Models of Venus neutral upper atmosphere: Structure and composition
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چکیده
منابع مشابه
Structure and composition of the neutral upper atmosphere of Mars from the MAVEN NGIMS investigation
The Mars Atmosphere and Volatile EvolutioN (MAVEN) Neutral Gas and Ion Mass Spectrometer (NGIMS) provides sensitive detections of neutral gas and ambient ion composition. NGIMS measurements of nine atomic and molecular neutral species, and their variation with altitude, latitude, and solar zenith angle are reported over several months of operation of the MAVEN mission. Sampling NGIMS signals fr...
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In spite of many spacecrafts that visited Venus, chemical composition of the Venus atmosphere and clouds present many challenging problems in observation and theory. The following problems are briefly discussed below: (1) molecular oxygen above the clouds, (2) lightning, (3) the blue absorption in the clouds, (4) mode 3 particle controversy and the Vega X-ray fluorescent observations, (5) searc...
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A consistent picture of the dynamics of the Venus upper atmosphere from 90 to 200 km has begun to emerge [e.g., Bougher, S.W., Alexander, M.J., Mayr, H.G., 1997. Upper Atmosphere Dynamics: Global Circulation and Gravity Waves. Venus II, CH. 2.4. University of Arizona Press, Tucson, pp. 259–292; Lellouch, E., Clancy, T., Crisp, D., Kliore, A., Titov, D., Bougher, S.W., 1997. Monitoring of Mesosp...
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In this work, we analysed nadir observations of atmospheric infrared emissions carried out by VIRTIS, a high-resolution spectrometer on board the European spacecraft Venus Express. We focused on the ro-vibrational band of CO2 at 4.3 μm on the dayside, whose fluorescence originates in the Venus upper mesosphere and above. This is the first time that a systematic sounding of these non-local therm...
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Carbon monoxide, produced in the Venus atmosphere by photolysis of C02, is removed mainly by reaction with OH. The radical OH is formed in part by photolysis of H 20., in part by reaction of 0 with H02 • Photolysis of HCl provides a major source of H radicals near the visible clouds of Venus and plays a major role in the overall photochemistry. The mixing ratio of 0 2 is estimated to be approxi...
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ژورنال
عنوان ژورنال: Advances in Space Research
سال: 1985
ISSN: 0273-1177
DOI: 10.1016/0273-1177(85)90200-5