The DYAMOND simulation (aka GEOS/ECCO C1440-LLC2160) is a very high resolution coupled ocean-atmosphere run. It uses the MITgcm ocean model (2–4 km grid, 90 levels) and the NASA Goddard Earth Observing System (GEOS) atmosphere model (7 km grid, 72 levels). The simulation lasts 14 months starting 20Jan20.
For access instructions, see here. And for the paper describing the simulation, see here.