論文 - 野澤 悟徳
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Depletion of mesospheric sodium during extended period of pulsating aurora
Takahashi, T; Hosokawa, K; Nozawa, S; Tsuda, TT; Ogawa, Y; Tsutsumi, M; Hiraki, Y; Fujiwara, H; Kawahara, TD; Saito, N; Wada, S; Kawabata, T; Hall, C
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122 巻 ( 1 ) 頁： 1212 - 1220 2017年
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A proposal on the study of solar-terrestrial coupling processes with atmospheric radars and ground-based observation network 査読有り
Tsuda, T., M. Yamamoto, H. Hashiguchi, K. Shiokawa, Y. Ogawa, S. Nozawa, H. Miyaoka, and A. Yoshikawa
Radio Sci. 51 巻 ( 9 ) 頁： 1587-1599 2016年7月
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Change in turbopause altitude at 52 and 70 deg N 査読有り
Hall, C. M., S. E. Holmen, C. E. Meek, A. H. Manson, and S. Nozawa
Atmos. Chem. Phys. 16 巻 頁： 2299-2308 2016年2月
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A sporadic sodium layer event detected with five-directional lidar and simultaneous wind, electron density, and electric field observation at Tromsø, Norway 査読有り
Tsuda, T. T., S. Nozawa, T. D. Kawahara, T. Kawabata, N. Saito, S. Wada, C. M. Hall, M. Tsutsumi, Y. Ogawa, S. Oyama, T. Takahashi, M. K. Ejiri, T. Nishiyama, T. Nakamura, and A. Brekke
Geophys. Res. Lett. 42 巻 頁： 9190-9196 2015年11月
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A case study on generation mechanisms of a sporadic sodium layer above Tromsø (69.6°N) during a night of high auroral activity 査読有り
Takahashi, T., S. Nozawa, T. T. Tsuda, Y. Ogawa, N. Saito, T. Hidemori, T. D. Kawahara, C. Hall, H. Fujiwara, N. Matuura, A. Brekke, M. Tsutsumi, S. Wada, T. Kawabata, S. Oyama, and R. Fujii
Ann. Geophys. 33 巻 頁： 941-953 2015年8月
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Statistical study of auroral fragmentation into patches 査読有り
Hashimoto A., K. Shiokawa, Y. Otsuka, S.-I. Oyama, S. Nozawa, T. Hori, M. Lester, and M. Johnsen
J. Geophys. Res. 120 巻 頁： 6207-6217 2015年7月
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Mesospheric and thermospheric observations of the January 2010 stratospheric warming event 査読有り
Wu, Q. and S. Nozawa
Journal of Atmospheric and Solar-Terrestrial Physics 123 巻 頁： 22-38 2015年2月
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A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data 査読有り
Takahashi, T., S. Nozawa, M. Tsutsumi, C. Hall, S. Suzuki, T. T. Tsuda, T. D. Kawahara, N. Saito, S. Oyama, S. Wada, T. Kawabata, H. Fujiwara, A. Brekke, A. Manson, C. Meek, and R. Fujii
Ann. Geophys. 32 巻 頁： 1195-1205 2014年10月
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Auroral fragmentation into patches 査読有り
Shiokawa, K., A. Hashimoto, T. Hori, K. Sakaguchi, Y. Ogawa, E. Donovan, E. Spanswick, M. Connors, Y. Otsuka, S.-I. Oyama, S. Nozawa, K. McWilliams
J. Geophys. Res. 119 巻 頁： 8249-8261 2014年9月
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Extreme ion heating in the dayside ionosphere in response to arrival of a coronal mass ejection on March 12, 2012 査読有り
Fujiwara, H., S. Nozawa, Y. Ogawa, R. Kataoka, Y. Miyoshi, H. Jin, and H. Shinagawa
Ann. Geophys. 32 巻 頁： 831-839 2014年7月
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Upper Atmosphere cooling over the past 33 years 招待有り 査読有り
Ogawa, Y., T. Motoba, S. C. Buchert, I. Häggström and S. Nozawa
Geophys. Res. Lett. 41 巻 頁： 5629-5635 2014年7月
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Variations of the neutral temperature and sodium density between 80 and 107 km above Tromso during the winter of 2010-2011 by a new solid state sodium LIDAR 査読有り
Nozawa, S., T. D. Kawahara, N. Saito, C. M. Hall, T. T. Tsuda, T. Kawabata, S. Wada, A. Brekke, T. Takahashi, H. Fujiwara, Y. Ogawa, and R. Fujii
Journal of Geophysical Research 119 巻 ( 1 ) 頁： 441-451 2014年1月
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Relationship between auroral substorm and ion upflow in the nightsidem polar ionosphere 査読有り
Ogawa, Y., M. Sawatsubashi, S. C. Buchert, K. Hosokawa, S. Taguchi, S. Nozawa, S. Oyama, T. T. Tsuda, and R. Fujii
J. Geophys. Res. 118 巻 頁： 7426-7437 2013年11月
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Estimation of the layered ionospheric conductance using data from a multi-wavelength photometer at the European Incoherent Scatter (EISCAT) radar site 査読有り
Oyama, S., T. Watanabe, R. Fujii, S. Nozawa, and T. T. Tsuda
Antarctic Record 57 巻 ( 3 ) 頁： 339-356 2013年11月
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Decrease in sodium density observed during auroral particle precipitation over Tromsø 査読有り
Tsuda, T., S. Nozawa, T. D. Kawahara, T. Kawabata, N. Saito, S. Wada, Y. Ogawa, S. Oyama, C. M. Hall, M. Tsutsumi, M. K. Ejiri, S. Suzuki, T. Takahashi, T. Nakamura
Geophys. Res. Lett. 40 巻 頁： 4486-4490 2013年8月
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Field-Aligned Current Loop Model on Formation of Sporadic Metal Layers, 査読有り
Matuura, N., T. Tsuda, and S. Nozawa
J. Geophys. Res. 118 巻 2013年6月
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Observation of nighttime medium-scale travelling ionospheric disturbances by two 630-nm airglow imagers near the auroral zone 査読有り
Shiokawa, K., M. Mori, Y. Otsuka, S. Oyama, S. Nozawa, S. Suzuki, and M. Connor
103 巻 頁： 184-194 2013年4月
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Development of low-cost sky-scanning Fabry-Perot interferometers for airglow and auroral studies 査読有り
Shiokawa, K., Y. Otsuka, S. Oyama, S. Nozawa, M. Satoh, Y. Katoh, Y. Hamaguchi, Y. Yamamoto and J. Meriwether
Earth Planets Space 64 巻 頁： 1033-1046 2012年11月
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Motion of high-latitude nighttime medium-scale traveling ionospheric disturbances associated with auroral brightening 査読有り
Shiokawa, K., M. Mori, Y. Otsuka, S. Oyama, and S. Nozawa
Journal of Geophysical Research 117 巻 ( A10 ) 頁： 2012JA017928 2012年10月
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Mean winds, tides, and quasi-2 day waves above Bear Island 査読有り
Nozawa, S., C.M. Hall, M. Tsutsumi, A. Brekke, Y. Ogawa, T. T. Tsuda, S. Oyama, R. Fujii
JASTP 90-91 巻 頁： 26-44 2012年5月