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Shiokawa et al. 2003
Shiokawa, K., Ihara, C., Otsuka, Y. and Ogawa, T. (2003). Statistical study of nighttime medium-scale traveling ionospheric disturbances using midlatitude airglow images. Journal of Geophysical Research 108: doi: 10.1029/2002JA009491. issn: 0148-0227.

We have investigated statistical characteristics of the nighttime medium-scale traveling ionospheric disturbances (MSTIDs) observed in 630-nm airglow images at two stations, Rikubetsu (43.5¿N, 34.8¿MLAT) and Shigaraki (34.9¿N, 25.4¿MLAT), in Japan for 1998--2000 near the solar maximum period. Most of the observed MSTIDs propagate southwestward in the images. The typical wavelength, velocity, period, and amplitude are 100--300 km, 50--100 m/s, 0.5--1.5 h, and 5--15%, respectively. Seasonal variations in these parameters are not clear. The occurrence rate has a major peak (50--60%) in summer that appears ~2 months earlier at lower latitudes and a minor peak in winter. Similar occurrence characteristics are obtained from midlatitude spread-F signatures using multipoint ionosonde data in Japan, though the coincidence of the spread-F and the MSTIDs in airglow images is only 10--15%.

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Abstract

Keywords
Ionosphere, Ionospheric irregularities, Ionosphere, Ionospheric dynamics, Ionosphere, Midlatitude ionosphere, Atmospheric Composition and Structure, Airglow and aurora, Meteorology and Atmospheric Dynamics, Thermospheric dynamics
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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