Temporal variations in the oxygen red line intensity in the subtropical arc

Measurements were made of OI 6300 A intensity in the subtropical airglow anomaly with a scanning photometer at Miyako-Jima in the Ryukyu Islands. Time variations of the observed intensities are found to be quite consistent with the theoretical results calculated from ionospheric parameters on the basis of the dissociative recombination of O2+. This leads to a conclusion that the dissociative recombination process in the ionospheric F region plays a dominant role in the oxygen red lines emission in the subtropical anomaly. (author)