Portal de Periódicos da CAPES

Ion chemistry of N 2 + and the solar ultraviolet flux in the thermosphere

1976; American Geophysical Union; Volume: 81; Issue: 22 Linguagem: Inglês

10.1029/ja081i022p03762

2156-2202

Michael Oppenheimer, A. Dalgarno, H. C. Brinton,

Solar and Space Plasma Dynamics

Journal of Geophysical Research (1896-1977)Volume 81, Issue 22 p. 3762-3766 Aeronomy Ion chemistry of N2 + and the solar ultraviolet flux in the thermosphere M. Oppenheimer, M. OppenheimerSearch for more papers by this authorA. Dalgarno, A. DalgarnoSearch for more papers by this authorH. C. Brinton, H. C. BrintonSearch for more papers by this author M. Oppenheimer, M. OppenheimerSearch for more papers by this authorA. Dalgarno, A. DalgarnoSearch for more papers by this authorH. C. Brinton, H. C. BrintonSearch for more papers by this author First published: 1 August 1976 https://doi.org/10.1029/JA081i022p03762Citations: 37AboutPDF 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 Abstract We have analyzed daytime composition measurements in the thermosphere from Atmosphere Explorer-C by use of a theory of the ion chemistry. We compare predicted and measured N2+ densities in order to infer global variations of the solar ionizing flux. Our results indicate that the solar flux of Hinteregger measured on Atmosphere Explorer-C provides an adequate basis for the calculation of solar ultraviolet photo-ionization rates. The role of metastable species is examined, and theoretical O+(²D) densities are presented. References Brace, L. H., R. F. Theis, A. Dalgarno, The cylindrical electrostatic probes for Atmosphere Explorer-C, -D, and -E, Radio Sci., 8, 341– 348, 1973. Brinton, H. C., L. R. Scott, M. W. Pharo III, J. T. C. Coulson, The Bennett ion-mass spectrometer on Atmosphere Explorer-C and -E, Radio Sci., 8, 323– 332, 1973. Dalgarno, A., W. B. Hanson, N. W. Spencer, E. R. Schmerling, The Atmosphere Explorer mission, Radio Sci., 8, 263– 266, 1973. Farragher, A. L., Ion-molecule reaction rate studies in a flowing afterglow system, Trans. Faraday Soc., 66, 1411– 1422, 1970. Feldman, P. D., Daytime ion chemistry of N2+, J. Geophys. Res., 78, 2010– 2016, 1973. Hanson, W. B., D. R. Zuccaro, C. R. Lippincott, S. Sanatani, The retarding-potential analyzer on Atmosphere Explorer, Radio Sci., 8, 333– 340, 1973. Hays, P. B., G. Carignan, B. C. Kennedy, G. G. Shepherd, J. C. G. Walker, The visible airglow experiment on Atmosphere Explorer, Radio Sci., 8, 369– 378, 1973. Hays, P. B., D. W. Rusch, D. G. Torr, W. E. Sharp, G. R. Swenson, Production and loss of O+(2P) ions in the dayglow and the aurora (abstract), Eos Trans. AGU, 56, 405, 1975. Henry, R. J. W., P. G. Burke, A. L. Sinfailam, Scattering of electrons by C, N, O, N+, O+, and O++, Phys. Rev., 178, 218– 225, 1969. Hinteregger, H. E., The extreme ultraviolet solar spectrum and its variation during a solar cycle, Ann. Geophys., 26, 547– 554, 1970. Hoffman, J. H., B. Hanson, C. R. Lippincott, E. E. Ferguson, The magnetic ion-mass spectrometer on Atmosphere Explorer, Radio Sci., 8, 315– 322, 1973a. Hoffman, R. A., J. L. Birch, R. W. Janetzke, J. F. McChesney, S. H. Way, D. S. Evans, Low-energy electron experiment for Atmosphere Explorer-C and -D, Radio Sci., 8, 393– 400, 1973b. Mauersberger, K., D. C. Kayser, W. E. Potter, A. O. Nier, Seasonal variation of neutral thermospheric constituents in the northern hemisphere, J. Geophys. Res., 81, 7– 11, 1976. McFarland, M., D. L. Albritton, F. C. Fehsenfeld, E. E. Ferguson, A. L. Schmeltekopf, Flow-drift technique for ion mobility and ion-molecule reaction rate constant measurements, 2, Positive ion reactions of N+, O+ and N2+ with O2 and O+ with N2 from thermal to ˜2 eV, J. Chem. Phys., 59, 6620– 6628, 1973. McFarland, M., D. L. Albritton, F. C. Fehsenfeld, E. E. Ferguson, A. L. Schmeltekopf, Energy dependence and branching ratio of the N2+ + O reaction, J. Geophys. Res., 79, 2925, 1974. Mehr, F. J., M. A. Biondi, Electron temperature dependence of recombinations of O2+ and N2+ ions with electrons, Phys. Rev., 181, 264– 274, 1969. Nier, A. O., W. E. Potter, D. R. Hickman, K. Mauersberger, The open-source, neutral-mass spectrometer on Atmosphere Explorer-C, -D, -E, Radio Sci., 8, 271– 276, 1973. Nier, A. O., W. E. Potter, D. C. Kayser, Atomic and molecular oxygen densities in the lower thermosphere, J. Geophys. Res., 81, 17– 24, 1976. Oppenheimer, M., A. Dalgarno, K. K. Docken, G. A. Victor, Molecular oxygen densities on the basis of Atmosphere Explorer composition measurements (abstract), Eos Trans. AGU, 56, 906, 1975. Oppenheimer, M., A. Dalgarno, H. C. Brinton, Molecular oxygen abundances in the thermosphere from the chemistry of the O2+ ion based on Atmosphere Explorer-C ion composition measurements, J. Geophys. Res., 81, 1976. Rusch, D. W., D. G. Torr, P. B. Hays, J. C. G. Walker, A. O. Nier, Creation and destruction of O+(2P) ions in the earth's thermosphere (abstract), Eos Trans. AGU, 56, 1037, 1975. Rutherford, J. A., D. A. Vroom, Effect of metastable O+(2D) on reactions of O+ with nitrogen molecules, J. Chem. Phys., 55, 5622– 5624, 1971. Seaton, M. J., D. E. Osterbrock, Relative (O II) intensities in gaseous nebulae, Astrophys. J., 125, 66– 83, 1957. Spencer, N. W., H. B. Niemann, G. R. Carignan, The neutral-atmosphere temperature instrument, Radio Sci., 8, 284– 297, 1973. Victor, G. A., A. Dalgarno, K. K. Docken, M. Oppenheimer, Solar ultraviolet intensities and atmospheric parameters (abstract), Eos Trans. AGU, 55, 1157, 1974. Walker, J. C. G., D. G. Torr, P. B. Hays, D. W. Rusch, K. Docken, G. Victor, M. Oppenheimer, Metastable 2P oxygen ions in the daytime thermosphere, J. Geophys. Res., 80, 1026– 1029, 1975. Citing Literature Volume81, Issue22Space Physics1 August 1976Pages 3762-3766 ReferencesRelatedInformation