000005891 001__ 5891
000005891 005__ 20221214182204.0
000005891 0247_ $$2DOI$$a10.1089/ast.2008.0242
000005891 037__ $$aSCART-2022-0117
000005891 100__ $$aPham, Le Binh San
000005891 245__ $$aEffects of Meteorite Impacts on the Atmospheric Evolution of Mars
000005891 260__ $$c2009
000005891 520__ $$aEarly in its history, Mars probably had a denser atmosphere with sufficient greenhouse gases to sustain the presence of stable liquid water at the surface. Impacts by asteroids and comets would have played a significant role in the evolution of the martian atmosphere, not only by causing atmospheric erosion but also by delivering material and volatiles to the planet. We investigate the atmospheric loss and the delivery of volatiles with an analytical model that takes into account the impact simulation results and the flux of impactors given in the literature. The atmospheric loss and the delivery of volatiles are calculated to obtain the atmospheric pressure evolution. Our results suggest that the impacts alone cannot satisfactorily explain the loss of significant atmospheric mass since the Late Noachian (∼3.7–4 Ga). A period with intense bombardment of meteorites could have increased the atmospheric loss; but to explain the loss of a speculative massive atmosphere in the Late Noachian, other factors of atmospheric erosion and replenishment also need to be taken into account. Astrobiology 9, 45–54.
000005891 594__ $$aNO
000005891 6531_ $$aMars
000005891 6531_ $$aAstrobiology
000005891 6531_ $$aImpact
000005891 6531_ $$aAsteroid
000005891 700__ $$aKaratekin, Ozgür
000005891 700__ $$aDehant, Veronique
000005891 773__ $$c45-54$$n1$$pAstrobiology$$v9$$y2009
000005891 8560_ $$flebinhsan.pham@observatoire.be
000005891 85642 $$ahttps://www.liebertpub.com/doi/10.1089/ast.2008.0242
000005891 905__ $$apublished in
000005891 980__ $$aREFERD