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Atmospheric processes affecting methane on Mars

Grenfell, John Lee and Wunderlich, Fabian and Sinnhuber, B.-M. and Herbst, K and Lehmann, R and Scheucher, M. and Gebauer, Stefanie and Arnold, Gabriele and Rauer, H (2022) Atmospheric processes affecting methane on Mars. EPSC, 18.-23. September 2022, Granada, Spain. doi: 10.5194/epsc2022-885.

Full text not available from this repository.

Official URL: https://meetingorganizer.copernicus.org/EPSC2022/EPSC2022-885.html

Abstract

It is currently uncertain as to whether methane exists on Mars. Data from the Curiosity Rover suggests a background methane concentration of a few tenths parts per billion whereas data from the Trace Gas Orbiter suggest an upper limit of twenty parts per trillion. If methane exists on Mars then we do not understand fully the physical and chemical processes affecting its lifetime. Atmospheric models suggest an over-estimate in the lifetime by a factor of around six hundred compared with earlier observations. In the present work we assume the Curiosity Rover background methane value and estimate the uncertainty in atmospheric chemistry and mixing processes in our atmospheric column model 1D TERRA. Results suggest that these processes can only explain a factor of ~sixteen lowering in the methane lifetime. This implies that if methane is present then additional, currently unknown processes are required to explain the observed lifetime.

Item URL in elib:https://elib.dlr.de/191046/
Document Type:Conference or Workshop Item (Speech)
Title:Atmospheric processes affecting methane on Mars
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Grenfell, John LeeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wunderlich, FabianUNSPECIFIEDhttps://orcid.org/0000-0002-2238-5269UNSPECIFIED
Sinnhuber, B.-M.Karlsruhe Institute of Technology (KIT), Karlsruhe, GermanyUNSPECIFIEDUNSPECIFIED
Herbst, KInstitut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, Kiel, GermanyUNSPECIFIEDUNSPECIFIED
Lehmann, RAlfred-Wegener Institut Helmholtz-Zentrum fuer Polar- und Meeresforschung, Telegrafenberg, 14473 Potsdam, GermanyUNSPECIFIEDUNSPECIFIED
Scheucher, M.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA; Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt, D-12489 Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Gebauer, StefanieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Arnold, GabrieleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rauer, HUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:2022
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:16
DOI:10.5194/epsc2022-885
Series Name:EPSC Abstracts
Status:Published
Keywords:Mars, atmosphere, modeling, methane
Event Title:EPSC
Event Location:Granada, Spain
Event Type:international Conference
Event Dates:18.-23. September 2022
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 - Project PLATO - PMC and Science
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:29 Nov 2022 07:39
Last Modified:29 Nov 2022 07:39

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