Breadcrumb Home Models Community Earth System Model 2 (CESM2) Prognostic Components Prognostic Components Each model component page contains descriptions and documentation for active or prognostic models. Atmosphere The atmosphere component of the CESM2 is the Community Atmosphere Model (CAM). Land The land component of the CESM2 is the Community Land Model (CLM). Land Ice The land ice component of the CESM2 is the Community Ice Sheet Model (CISM). Ocean The ocean component of the CESM2 is the Parallel Ocean Program version 2 (POP2). River Runoff The river runoff component of the CESM2 is the Model for Scale Adaptive River Transport (MOSART). Sea Ice The sea ice component of the CESM2 is the Community Ice CodE (CICE). Wave The wave component of the CESM2 is WaveWatch III (WW3).