| 主な研究成果 |
Ishida, T., Y. Ogawa, A. Kadokura, K. Hosokawa, and Y. Otsuka, Direct observations of blob deformation during a substorm, Ann. Geophys., 33, 525-530, doi:10.5194/angeo-33-525-2015, may 2015.
Hosokawa, K. and Y. Ogawa, Ionospheric variation during pulsating aurora, J. Geophys. Res., DOI: 10.1002/2015JA021401, July 2015.
Ogawa, Y., T. Motoba, S. C. Buchert, I. Haggstrom and S. Nozawa, Upper atmosphere cooling over the past 33 years, Geophys. Res. Lett., 41, 5629-5635, doi:10.1002/2014GL060591, September 2014.
Ishida, T., Y. Ogawa, A. Kadokura, Y. Hiraki, and I. Haggstrom, Seasonal variation and solar activity dependence of the quiet-time ionospheric trough, J. Geophys. Res., doi:10.1029/2014JA019996, September, 2014.
Ogawa, Y., M. Sawatsubashi, S. C. Buchert, K. Hosokawa, S. Taguchi, S. Nozawa, S. Oyama, T. T. Tsuda, and R. Fujii, Relationship between auroral substorm and ion upflow in the nightside polar ionosphere, J. Geophys. Res. Space Physics, 118, doi:10.1002/2013JA018965, 2013.
小川泰信, 野澤悟徳, I. Haggstrom, 大山伸一郎, 元場哲郎, 津田卓雄, 齋藤昭則, 宮下幸長, 田中良昌, 堀智昭, 上野玄太, 宮岡宏, 藤井良一, 欧州非干渉散乱（EISCAT）レーダーの大規模データ処理と可視化, 宇宙科学情報解析論文誌, vol. 1, 83-89, 2012.
Fujiwara, H., S. Nozawa, S. Maeda, Y. Ogawa, Y. Miyoshi, H. Jin, H. Shinagawa, K. Terada,
Polar cap thermosphere and ionosphere during the solar minimum period: EISCAT Svalbard radar observations and GCM simulations, Earth, Planet and Space, vol. 64, 459-465, 2012.
Ogawa, Y., S. C. Buchert, I. Häggström, M. T. Rietveld, R. Fujii, S. Nozawa, and H. Miyaoka, On the statistical relation between ion upflow and naturally enhanced ion-acoustic lines observed with the EISCAT Svalbard radar, J. Geophys. Res., vol. 116, A03313, doi:10.1029/2010JA015827, 2011.
Tanaka, Y.-M., T. Aso, B. Gustavsson, K. Tanabe, Y. Ogawa, A. Kadokura, H. Miyaoka, T. Sergienko, U. Brändström, and I. Sandahl, Feasibility study on Generalized - Aurora Computed Tomography, Ann. Geophys., vol. 29, 551-562, 2011.
Ogawa, Y., S. C. Buchert, A. Sakurai, S. Nozawa, and R. Fujii, Solar activity dependence of ion upflow in the polar ionosphere observed with the European Incoherent Scatter (EISCAT) Tromsø UHF radar, J. Geophys. Res., vol. 115, A07310, doi:10.1029/2009JA014766, 2010.
Nozawa, S., Y. Ogawa, S. Oyama, H. Fujiwara, T. Tsuda, A. Brekke, C. M. Hall, Y. Murayama, S. Kawamura, H. Miyaoka, and R. Fujii, Tidal waves in the polar lower thermosphere observed using the EISCAT long run data set obtained in September 2005, J. Geophys. Res., vol. 115, A08312, doi:10.1029/2009JA015237, 2010.
Hosokawa, K., Y. Ogawa, A. Kadokura, H. Miyaoka and N. Sato, Modulation of ionospheric conductance and electric field associated with pulsating aurora, J. Geophys. Res., vol. 115, A03201, doi:10.1029/2009JA014683, 2010.
Hosokawa, K. and Y. Ogawa, Pedersen current carried by electrons in auroral D-region, Geophys. Res. Lett., vol. 37, L18103, doi:10.1029/2010GL044746, 2010.
Kurihara, J., Y. Ogawa, S. Oyama, S. Nozawa, M. Tsutsumi, C. M. Hall, Y. Tomikawa, and R. Fujii, Links between a stratospheric sudden warming and thermal structures and dynamics in the high-latitude mesosphere, lower thermosphere, and ionosphere, Geophys. Res. Lett., vol. 37, L13806, doi:10.1029/2010GL043643, 2010.
Oyama, S., K. Shiokawa, J. Kurihara, T. T. Tsuda, S. Nozawa, Y. Ogawa, Y. Otsuka, and B. J. Watkins, Lower-thermospheric wind fluctuations measured with an FPI in pulsating aurora at Tromsoe, Norway, Ann. Geophys., vol. 28, 1847-1857, 2010.
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