. Fig, Net gain of surface ice over a year (mm yr ?1 ) for each sensitivity experiment. Details can be

. Fig, Net ice accumulation (mm yr ?1 ) predicted in simulation x 7 = (35 ? ,0.1,90 ? ,2.5,TMG), superposed on the map by Squyres LDA and LVF stand for Lobate Debris Aprons and Lineated Valley Fill, 1979.