Statistical study of nighttime medium‐scale traveling ionospheric disturbances using midlatitude airglow images
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- K. Shiokawa
- Solar‐Terrestrial Environment Laboratory Nagoya University Toyokawa Japan
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- C. Ihara
- Solar‐Terrestrial Environment Laboratory Nagoya University Toyokawa Japan
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- Y. Otsuka
- Solar‐Terrestrial Environment Laboratory Nagoya University Toyokawa Japan
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- T. Ogawa
- Solar‐Terrestrial Environment Laboratory Nagoya University Toyokawa Japan
書誌事項
- 公開日
- 2003-01
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2002ja009491
- 公開者
- American Geophysical Union (AGU)
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説明
<jats:p>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‐<jats:italic>F</jats:italic> signatures using multipoint ionosonde data in Japan, though the coincidence of the spread‐<jats:italic>F</jats:italic> and the MSTIDs in airglow images is only 10–15%.</jats:p>
収録刊行物
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- Journal of Geophysical Research: Space Physics
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Journal of Geophysical Research: Space Physics 108 (A1), 1052-, 2003-01
American Geophysical Union (AGU)
