by matthew polacek. atmospheric ch 4 on earth biological sources methanogens abiotic sources uv...
DESCRIPTION
Early Measurements Canada-France-Hawaii telescope NASA IRTF PFS MEX TES Indications of global averages and localized plumes of methaneTRANSCRIPT
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Methane on Mars:Mars Methane Detection and Variability at Gale Crater
By Matthew Polacek
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Methane Production
Atmospheric CH4 on Earth Biological sources
Methanogens Abiotic sources
UV degradation Geothermal Production Etc.,
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Detection of Methane on Mars Early Measurements
Canada-France-Hawaii telescope NASA IRTF PFS MEX TES
Indications of global averages and localized plumes of methane
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Modeling Methane on Mars Plume findings are questionable
Variability in measurements Lack of supporting evidence
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Tunable Laser Spectrometer Increased accuracy of the TLS at
SAM on the Curiosity Rover Two channel tunable laser
spectrometer Channel 1, 2.78 microns Channel 2, 3.27 microns
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Observations
Note: 1-sol=24 hours 37.5 minutes Data from 605 sols 11 direct ingest measurements and
2 methane enrichment experiments Three groups
Low-methane direct ingest Low-methane enrichment runs High-methane direct ingest
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Analysis
Exogenous organics IDP and comets
Modeling UV/CH4 conversion rate 2.2 ppbv model vs. .7 ppbv actual
High-methane results No quantitative correlation
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Source:
Mars methane detection and variability at Gale crater Christopher R. Webster et al. Science 347, 415 (2015);
DOI: 10.1126/science.1261713