Detection of methane in the atmosphere of Mars.
نویسندگان
چکیده
We report a detection of methane in the martian atmosphere by the Planetary Fourier Spectrometer onboard the Mars Express spacecraft. The global average methane mixing ratio is found to be 10 +/- 5 parts per billion by volume (ppbv). However, the mixing ratio varies between 0 and 30 ppbv over the planet. The source of methane could be either biogenic or nonbiogenic, including past or present subsurface microorganisms, hydrothermal activity, or cometary impacts.
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عنوان ژورنال:
- Science
دوره 306 5702 شماره
صفحات -
تاریخ انتشار 2004