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Recent detection of methane (CH 4 ) on Mars has generated interest in possible biological or geological sources, but the factors responsible for the reported variability are not understood. Here we explore one potential sink that might affect the seasonal cycling of CH 4 on Mars – trapping in ices deposited on the surface. Our apparatus consisted of a high-vacuum chamber in which three...
Recent observations suggest methane in the martian atmosphere is variable on short spatial and temporal scales. However, to explain the variability by loss reactions requires production rates much larger than expected. Here, we report results of laboratory studies of methane adsorption onto JSC-Mars-1, a martian soil simulant, and suggest that this process could explain the observations. Uptake coefficient...
It has been suggested that inclusions of CO 2 or CO 2 clathrate hydrates may comprise a portion of the polar deposits on Mars. Here we present results from an experimental study in which CO 2 molecules were trapped in water ice deposited from CO 2 /H 2 O atmospheres at temperatures relevant for the polar regions of Mars. Fourier-Transform Infrared spectroscopy...
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