Assertion: terrestrial planet's atmosphere | /r/CapableOf | strip the gas
Facets:
value: by "bombardment"
type: MANNER
value: slowly
type: MANNER
Source sentences:
text: the average surface temperature was warm enough with the greenhouse effect caused by the water vapor and CO2 for water to condense (perhaps into ocean sized regions?); as the CO2 was absorbed (dissolved) into the oceans where it was precipitated out of solution by chemical (and life?) processes and was being locked into carbonate rock the greenhouse effect was reduced, also as Mars cooled internally its nickel-iron core solidified and the planet lost its protective magnetosphere - allowing the solar wind to directly interact with the upper atmosphere slowly stripping the gas away by "bombardment", both these processes continued to reduce the greenhouse effect until the average temperature dropped below the freezing point of water; the atmospheric pressure also dropped to the point that liquid water could not exist and the water vapor left in the atmosphere was disassociated into oxygen which chemically combined with surface rocks (hence the "red" surface rocks of Mars) and hydrogen which was lost by the process of thermal escape leaving a thin, mostly CO2 atmosphere, a portion of which seasonally "freezes out" to form the "dry ice" polar caps over top of the permanent water ice polar caps.