The Inter-CSE Transferability Study (ICTS) contributes to transferability studies defined in CEOP (Coordinated Enhanced Observing Period). Several regional atmospheric models are used for simulations in different climate regions. The models are embedded in different global models to evaluate the effects of initial and boundary conditions from the different global models. Detailed information can be found at: http://icts.gkss.de (defunct) http://www.ceop.net (defunct)