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EP: Fachverband Extraterrestrische Physik
EP 4: Planetary atmospheres
EP 4.4: Talk
Tuesday, March 21, 2023, 18:45–19:00, ZEU/0160
Simulating Atmospheric Climate and Chemical Responses on a hypothetical, Earthlike Planet orbiting AD Leonis — •Julian Graupner1, John Lee Grenfell1, Hella Garny2, Anna Goetz2, and Heike Rauer1,3,4 — 1Department of Extrasolar Planets and Atmospheres, Instiute of Planetary Research, German Aerospace Centre (DLR), Berlin, Germany — 2Department of Earth System Modelling, Institute for Atmospheric Physics, German Aerospace Centre (DLR), Oberpfaffenhofen-Wesling, Germany — 3Centre for Astronomy and Astrophysics, Berlin Institute of Technology, Berlin, Germany — 4Institute for Geological Science, Free University of Berlin, Berlin, Germany
Simulating a hypothetical Earth orbiting the active M-dwarf star AD Leonis is well-established since the stellar spectrum is well-characterized and there are numerous model studies in the literature. A long-term aim is to estimate the transport, climate and photochemical effects using a column climate-photochemical model loosely coupled with a parameterized 3D model. The column model is integrated over a range of latitudes which then generates a temperature map used as input for the 3D transport model. In the present study we report only results from the 1D model study for Earth placed around AD Leonis at an orbit where it receives the same instellation. Compared with previous column model studies we find that recent improvements in our climate and chemistry modules has led to modest changes in our simulated cold trap, hence water vapor abundances and also in the middle atmosphere ozone amount.