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Atmospheric photochemistry above possible martian hot spots A.S. Wong a,*, S.K. Atreya a

Summary: Atmospheric photochemistry above possible martian hot spots
A.S. Wong a,*, S.K. Atreya a
, V. Formisano b
, Th. Encrenaz c
, N.I. Ignatiev d
Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109-2143, USA
CNR, IFSI, Area Ric Roma Tor Vergata, Via Fosso Cavaliere, 1-00144 Rome, Italy
LESIA, Observatoire de Paris, 92195 Meudon, France
Russian Academy of Science, IKI RAN, Institute of Space Research, Profsoyuznaya 84-32, Moscow 117810, Russia
Considering the possibility of outgassing from some localized sources on Mars, we have developed a one-dimensional photo-
chemical model that includes methane (CH4), sulfur dioxide (SO2) and hydrogen sulfide (H2S). Halogens were considered but were
found to have no significant impact on the martian atmospheric chemistry. We find that the introduction of methane into the
martian atmosphere results in the formation of mainly formaldehyde (CH2O), methyl alcohol (CH3OH) and ethane (C2H6), whereas
the introduction of the sulfur species produces mainly sulfur monoxide (SO) and sulfuric acid (H2SO4). Depending upon the flux of
the outgassed molecules from possible hot spots, some of these species and the resulting new molecules may be detectable locally,


Source: Atreya, Sushil - Department of Atmospheric, Oceanic and Space Science, University of Michigan


Collections: Physics