Atmospheres of early Noachian Mars

Details Atmospheres of early Noachian Mars Atmospheres of early Noachian Mars

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.1406t&link_type=abstract

American Astronomical Society, DPS meeting #40, #14.06; Bulletin of the American Astronomical Society, Vol. 40, p.408

Astronomy and Astrophysics

Astronomy

Scientific paper

We investigate the response of CO2-rich upper atmospheres of early Mars and Venus to the extreme solar EUV radiation from the young Sun by using a newly developed 1-D, multi-component, hydrodynamic thermosphere-ionosphere model (Tian et al. 2008a,b). It is shown that the weak gravity field of Mars, in combination with the strong solar EUV radiation from a young Sun, makes the thermal escape of atomic carbon and oxygen efficient. As a result, it would have been unlikely for the planet to have maintained a dense CO2 atmosphere during the early Noachian - prior to 4.1 billion years ago (Tian et al. 2008c). Without a dense CO2 atmosphere early Mars would have remained cold, until mid or late Noachian. In contrast, a CO2-rich atmosphere of early Venus was much more stable.
Table of Contents
References
Tian, F., J.F. Kasting, H. Liu, R.G. Roble, Hydrodynamic planetary thermosphere model:. 1. The response of the Earth's thermosphere to extreme solar EUV conditions and the significance of adiabatic cooling, J. Geophys. Res., 113, E05008 doi:10.1029/2007JE002946 (2008a)
Tian, F., S.C. Solomon, L. Qian, J. Lei, R.G. Roble, Hydrodynamic planetary thermosphere model: 2. coupling of an electron transport/energy deposition model, J. Geophys. Res., 113, E07005, doi:10.1029/2007JE003043 (2008b).
Tian, F., J.F. Kasting, S.C. Solomon, Fast thermal escape of carbon and oxygen from a dense, CO2-ruch early Martian atmosphere. Science (2008c), under review.

Affiliated with

Also associated with

No associations

Rating

Atmospheres of early Noachian Mars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Atmospheres of early Noachian Mars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atmospheres of early Noachian Mars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1436728