A search for the springtime transition of lower thermospheric atomic oxygen using long-term midlatitude airglow data

Details A search for the springtime transition of lower thermospheric atomic oxygen using long-term midlatitude airglow data A search for the springtime transition of lower thermospheric atomic oxygen using long-term midlatitude airglow data

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jastp..62.1215s&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 62, Issue 13, p. 1215-1219.

Physics

4

Scientific paper

The springtime transition is characterized by a rapid 2-day rise in oxygen airglow intensity (558 nm) by a factor of 2-3, and a subsequent fall by a factor of 10 in the same period of time /[Shepherd et al. (J. Geophys. Res. 104 (1999) 213-223)/]. We have investigated the transition using atomic oxygen airglow data obtained at Kiso (35.8°N,137.6°E), Japan over a period of 16 years, from 1979 to 1994. In many years, we found characteristic excursions showing a rapid rise and fall of oxygen airglow intensity in the spring. However, after the excursions the emission rate did not decrease below the value it had before the rise. Statistical analysis shows that the rapid intensity change occurs not only in the spring but also in all the other seasons except winter. For several excursion events, we found that the amplitude of the nocturnal variation of airglow intensity also increases around the days with peak intensities.

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