The Loss of the Martian Atmosphere
نویسنده
چکیده
It is widely accepted that Mars had an atmosphere at least 4 Gyr ago. The processes that led to the loss of the Martian atmosphere are still debated. Solar-wind-induced sputtering, impact erosion, weathering, sequestration into the regolith and polar caps, and photodissociative reactions are the mechanisms believed to be responsible for removing the atmosphere. No one process has been shown to be capable of removing the entire Martian atmosphere, so it appears that several processes worked cooperatively to bring about the present atmosphere.
منابع مشابه
The loss of atmosphere from Mars.
Luhmann et al. (1) and Jakosky et al. (2) showed that the Martian atmosphere was eroded (sputtered) by energetic O ions that are formed from escaping 0 and accelerated back into the atmosphere by the solar wind fields. This collisional ejection process appears to explain measured isotope ratios for Ar and N in the martian atmosphere (2, 3) and it may affect the early evolution of this atmospher...
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