The UK Met Office global circulation model with a sophisticated radiation scheme applied to the hot Jupiter HD 209458b
The UK Met Office global circulation model with a sophisticated radiation scheme applied to the hot Jupiter HD 209458b
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英国气象局全球环流模型采用复杂的辐射方案应用于热木星 HD 209458b
DOI:
10.1051/0004-6361/201629183
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发表时间:
2016
影响因子:
6.5
通讯作者:
Amundsen D
中科院分区:
文献类型:
--
作者:
Amundsen D
To study the complexity of hot Jupiter atmospheres revealed by observations of increasing quality, we have adapted the UK Met Office Global Circulation Model (GCM), the Unified Model (UM), to these exoplanets. The UM solves the full 3D Navier-Stokes equations with a height-varying gravity, avoiding the simplifications used in most GCMs currently applied to exoplanets. In this work we present the coupling of the UM dynamical core to an accurate radiation scheme based on the two-stream approximation and correlated-kmethod with state-of-the-art opacities from ExoMol. Our first application of this model is devoted to the extensively studied hot Jupiter HD 209458b. We have derived synthetic emission spectra and phase curves, and compare them to both previous models also based on state-of-the-art radiative transfer, and to observations. We find a reasonable agreement between observations and both our days side emission and hot spot offset, however, our night side emissions is too large. Overall our results are qualitatively similar to those found by Showman et al. (2009, ApJ, 699, 564) with the SPARC/MITgcm, however, we note several quantitative differences: Our simulations show significant variation in the position of the hottest part of the atmosphere with pressure, as expected from simple timescale arguments, and in contrast to the “vertical coherency” found by Showman et al. (2009). We also see significant quantitative differences in calculated synthetic observations. Our comparisons strengthen the need for detailed intercomparisons of dynamical cores, radiation schemes and post-processing tools to understand these differences. This effort is necessary in order to make robust conclusions about these atmospheres based on GCM results.
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
K. Heng;K. Menou;P. Phillipps
通讯作者:
P. Phillipps
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
T. Kataria;D. Sing;N. Lewis;C. Visscher;A. Showman;J. Fortney;M. Marley
通讯作者:
M. Marley
DOI:
10.1088/0004-637x/790/1/53
发表时间:
2014
期刊:
The Astrophysical Journal
影响因子:
--
作者:
R. Zellem;N. Lewis;H. Knutson;C. Griffith;A. Showman;J. Fortney;N. Cowan;E. Agol;A. Burrows;D. Charbonneau;D. Deming;G. Laughlin;J. Langton
通讯作者:
J. Langton
DOI:
10.1111/j.1365-2966.2012.21440.x
发表时间:
2012
影响因子:
4.8
作者:
J. Tennyson;S. Yurchenko
通讯作者:
S. Yurchenko
DOI:
10.1088/0004-637x/714/2/1334
发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
作者:
E. Rauscher;K. Menou
通讯作者:
K. Menou