Results from simulations with the coarse-resolution version of MPI-ESM performed by the RETRO team at DKRZ. The left side shows a normal (prograde) rotating earth. The right side shows a backwards (retrograde) rotating earth. The simulations are forced with pre-industrial boundary conditions. For the full description see the Earth System Dynamics manuscript "The climate of a retrograde rotating earth". In the retrograde simulation, the fastest currents can be observed at the American West Coast and in the Indian sector of the Antarctic Circumpolar Current. The North Atlantic Current has vanished, and only a weak boundary current at the African West coast moves water northward in the Atlantic. In the tropics, strong wave-features can be observed.