Abstract: The stellar flux incident on hot Jupiters and hot Neptunes is expected to drive an atmospheric circulation that shapes the day-night temperature difference, infrared light curves, spectra, albedo, and atmospheric composition, and recent Spitzer infrared light curves seem to show evidence for dynamical meteorology in these planets' atmospheres. Here, I will survey basic dynamical ideas and detailed 3D numerical models that illuminate the atmospheric circulation of these exotic planets. I will describe the dynamical mechanisms for pumping and maintaining the fast jets that develop in these models, particularly the broad eastward (superrotating) equatorial jet that seems to be a near-universal feature of 3D models of synchronously rotating hot Jupiters on 2-4 day orbits. The role of friction in affecting the atmospheric circulation, and the conditions that promote time variability, will also be discussed. I will finish by discussing issues relevant to the atmospheric circulation regimes of super Earths, hot Neptunes, and planets on eccentric orbits. Relevant observational implications and tests will be summarized. Where appropriate, connections to giant planets in our Solar System - Jupiter, Saturn, Uranus, and Neptune – will be emphasized, since these planets provide a foundation for our understanding of giant planet circulation generally.

Additional materials: PDF of slides

ExoClimes 2010, Exeter, Wednesday 8^th Sep 2010