000005895 001__ 5895
000005895 005__ 20221214185259.0
000005895 0247_ $$2DOI$$a10.1016/j.pss.2010.11.010
000005895 037__ $$aSCART-2022-0120
000005895 100__ $$aPham, L. B. S. 
000005895 245__ $$aEffects of impacts on the atmospheric evolution: Comparison between Mars, Earth, and Venus
000005895 260__ $$c2011
000005895 520__ $$aClassified as a terrestrial planet, Venus, Mars, and Earth are similar in several aspects such as bulk composition and density. Their atmospheres on the other hand have significant differences. Venus has the densest atmosphere, composed of CO2 mainly, with atmospheric pressure at the planet's surface 92 times that of the Earth, while Mars has the thinnest atmosphere, composed also essentially of CO2, with only several millibars of atmospheric surface pressure. In the past, both Mars and Venus could have possessed Earth-like climate permitting the presence of surface liquid water reservoirs. Impacts by asteroids and comets could have played a significant role in the evolution of the early atmospheres of the Earth, Mars, and Venus, not only by causing atmospheric erosion but also by delivering material and volatiles to the planets. Here we investigate the atmospheric loss and the delivery of volatiles for the three terrestrial planets using a parameterized model that takes into account the impact simulation results and the flux of impactors given in the literature. We show that the dimensions of the planets, the initial atmospheric surface pressures and the volatiles contents of the impactors are of high importance for the impact delivery and erosion, and that they might be responsible for the differences in the atmospheric evolution of Mars, Earth and Venus.
000005895 594__ $$aNO
000005895 700__ $$aKaratekin, O. 
000005895 700__ $$aDehant, V. 
000005895 773__ $$c1087-1092$$n10$$pPlanetary and  Space Science$$v59$$y2011
000005895 8560_ $$flebinhsan.pham@observatoire.be
000005895 85642 $$ahttps://www.sciencedirect.com/science/article/pii/S0032063310003478?via%3Dihub
000005895 905__ $$apublished in
000005895 980__ $$aREFERD