Thermal escape of carbon from the early Martian atmosphere

Feng Tian, James F. Kasting, Stanley C. Solomon

Research output: Contribution to journalArticle

86 Scopus citations

Abstract

Observations suggest that Mars was wet and warm during the late Noachian, which probably requires a dense CO2 atmosphere. But would a dense CO2 early Martian atmosphere have been stable under the strong EUV flux from the young Sun? Here we show that thermal escape of carbon was so efficient during the early Noachian, 4.1 billion years ago (Ga), that a CO2-dominated Martian atmosphere could not have been maintained, and Mars should have begun its life cold. By the mid to late Noachian, however, the solar EUV flux would have become weak enough to allow a dense CO2 atmosphere to accumulate. Hence, a sustainable warm and wet period only appeared several hundred million years (Myrs) after Mars formed.

Original languageEnglish (US)
Article numberL02205
JournalGeophysical Research Letters
Volume36
Issue number2
DOIs
StatePublished - Jan 28 2009

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Thermal escape of carbon from the early Martian atmosphere'. Together they form a unique fingerprint.

  • Cite this