Plain Language Summary:

The land surface model of the Chinese Academy of Sciences (CAS-LSM), which includes lateral flow, water use, nitrogen discharge and river transport, soil freeze thaw front dynamics, and urban planning, was implemented into the Flexible Global Ocean-Atmosphere-Land System model grid-point version 3 (CAS-FGOALS-g3). Simulations conducted using the updated model showed reasonable distributions in the land surface variables when compared against observations. The new capabilities of the model with the implementation of the CAS-LSM were also assessed. The results suggest that the model is a potentially useful tool for studying the effects of land-surface processes on the global climate, especially those influenced by human interventions.