Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2011-05-20
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
Accepted by MNRAS. 28 pages, 19 figures. No changes to last version except for title (to adhere to MNRAS guidelines)
Scientific paper
Improving upon our purely dynamical work, we present three-dimensional simulations of the atmospheric circulation on Earth-like (exo)planets and hot Jupiters using the GFDL-Princeton Flexible Modeling System (FMS). As the first steps away from the dynamical benchmarks of Heng, Menou & Phillipps (2011), we add dual-band radiative transfer and dry convective adjustment schemes to our computational setup. Our treatment of radiative transfer assumes stellar irradiation to peak at a wavelength shorter than and distinct from that at which the exoplanet re-emits radiation ("shortwave" versus "longwave"), and also uses a two-stream approximation. Convection is mimicked by adjusting unstable lapse rates to the dry adiabat. The bottom of the atmosphere is bounded by a uniform slab with a finite thermal inertia. For our models of hot Jupiters, we include an analytical formalism for calculating temperature-pressure profiles, in radiative equilibrium, which accounts for the effect of collision-induced absorption via a single parameter. We discuss our results within the context of: the predicted temperature-pressure profiles and the absence/presence of a temperature inversion; the possible maintenance, via atmospheric circulation, of the putative high-altitude, shortwave absorber expected to produce these inversions; the angular/temporal offset of the hot spot from the substellar point, its robustness to our ignorance of hyperviscosity and hence its utility in distinguishing between different hot Jovian atmospheres; and various zonal-mean flow quantities. Our work bridges the gap between three-dimensional simulations which are purely dynamical and those which incorporate multi-band radiative transfer, thus contributing to the construction of a required hierarchy of three-dimensional theoretical models.
Frierson Dargan M. W.
Heng Kevin
Phillipps Peter J.
No associations
LandOfFree
Atmospheric circulation of tidally locked exoplanets: II. Dual-band radiative transfer and convective adjustment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Atmospheric circulation of tidally locked exoplanets: II. Dual-band radiative transfer and convective adjustment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atmospheric circulation of tidally locked exoplanets: II. Dual-band radiative transfer and convective adjustment will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-649236