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Imaging observations of the equatorward limit of midlatitude traveling ionospheric disturbances

Abstract

This paper reports the first attempt to observe the equatorward limit of medium-scale traveling ionospheric disturbances (TIDs) in the middle latitudes. The TIDs usually propagate southwestward in the northern hemisphere. An all-sky cooled-CCD imager measured 630-nm airglow at a southern island of Japan, Okinawa (26.9°N, 128.3°E, geomagnetic latitude (MLAT) = 17.0°), during the FRONT-2 campaign of August 4–15, 1999. The TIDs were detected at the mainland of Japan (21°–36° MLAT) by the total electron content (TEC) observations of more than 1000 GPS receivers. In the August 4 event, the TIDs moving southwestward was seen only in the northern sky of Okinawa as a depletion band in the 630-nm airglow images. In the August 6 event, the TIDs were not seen in the 630-nm images at Okinawa, although weak TID activity was observed by the GPS network at the mainland of Japan. The TEC data also showed weakening of the TID activity below 18° MLAT. Based on these observations, we suggest that there is a possible limit of medium-scale TID propagation around 18° MLAT.

References

  • Francis, S. H., A theory of medium-scale traveling ionospheric disturbances, J. Geophys. Res., 79, 5245–5260, 1974.

    Article  Google Scholar 

  • Garcia, F. J., M. C. Kelley, J. J. Makela, and C.-S. Huang, Airglow observations of mesoscale low-velocity traveling ionospheric disturbances at midlatitudes, J. Geophys. Res., 105, 18,407–18,415, 2000.

    Article  Google Scholar 

  • Hamza, A. M., Perkins instability revisited, J. Geophys. Res., 104, 22,567–22,575, 1999.

    Article  Google Scholar 

  • Hanumath Sastri, J., K. B. Ramesh, and D. Karunakaran, On the nature of substorm-related transient electric field disturbances in the equatorial ionosphere, Planet. Space Sci., 40, 95–103, 1992.

    Article  Google Scholar 

  • Hines, C. O., Internal atmospheric gravity waves at ionospheric heights, Can. J. Phys., 38, 1441–1481, 1964.

    Article  Google Scholar 

  • Hooke, W. H., Ionospheric irregularities produced by internal atmospheric gravity waves, J. Atmos. Terr. Phys., 30, 795–823, 1968.

    Article  Google Scholar 

  • Kubota, M., K. Shiokawa, M. K. Ejiri, Y. Otsuka, T. Ogawa, T. Sakanoi, H. Fukunishi, M. Yamamoto, S. Fukao, and A. Saito, Traveling ionospheric disturbances observed in the OI 630-nm nightglow images over Japan by using a multi-point imager network during the FRONT campaign, Geophys. Res. Lett., 24, 4037–4040, 2000.

    Article  Google Scholar 

  • Mendillo, M., J. Baumgardner, D. Nottingham, J. Aarons, B. Reinisch, J. Scali, and M. Kelley, Investigations of thermospheric-ionospheric dynamics with 6300-A images from the Arecibo Observatory, J. Geophys. Res., 102, 7331–7343, 1997.

    Article  Google Scholar 

  • Ogawa, T., N. Balan, Y. Otsuka, K. Shiokawa, C. Ihara, T. Shimomai, and A. Saito, Observations and modeling of 630 nm airglow and total electron content associated with traveling ionospheric disturbances over Shigaraki, Japan, Earth Planets Space, 54, this issue, 45–56, 2002.

    Article  Google Scholar 

  • Perkins, F., Spread F and ionospheric currents, J. Geophys. Res., 78, 218–226, 1973.

    Article  Google Scholar 

  • Saito, A., S. Fukao, and S. Miyazaki, High resolution mapping of TEC perturbations with the GSI GPS network over Japan, Geophys. Res. Lett., 25, 3079–3082, 1998.

    Article  Google Scholar 

  • Saito, A., M. Nishimura, M. Yamamoto, M. Kubota, K. Shiokawa, Y. Otsuka, T. Tsugawa, S. Fukao, T. Ogawa, M. Ishii, T. Sakanoi, and S. Miyazaki, Traveling ionospheric disturbances detected in the FRONT campaign, Geophys. Res. Lett., 28, 689–692, 2001.

    Article  Google Scholar 

  • Shiokawa, K., Y. Katoh, M. Satoh, M. K. Ejiri, T. Ogawa, T. Nakamura, T. Tsuda, and R. H. Wiens, Development of optical mesosphere thermosphere imagers (OMTI), Earth Planets Space, 51, 887–896, 1999.

    Article  Google Scholar 

  • Shiokawa, K., Y. Katoh, M. Satoh, M. K. Ejiri, and T. Ogawa, Integrating-sphere calibration of all-sky cameras for nightglow measurements, Adv. Space Sci., 26, 1025–1028, 2000a.

    Article  Google Scholar 

  • Shiokawa, K., Y. Otsuka, T. Ogawa, K. Igarashi, S. Miyazaki, F. J. Rich, A. Saito, and K. Yumoto, Comprehensive imaging observations of midlatitude ionospheric disturbances during storm time substorms, J. Geophys. Res., 105, 27,067–27,080, 2000b.

    Article  Google Scholar 

  • Sobral, J. H. A., M. A. Abdu, W. D. González, B. T. Tsurutani, I. S. Batista, and A. L. Clua de González, Effects of intense storms and substorms on the equatorial ionosphere/thermosphere system in the American sector from ground-based and satellite data, J. Geophys. Res., 102, 14,305–14,313, 1997.

    Article  Google Scholar 

  • Taylor, M. J., J.-M. Jahn, S. Fukao, and A. Saito, Possible evidence of gravity wave coupling into the mid-latitude F region ionosphere during the SEEK campaign, Geophys. Res. Lett., 25, 1801–1804, 1998.

    Article  Google Scholar 

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Shiokawa, K., Otsuka, Y., Ejiri, M.K. et al. Imaging observations of the equatorward limit of midlatitude traveling ionospheric disturbances. Earth Planet Sp 54, 57–62 (2002). https://doi.org/10.1186/BF03352421

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  • DOI: https://doi.org/10.1186/BF03352421

Keywords

  • Total Electron Content
  • Ionospheric Disturbance
  • Total Electron Content Variation
  • Total Electron Content Data
  • Virtual Height