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A Comprehensive Coupled Chemistry Model (C³M) for Planetary Atmospheres

Presentation #325.05 in the session Origin and Evolution of Giant Planet Systems I (Poster + Lightning Talk)

Published onOct 23, 2023
A Comprehensive Coupled Chemistry Model (C³M) for Planetary Atmospheres

Simulating atmospheric chemistry of planetary atmospheres is a daunting task owing to the complexities of reaction networks, and coupling with radiative and dynamical processes. Yet, the distribution of chemical species is crucial in determining the energy budget of the atmosphere and forcing atmospheric circulation. We present a comprehensive coupled chemistry model (C3M), a C++ based atmospheric chemistry solver for planetary atmospheres. It is built upon the Athena++ framework and Cantera, a publicly available chemical kinetics package for combustion applications. We have inherited photochemical reaction networks and cross sections from VULCAN, CalTech/JPL KINETICS and ATMOS codes. C3M can run in a standalone 1D mode, or can be coupled to a hydrodynamic model, via SNAP (Li, C., & Chen, X. (2019)), or a multi-scattering radiative transfer model, via HARP (Li, C., Le, T., Zhang, X., & Yung, Y. L. (2018)) . Here we demonstrate the capabilities of C3M through three application test cases: (i) Jovian thermochemistry, (ii) Earth’s stratospheric chemistry, (iii) Ion chemistry in Jupiter’s auroral region. C3M is currently configured for gas-phase chemistry but it is evolving toward solving gas-phase chemistry with cloud/haze microphysics. Thus, C3M is built to further the understanding of the complex interaction between atmospheric systems, to interpret in-situ and remote sensing data from space missions, and to provide a much-needed tool for the whole planetary atmosphere community. In future, C3M will be extended to investigate atmospheric chemistry of Venus and resolve cloud forming vapors under various dynamical forcing conditions.

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