[MIS18-P05] How does the Land-Ocean distribution affect atmospheric circulation on the planet? Evidence from eolian dune records on Earth, Mars, and Titan
Keywords:Eolian dune, Land-Ocean distribution, Atmospheric circulation, Supercontinent
As a result, we find marked relationships between Land-Ocean distribution and atmospheric circulation pattern as follows. In the Ocean Planet-type with dispersed continents (e.g., present Earth), zonal and symmetrical atmospheric circulation pattern is developed because interhemispheric temperature gradient is relatively small. On the other hand, cross-equatorial and asymmetrical atmospheric circulation is gradually dominant in response to the increase in Land area distribution, such as Ocean Planet-type with aggregated continents (e.g. Pangaean Earth), Lake Planet-type (e.g. Titan), and Land Planet-type (e.g. present Mars). However, we also noted the exceptions of the predominance of cross-equatorial and asymmetrical monsoonal circulation in Ocean Planet-type with aggregated continents in one side of the hemisphere (e.g. Rodinian Earth and past Mars).