Atmospheric Circulation on GJ1214b: Dependence on composition and metallicity

Computer Science

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The detection and characterization of exoplanets continues to be a burgeoning field of research, with the detection of Earth-sized exoplanets already being made by space-based and ground-based efforts (e.g. HARPS, Kepler, ESA's CoRoT, MEarth). The detection of super Earth GJ 1214b by the MEarth survey opened up a new door to characterizing a growing class of planets and their atmospheres. The atmospheric circulation of such an object-transitional between gas giants and terrestrial planets-is a fascinating problem with important implications for observables, yet almost no studies of the atmospheric circulation of super Earths have yet been performed. Therefore, we present three-dimensional atmospheric circulation models of GJ1214b using the SPARC/MITgcm, a general circulation model coupled to a plane-parallel, twostream, multi-band radiative transfer model. Here, we determine the effects of metallicity and atmospheric composition on the circulation and vertical temperature structure of the atmosphere.

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