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Diversity of Planetary Atmospheric Circulations and Climates in a Simplified General Circulation Model

Published online by Cambridge University Press:  29 April 2014

Yixiong Wang
Affiliation:
Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, OX1 3PU, Oxford, UK email: y.wang1@physics.ox.ac.uk
Peter Read
Affiliation:
Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, OX1 3PU, Oxford, UK email: p.read1@physics.ox.ac.uk
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Abstract

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The parametric dependence of terrestrial planetary atmospheric circulations and climates on characteristic parameters is studied. A simplified general circulation model—PUMA is employed to investigate the dynamic effects of planetary rotation rate and equator-to-pole temperature difference on the circulation and climate of terrestrial planetary atmospheres. Five different types of circulation regime are identified by mapping the experimental results in a 2-D parameter space defined by thermal Rossby number and frictional Taylor number. The effect of the transfer and redistribution of radiative energy is studied by building up a new two-band semi-gray radiative-convective scheme, which is capable of modelling greenhouse and anti-greenhouse effects while keeping the tunable parameters as few as possible. The results will provide insights into predicting the habitability of terrestrial exoplanets.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2014 

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