GCM-Motivated Multidimensional Atmospheric Temperature Parameterization
We present a new GCM-motivated multidimensional temperature parameterization of hot-Jupiter atmospheres that self consistently models the entire planet in 3D, accounting for both radiative and advective phenomena. Analytic formulations for the radiative component of the energy budget are readily available but an analytic model for the advective component, characterized primarily by strong jets, has proven elusive. To address this, we utilize GCM models to decouple the two processes. Utilizing a subset of simulations with very large damping we effectively reproduce the analytic radiative solution, which can then be subtracted off the full results to isolate the advective component. We find this advective component is well modeled in pressure, latitude, and longitude by subdividing the atmosphere into longitudinal sections, with negative values on the dayside where the jet is removing energy, and positive values on the nightside where energy is deposited. The extent of this term in pressure defines the depth to which the jet penetrates into the atmosphere while the latitudinal extent defines the width. The framework is sufficiently flexible to recreate a wide variety of atmospheres, including oddballs like westward shifted offsets.
How to cite: Dobbs-Dixon, I.: GCM-Motivated Multidimensional Atmospheric Temperature Parameterization, Europlanet Science Congress 2022, Granada, Spain, 18–23 Sep 2022, EPSC2022-787, https://doi.org/10.5194/epsc2022-787, 2022.