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Mariner 9 Ultraviolet Spectrometer Experiment: Mars atomic oxygen 1304-A emission

1973; American Geophysical Union; Volume: 78; Issue: 22 Linguagem: Inglês

10.1029/ja078i022p04547

2156-2202

D. J. Strickland, A. I. F. Stewart, C. A. Barth, C. W. Hord, A. L. Lane,

Space Exploration and Technology

Journal of Geophysical Research (1896-1977)Volume 78, Issue 22 p. 4547-4559 Mariner 9 Ultraviolet Spectrometer Experiment: Mars atomic oxygen 1304-A emission D. J. Strickland, D. J. StricklandSearch for more papers by this authorA. I. Stewart, A. I. StewartSearch for more papers by this authorC. A. Barth, C. A. BarthSearch for more papers by this authorC. W. Hord, C. W. HordSearch for more papers by this authorA. L. Lane, A. L. LaneSearch for more papers by this author D. J. Strickland, D. J. StricklandSearch for more papers by this authorA. I. Stewart, A. I. StewartSearch for more papers by this authorC. A. Barth, C. A. BarthSearch for more papers by this authorC. W. Hord, C. W. HordSearch for more papers by this authorA. L. Lane, A. L. LaneSearch for more papers by this author First published: 1 August 1973 https://doi.org/10.1029/JA078i022p04547Citations: 47AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Selected results are presented for an analysis of Mariner 9 1304-A data from the first 100 passes. Based on a comparison of limb data, the exospheric temperature appears lower on several Mariner 9 passes than when Mariner 6 and 7 encountered the planet in 1969. Temperatures of 300° and 350°K are considered in the atmospheric modeling. At 300°, derived values of the atomic oxygen concentration are typically between 0.5% and 1% of the total density at 135 km, based on fitting theoretical intensities to limb data from several passes. Structure in the limb data below 200 km suggests the possibility that ∼0.2 kR of the observed ∼0.8 kR near 150 km is due to dissociative excitation of CO2. There is variability in limb profiles, thus indicating changes in the O distribution with time. The variability does not appear to follow a recognizable pattern. Interpretation of the 1304-A disc data shows a correlation in intensity with the 10.7-cm solar flux and larger O concentrations in the afternoon than in the morning. The correlation in intensity with the 10.7-cm flux is probably due largely to variation in the solar 1304-A fluxes. Selected disc data show localized and random enhancements in the intensity. References Ajello, J. M., Emission cross sections of CO2by electron impact in the interval 1260–4500 A, 2, J. Chem. Phys., 55, 3169, 1971. Anderson, D. E., W. W. Hord, Mariner 6 and 7 ultraviolet spectrometer experiment: analysis of hydrogen Lyman alpha data, J. Geophys. Res., 75, 6666, 1971. Barth, C. A., C. W. Hord, J. B. Pearce, K. K. Kelly, G. P. Anderson, A. I. Stewart, Mariner 6 and 7 ultraviolet spectrometer experiment: Upper atmosphere data, J. Geophys. Res., 76, 2213–2227, 1971. Barth, C. A., C. W. Hord, A. I. Stewart, A. L. Lane, Mariner 9 ultraviolet spectralmeter experiment: Initial results, Science, 175, 309, 1972a. Barth, C. A., A. I. Stewart, C. W. Hord, A. L. Lane, Mariner 9 ultraviolet spectrometer experiment: Mars airglow spectroscopy and variations in Lyman alpha, Icarus, 17, 457–468, 1972b. Blamont, J. E., A. Vidal-Madjar, Monitoring of the Lyman-alpha emission line of the sun during the year 1969, J. Geophys. Res., 76, 4311, 1971. Dickinson, R. E., E. C. Ridley, Large-scale transport and the composition of the Venusian thermosphere, J. Atmos. Sci., 29, 1577, 1972. Dickinson, R. W., Circulation and thermal structure of the Venusian thermosphere, J. Atmos. Sci., 28, 885, 1971. Donahue, T. M., Upper atmosphere and ionosphere of Mars, Science, 152, 763, 1966. Gentieu, E. P., J. E. Mentall, Cross sections for production of the CO(A1Π-X1Σ) fourth positive band system and O(3S) by Photo-dissociation of CO2NASA Rep. X-691-72-418, 1972. Hall, L. A., H. E. Hinteregger, Solar radiation in the extreme ultraviolet and its variation with solar rotation, J. Geophys. Res., 75, 6959, 1970. Kliore, A. J., D. L. Cain, G. Fjeldbo, B. L. Seidel, M. J. Sykes, S. I. Rasool, The atmosphere of Mars from Mariner 9 radio occultation measurements, Icarus, 17, 484, 1972. McElroy, M. B., The upper atmosphere of Mars, Astrophys. J., 150, 1125, 1967. McElroy, M. B., D. M. Hunten, Photochemistry of CO2in the atmosphere of Mars, J. Geophys. Res., 75, 1188, 1970. McElroy, M. B., J. C. McConnell, Dissociation of CO2, in the Martian atmosphere, J. Atmos. Sci., 28, 880, 1971. Mumma, M. J., E. J. Stone, W. L. Borst, E. C. Zipf Jr., Dissociative excitation of vacuum ultraviolet emission features by electron impact on molecular gases, 3, CO2, J. Chem. Phys., 57, 68, 1971. Poland, H. M., G. M. Lawrence, Doppler broadening of O I 1304-A multipier in dissociatire excitation of CO2and O2, J. Chem. Phys., 58, 1425, 1973. Rountree, S. P., R. J. W. Henry, Electron-impact excitation cross sections for atomic oxygen: 3P-3S3S0, Phys. Rev., A6, 2106, 1973. Shimizu, M., The recombination of CO and O in the upper atmospheres of Venus and Mars, Icarus, 9, 593, 1968. Stewart, A. I., Mariner 6 and 7 ultraviolet spectrometer experiment: Implications of the CO2, CO, and O airglow, J. Geophys. Res., 77, 54, 1972. Stewart, A. I., C. A. Barth, C. W. Hord, A. L. Lane, Mariner 9 ultraviolet spectrometer experiment: Structure of Mars' upper atmosphere, Icarus, 17, 469, 1972. Strickland, D. J., G. E. Thomas, P. R. Sparks, Mariner 6 and 7 ultraviolet spectrometer experiment: Analysis of the O I 1304- and 1356-A emissions, J. Geophys. Res., 77, 4052, 1972. Thomas, G. E., Neutral composition of the upper atmosphere of Mars as determined from the Mariner UV spectrometer experiments, J. Atmos. Sci., 28, 859, 1971. Thomas, G. E., R. C. Bohlin, Lyman-alpha measurements of neutral hydrogen in the outer geocorona and in interplanetary space, J. Geophys. Res., 77, 2752, 1972. Zipf, E. C., E. J. Stone, Photoelectron excitation of atomic oxygen resonance radiation in the terrestrial airglow, J. Geophys. Res., 76, 6865, 1971. Citing Literature Volume78, Issue22Space Physics1 August 1973Pages 4547-4559 ReferencesRelatedInformation