Published papers
Number of published data : 31
No. Classification Refereed paper Title Authorship Author Journal Volume/issue/page Publication date ISSN DOI URL
1 Paper
Yes
Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70 km altitude over Syowa (69ºS, 40ºE), the Antarctic

M. Kogure, T. Nakamura, M. K. Ejiri, T. Nishiyama, Y. Tomikawa, M. Tsutsumi, H. Suzuki, T. T. Tsuda, T. D. Kawahara, and M. Abo
J. Geophys. Res. Atmospheres
122, 7869-7880
2017

10.1002/2016JD026360

2 Paper
Yes
Statistical investigation of Na layer response to geomagnetic activity using resonance scattering measurements by Odin/OSIRIS

T. T. Tsuda, T. Nakamura, M. K. Ejiri, T. Nishiyama, K. Hosokawa, T. Takahashi, J. Gumbel, and J. Hedin
Geophys. Res. Lett.
44, 5943-5950
2017

10.1002/2017GL072801

3 Paper
Yes
Sodium temperature/wind lidar based on laser-diode-pumped Nd:YAG lasers deployed at Tromsø, Norway (69.6ºN, 19.2ºE)

T. D. Kawahara, S. Nozawa, N. Saito, T. Kawabata, T. T. Tsuda, and S. Wada
Opt. Express
25, A491-A501
2017

10.1364/OE.25.00A491

4 Paper
Yes
Depletion of mesospheric sodium during extended period of pulsating aurora

T. Takahashi, K. Hosokawa, S. Nozawa, T. T. Tsuda, Y. Ogawa, M. Tsutsumi, Y. Hiraki, H. Fujiwara, T. D. Kawahara, N. Saito, S. Wada, T. Kawabata, and C. Hall
J. Geophys. Res. Space Physics
122, 1212-1220
2017

10.1002/2016JA023472

5 Paper
Yes
Lower thermospheric wind variations in auroral patches during the substorm recovery phase

S.-i. Oyama, K. Shiokawa, Y. Miyoshi, K. Hosokawa, B. J. Watkins, J. Kurihara, T. T. Tsuda, and C. T. Fallen
J. Geophys. Res. Space Physics
121, 3564-3577
2016

10.1002/2015JA022129

6 Paper
Yes
A sporadic sodium layer event detected with five-directional lidar and simultaneous wind, electron density, and electric field observation at Tromsø, Norway

T. T. Tsuda, 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, 9190-9196
2015

10.1002/2015GL066411

7 Paper
Yes
A case study on generation mechanisms of a sporadic sodium layer above Tromsø (69.6ºN) during a night of high auroral activity

T. Takahashi, 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, 941-953
2015

10.5194/angeo-33-941-2015

8 Paper
Yes
A thermospheric Na layer event observed up to 140 km over Syowa Station (69.0ºS, 39.6ºE) in Antarctica

T. T. Tsuda, X. Chu, T. Nakamura, M. K. Ejiri, T. D. Kawahara, A. S. Yukimatu, and K. Hosokawa
Geophys. Res. Lett.
42, 3647-3653
2015

10.1002/2015GL064101

9 Paper
Yes
Height and time characteristics of seasonal and diurnal variations in PMWE based on 1 year observations by the PANSY radar (69.0ºS, 39.6ºE)

T. Nishiyama, K. Sato, T. Nakamura, M. Tsutsumi, T. Sato, M. Kohma, K. Nishimura, Y. Tomikawa, M. K. Ejiri, and T. T. Tsuda
Geophys. Res. Lett.
42, 2100-2108
2015

10.1002/2015GL063349

10 Paper
Yes
Variations of the neutral temperature and sodium density between 80 and 107 km above Tromsoe during the winter of 2010-2011 by a new solid state sodium LIDAR

S. Nozawa, 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
J. Geophys. Res. Space Physics
119, 441-451
2014

10.1002/2013JA019520

11 Paper
Yes
Height-dependent ionospheric variations in the vicinity of nightside poleward expanding aurora after substorm onset

S. Oyama, Y. Miyoshi, K. Shiokawa, J. Kurihara, T. T. Tsuda, and B. J. Watkins
J. Geophys. Res. Space Physics
119, 4146-4156
2014

10.1002/2013JA019704

12 Paper
Yes
A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data

T. Takahashi, 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, 1195-1205
2014

10.5194/angeo-32-1195-2014

13 Paper
Yes
Field-aligned current loop model on formation of sporadic metal layers

N. Matuura, T. Tsuda, and S. Nozawa
J. Geophys. Res. Space Physics
118, 4628-4639
2013

10.1002/jgra.50414

14 Paper
Yes
Layered conductance in the ionosphere estimated using data from a multi-wavelength photometer at the European Incoherent Scatter radar site

S. Oyama, T. Watanabe, R. Fujii, S. Nozawa, and T. T. Tsuda
Antarctic Record
57(3), 339-356
2013



15 Paper
Yes
Relationship between auroral substorm and ion upflow in the nightside polar ionosphere

Y. Ogawa, M. Sawatsubashi, S. C. Buchert, K. Hosokawa, S. Taguchi, S. Nozawa, S. Oyama, T. T. Tsuda, and R. Fujii
J. Geophys. Res. Space Physics
118, 7426-7437
2013

10.1002/2013JA018965

16 Paper
Yes
Decrease in sodium density observed during auroral particle precipitation over Tromsø, Norway

T. T. Tsuda, 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, and T. Nakamura
Geophys. Res. Lett.
40, 4486-4490
2013

10.1002/grl.50897

17 Paper
Yes
Large-scale data processing and visualization of the European incoherent scatter (EISCAT) radar system

Y. Ogawa, S. Nozawa, I. Haggstrom, S. Oyama, T. Motoba, T. Tsuda, A. Saito, Y. Miyashita, Y. Tanaka, G. Ueno, H. Miyaoka, and R. Fujii
Journal of Space Science Informatics Japan
1, 83-89
2012



18 Paper
Yes
Temporal variations of the ion-neutral collision frequency from EISCAT observations in the polar lower ionosphere during periods of geomagnetic disturbances

S. Oyama, J. Kurihara, B. Watkins, T. Tsuda, and T. Takahashi
J. Geophys. Res.
117, A05308-
2012

10.1029/2011JA017159

19 Paper
Yes
Mean winds, tides, and quasi-2day waves above Bear Island

S. Nozawa, C. M. Hall, M. Tsutsumi, A. Brekke, Y. Ogawa, T. Tsuda, S. Oyama, and R. Fujii
J. Atmos. Sol. Terr. Phys.
90-91, 26-44
2012

10.1016/j.jastp.2012.05.002

20 Paper
Yes
Meso-scale observations of Joule heating near an auroral arc and ion-neutral collision frequency in the polar cap E-region

M. J. Kosch, I. Yiu, C. Anderson, T. Tsuda, Y. Ogawa, S. Nozawa, A. Aruliah, V. Howells, L. J. Baddeley, I. W. McCrea, and J. A. Wild
J. Geophys. Res.
116, A05321-
2011

10.1029/2010JA016015

21 Paper
Yes
Variance of the vertical ion speed measured with the European Incoherent Scatter (EISCAT) UHF radar in the polar lower ionosphere at Tromsø, Norway

S. Oyama, A. Brekke, T. T. Tsuda, J. Kurihara, and B. J. Watkins
J. Geophys. Res.
116, A00K06-
2011

10.1029/2010JA016129

22 Paper
Yes
Fine structure of sporadic sodium layer observed with a sodium lidar at Tromsø, Norway

T. T. Tsuda, S. Nozawa, T. D. Kawahara, T. Kawabata, N. Saito, S. Wada, C. M. Hall, S. Oyama, Y. Ogawa, S. Suzuki, T. Ogawa, T. Takahashi, H. Fujiwara, R. Fujii, N. Matuura, and A. Brekke
Geophys. Res. Lett.
38, L18102-
2011

10.1029/2011GL048685

23 Paper
Yes
Tidal waves in the polar lower thermosphere observed using the EISCAT long run data set obtained in September 2005

S. Nozawa, Y. Ogawa, S. Oyama, H. Fujiwara, T. Tsuda, A. Brekke, C. M. Hall, Y. Murayama, S. Kawamura, H. Miyaoka, and R. Fujii
J. Geophys. Res.
115, A08312-
2010

10.1029/2009JA015237

24 Paper
Yes
Lower-thermospheric wind fluctuations measured with an FPI during pulsating aurora at Tromsø, Norway

S. Oyama, K. Shiokawa, J. Kurihara, T. T. Tsuda, S. Nozawa, Y. Ogawa, Y. Otsuka, and B. J. Watkins
Ann. Geophys.
28, 1847-1857
2010

10.5194/angeo-28-1847-2010

25 Paper
Yes
Acceleration mechanism of high-speed neutral wind observed in the polar lower thermosphere

T. T. Tsuda, S. Nozawa, S. Oyama, T. Motoba, Y. Ogawa, H. Shinagawa, N. Nishitani, K. Hosokawa, N. Sato, M. Lester, and R. Fujii
J. Geophys. Res.
114, A04322-
2009

10.1029/2008JA013867

26 Paper
Yes
Spatial evolution of frictional heating and the predicted thermospheric-wind effects in the vicinity of an auroral arc measured with the Sondrestrom incoherent-scatter radar and the Reimei satellite

S. Oyama, T. T. Tsuda, T. Sakanoi, Y. Obuchi, K. Asamura, M. Hirahara, A. Yamazaki, Y. Kasaba, R. Fujii, S. Nozawa, and B. J. Watkins
J. Geophys. Res.
114, A07311-
2009

10.1029/2009JA014091

27 Paper
Yes
Ion heating in high-speed flow channel within the duskside cell of the polar-cap ion convection under large IMF-By condition

S. Maeda, Y. Ogawa, K. Hosokawa, S. Nozawa, S. Oyama, T. Tsuda, and A. Brekke
J. Geophys. Res.
114, A11307-
2009

10.1029/2009JA014300

28 Paper
Yes
Temperature enhancements and vertical winds in the lower thermosphere associated with auroral heating during the Dynamics and Energetics of the Lower Thermosphere in Aurora (DELTA) campaign

J. Kurihara, S. Oyama, S. Nozawa, T. Tsuda, R. Fujii, Y. Ogawa , H. Miyaoka, N. Iwagami, T. Abe, K.-I. Oyama, M. Kosch , A. L. Aruliah, E. Griffin, and K. Kauristie
J. Geophys. Res.
114, A12306-
2009

10.1029/2009JA014392

29 Paper
Yes
The Pedersen current carried by electrons: a non-linear response of the ionosphere to magnetospheric forcing

S. C. Buchert, T. Tsuda, R. Fujii, and S. Nozawa
Ann. Geophys.
26, 2837-2844
2008



30 Paper
Yes
An ion drag contribution to the lower thermospheric wind in summer polar region

T. T. Tsuda, S. Nozawa, A. Brekke, Y. Ogawa, T. Motoba, R. Roble, and R. Fujii
J. Geophys. Res.
112, A06319-
2007

10.1029/2006JA011785

31 Paper
Yes
EISCAT observational results during the DELTA campaign

S. Nozawa, Y. Ogawa, A. Brekke, T. Tsuda, C. M. Hall, H. Miyaoka, J. Kurihara, T. Abe, and R. Fujii
Earth Planets Space
58, 1183-1191
2006