The collaboration with NOCOS DT centres on sea-ice modelling and cryosphere dynamics, where scientific interoperability and shared datasets are critical. TerraDT and NOCOS DT co-organised the Digital Twin Solutions for Sea Ice workshop, creating a dedicated forum for experts to discuss km-scale modelling, validation strategies and integration pathways into larger digital twin infrastructures. This synergy reinforces consistency in sea-ice representation and promotes coordinated scientific progress across initiatives.