000005912 001__ 5912
000005912 005__ 20221215122118.0
000005912 0247_ $$2DOI$$a10.1016/j.pss.2015.09.022
000005912 037__ $$aSCART-2022-0122
000005912 100__ $$aPham, L.B.S.
000005912 245__ $$aScenarios of atmospheric mass evolution on Mars influenced by asteroid and comet impacts since the late Noachian
000005912 260__ $$c2016
000005912 520__ $$aEarly in its history, Mars probably had a denser atmosphere and higher surface temperatures to sustain the presence of stable liquid water or saline solution at the surface. Impacts by asteroids and comets could affect the atmospheric evolution of a planet, by removing part of its atmosphere and by delivering into it material and volatiles. In this study we investigate the atmospheric loss and delivery of volatiles between the end of the Noachian and present, with the help of a semi-analytic model. Our results suggest that impacts alone can hardly remove a significant amount of atmospheric mass over this period. Contribution of additional factors such as outgassing and non-thermal escape processes can not explain neither the presence of surface pressure larger than few hundreds of mbars 3.9 Gyr ago, unless parameter values outside of their expected range are considered. Based on extreme case scenarios, maximum surface pressures at the end of the Noachian, could be as much as 0.25 bar or 1.9 bar, with and without CO2 storage into carbonate reservoirs, respectively.
000005912 594__ $$aNO
000005912 700__ $$aKaratekin, Ö.
000005912 773__ $$c1-11$$pPlanetary and Space Science $$v125$$y2016
000005912 8560_ $$flebinhsan.pham@observatoire.be
000005912 85642 $$ahttps://www.sciencedirect.com/science/article/pii/S0032063315003098?via%3Dihub
000005912 905__ $$apublished in
000005912 980__ $$aREFERD