes to three series of CMIP6 terrestrial intercomparison exercises: C4MIP for biogeochemical cycles, LUMIP for land use and land change interactions and LS3MIP, which studies surface biophysical and hydrological processes. Working with C4MIP, LS3MIP will also consider surface biophysical-biogeochemical interactions, while in collaboration with LUMIP interactions between surface biophysics, biogeochemistry and land use change will be addressed.