The Task Team on EarthHydroNet (TT-EarthHydroNet) core group provides direction, oversight, and coordination for its three subgroups (Data Policy, GBON Expansion, and Network Design), aligning activities and priorities based on SC-ON guidance. It nominates additional experts, collaborates with the cryosphere community, manages common activities such as reference stations, RRR, outreach, and advocacy, and ensures links with other SC-ON initiatives, including tiered networks, HydroHub/WHOS, and HydroSOS, while liaising with the HCP.