The ICON-Land framework is the land component of the ICON-ESM Earth System Model providing the surface boundary conditions for the atmosphere. As a framework, it was designed specifically for the flexible and user-friendly integration of alternative process and surface descriptions in different experiment configurations, coupled to the atmosphere or offline as Dynamic Global Vegetation Model. JSBACH is one particular implementation containing, in addition to the physical processes, also descriptions of biogeographical and biogeochemical processes. TERRA is a second land model that contains the physical land surface and soil processes and which is used with ICON-NWP for Numerical Weather Prediction and in the COSMO activities.

In this presentation, the design and programming infrastructure of the ICON-Land framework are outlined and the processes and configurations that are implemented in JSBACH are presented. Current work and plans of the ongoing ICON-Seamless projectare then discussed. The goal of ICON-Seamless is to use ICON-Land as the platform to integrate the two different land models JSBACH and TERRA, as well as the two atmospheric physics packages ICON-ESM and ICON-NWP and their coupling to the land (including ICON-ART), into one "seamless" model that can be used by different communities for (global) Earth System Modeling, (regional) Numerical Weather Prediction, seasonal prediction, or ecosystem modeling over a spectrum of spatial and temporal scales.