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Modelling atmospheric biosignature and climate responses for Earth-like planets orbiting M-dwarf stars

Grenfell, John Lee and Wunderlich, Fabian and Scheucher, Markus and Sinnhuber, Miriam and Herbst, Konstantin and Rauer, Heike (2021) Modelling atmospheric biosignature and climate responses for Earth-like planets orbiting M-dwarf stars. In: Bulletin of the American Astronomical Society, 53 (3). Habitable Worlds 2021, 22.-26. Februar 2021, online.

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Official URL: https://baas.aas.org/pub/2021n3i1121/release/1?readingCollection=f2d6cb33

Abstract

We investigate the atmospheric responses in climate and photochemistry in order to assess habitability and potential biosignatures for Earth-like planets orbiting M-dwarf stars. We apply the coupled climate-chemistry column model 1D-TERRA which features a flexible climate model applicable over a wide range of atmospheric conditions ranging from Mars-like to Venus and which includes a comprehensive chemical network containing several thousand gas-phase reactions. Our numerical scheme is part of a model suite which includes a parameterization of air shower events including the influence of both ion and gas phase chemistry coupled with climate effects. Results present the influence upon commonly assessed chemical species such as oxygen, ozone, methane and nitrous oxide and we investigate their role to act as potential biosignatures over a range of external conditions including spectral type and activity.

Item URL in elib:https://elib.dlr.de/142396/
Document Type:Conference or Workshop Item (Speech)
Title:Modelling atmospheric biosignature and climate responses for Earth-like planets orbiting M-dwarf stars
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Grenfell, John LeeLee.Grenfell (at) dlr.deUNSPECIFIED
Wunderlich, Fabianfabian.wunderlich (at) dlr.dehttps://orcid.org/0000-0002-2238-5269
Scheucher, Markusmarkus.scheucher (at) dlr.deUNSPECIFIED
Sinnhuber, MiriamKarlsruhe Institute of Technology (KIT), Karlsruhe, GermanyUNSPECIFIED
Herbst, KonstantinInstitut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, Kiel, GermanyUNSPECIFIED
Rauer, Heikeheike.rauer (at) dlr.deUNSPECIFIED
Date:24 February 2021
Journal or Publication Title:Bulletin of the American Astronomical Society
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:53
Status:Published
Keywords:Exoplanets, Atmospheres, Habitability, Biosignatures
Event Title:Habitable Worlds 2021
Event Location:online
Event Type:international Conference
Event Dates:22.-26. Februar 2021
Organizer:Nexus for Exoplanet System Science (NExSS) and the American Astronomical Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Planetary Evolution and Life
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Grenfell, John Lee
Deposited On:31 May 2021 09:57
Last Modified:31 May 2021 09:57

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