Other
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992lpico.789...23c&link_type=abstract
In Lunar and Planetary Inst., Papers Presented to the International Colloquium on Venus p 23-24 (SEE N93-14288 04-91)
Other
1
Airglow, Atmospheric Chemistry, Atmospheric Physics, Atmospheric Radiation, Near Infrared Radiation, Oxygen, Photochemical Reactions, Venus (Planet), Venus Atmosphere, Carbon Dioxide, Exothermic Reactions, Imaging Techniques, Oxygen Atoms, Photolysis, Photons, Recombination Reactions, Spatial Distribution, Spectroscopic Analysis, Temporal Distribution
Scientific paper
Groundbased imaging and spectroscopic observations of Venus reveal intense near-infrared oxygen airglow emission from the upper atmosphere and provide new constraints on the oxygen photochemistry and dynamics near the mesopause (approximately 100 km). Atomic oxygen is produced by the Photolysis of CO2 on the dayside of Venus. These atoms are transported by the general circulation, and eventually recombine to form molecular oxygen. Because this recombination reaction is exothermic, many of these molecules are created in an excited state known as O2(delta-1). The airglow is produced as these molecules emit a photon and return to their ground state. New imaging and spectroscopic observations acquired during the summer and fall of 1991 show unexpected spatial and temporal variations in the O2(delta-1) airglow. The implications of these observations for the composition and general circulation of the upper venusian atmosphere are not yet understood but they provide important new constraints on comprehensive dynamical and chemical models of the upper mesosphere and lower thermosphere of Venus.
Allen David A.
Bezard Bruno
Crisp Dave
de Bergh Catherine
Maillard Jean Pierre
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