Coupling Planet Simulator Mars, a general circulation model of the Martian atmosphere, to the ice sheet model SICOPOLISO. J. STENZEL, B. GRIEGER, H. U. KELLER, R. GREVE, K. FRAEDRICH, E. KIRK and F. LUNKEIT AbstractA general circulation model of the Martian Atmosphere is coupled with a 3-dimensional polythermal ice-sheet model of the polar ice caps. With this combination a series of experiments is carried out to investigate the impact of long term obliquity change on the Martian north polar ice cap (NPC). The behaviour of the NPC is tested under obliquities of theta = 15°, 25° and 35°. With increasing obliquity the area covered by the NPC gets smaller but does not vanish. However, when started from an ice free condition the models develop an ice cap only for low obliquities. The "critical" obliquity at which a build up of a new polar cap is possible is theta = 22°. Planetary and Space Science 55 (14), 2087-2096 (2007). |
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