Asymmetries in the simulated ozone distribution on TRAPPIST-1e due to orography ...

• Main Authors: Bhongade, Anand, Marsh, Daniel R, Sainsbury-Martinez, Felix, Cooke, Gregory J
• Format: Report
• Language: unknown
• Published: arXiv 2024
• Subjects: Earth and Planetary Astrophysics astro-ph.EP; FOS Physical sciences; Pacific; South Pole; South pole
• Online Access: https://dx.doi.org/10.48550/arxiv.2407.02444; https://arxiv.org/abs/2407.02444

TRAPPIST-1e is a tidally locked rocky exoplanet orbiting the habitable zone of an M dwarf star. Upcoming observations are expected to reveal new rocky exoplanets and their atmospheres around M dwarf stars. To interpret these future observations we need to model the atmospheres of such exoplanets. We configured CESM2-WACCM6, a chemistry climate model, for the orbit and stellar irradiance of TRAPPIST-1e assuming an initial Earth-like atmospheric composition. Our aim is to characterize the possible ozone (O$_3$) distribution and explore how this is influenced by the atmospheric circulation shaped by orography, using the Helmholtz wind decomposition and meridional mass streamfunction. The model included Earth-like orography and the substellar point was located over the Pacific Ocean. For such a scenario, our analysis reveals a North-South asymmetry in the simulated O$_3$ distribution. The O$_3$ concentration is highest below 10 hPa level (below $\sim$30 km) near the South pole. This asymmetry results from the ... : Submitted to ApJ ...