HR: 0830h
AN: PP21B-1172    [PDF]
TI: Methan Rich Archean Atmosphere Supported by New Hydrodynamic Escape Solutions
AU: * Tian, F
EM: tian@colorado.edu
AF: LASP/University of Colorado at Boulder, Campus Box 392 University of Colorado, Boulder, CO 80309
AU: Toon, O B
EM: btoon@lasp.colorado.edu
AF: LASP/University of Colorado at Boulder, Campus Box 392 University of Colorado, Boulder, CO 80309
AU: Pavlov, A A
EM: pavlov@lasp.colorado.edu
AF: LASP/University of Colorado at Boulder, Campus Box 392 University of Colorado, Boulder, CO 80309
AU: Sterck, H D
EM: desterck@babbage.colorado.edu
AF: Department of Applied Mathematics, University of Colorado at Boulder, Campus Box 526 university of Colorado, Boulder, CO 80309
AB: Fast escape to space from Archean atmosphere is based on overestimated Jean's escape rate. New solution of hydrodynamic escape produced a much smaller escape rate. This small escape rate suggests that huge hydrogen outgassing rate from interior of the Earth is not necessary to maintain high hydrogen concentration in Archean atmosphere. Since it is easier to maintain high methane concentration in a high hydrogen concentration atmosphere, the new solution of hydrodynamic escape supports methane rich atmosphere in the Archean era.
DE: 0325 Evolution of the atmosphere
DE: 0343 Planetary atmospheres (5405, 5407, 5409, 5704, 5705, 5707)
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2003 Fall Meeting