Accuracy tests of radiation schemes used in hot Jupiter global circulation models

摘要: The treatment of radiation transport in global circulation models (GCMs) is crucial for correctly describing Earth and exoplanet atmospheric dynamics processes. two-stream approximation correlated-k method are currently state-of-the-art approximations applied both hot Jupiter GCM schemes to facilitate the rapid calculation fluxes heating rates. Their accuracy have been tested extensively Earth-like conditions, but verification methods’ applicability Jupiter-like conditions lacking literature. We adapting UK Met O ce GCM, Unified Model (UM), study Jupiters, present this work adaptation Edwards-Slingo scheme based on method. discuss absorption coe cients from high-temperature line lists highlight large uncertainty pressure-broadened widths. compare rates obtained with our adapted more accurate discrete ordinate (DO) line-by-line (LbL) calculations ignoring scattering e ects. find that, most cases, errors stay below 10% using 10 k-coe each band a di usivity factor D = 1:66. contribute non-negligibly total error. also that band-averaged cients, which previously used radiative-hydrodynamical simulations Jupiter, may yield 100%, should thus be caution.