Impact-induced atmospheres and oceans on Earth and Venus

  title={Impact-induced atmospheres and oceans on Earth and Venus},
  author={Takafumi Matsui and Yutaka Abe},
High-velocity impacts of planetesimals onto a growing planet result in the impact-degassing of volatiles and the formation of an impact-induced atmosphere. Because of the blanketing effect of such an atmosphere, it is likely that the surface of the proto-Venus melted once the radius exceeded ∼40% of the final radius. The final mass of H2O in the impact-generated atmosphere, predicted to be ∼1021 kg on the basis of thermal evolution models of the growing proto-Venus, does not depend on the… CONTINUE READING