Atomic oxygen concentrations in the lower auroral thermosphere |
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| Authors: | IC McDade EJ Llewellyn FR Harris |
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| Institution: | 1. Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0, Canada;7. Herzberg Institute of Astrophysics, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada |
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| Abstract: | Atomic oxygen concentrations derived from the nightglow components of O2(b1Σg+ ? X3Σg?) (0-0) Atmospheric Band emission profiles obtained during two rocket-borne photometer measurements of aurora are presented. The peak atomic oxygen concentrations of 2–3 × 1011 cm?3 are in better agreement with those of the MSIS-83 model than the CIRA 1972 mean reference atmosphere, although the shapes of the two derived profiles differ considerably from that of MSIS-83. The derived concentrations do not contradict the suggestion made by some investigators that the atomic oxygen concentrations in the auroral zone are depleted relative to their mid-latitude values. |
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