Oyama, S., Y. Miyoshi, K. Shiokawa, J.
Kurihara, T. T. Tsuda, and B. J. Watkins, Height-dependent ionospheric
variations in the vicinity of nightside poleward expanding aurora after
substorm onset, accepted in J. Geophys. Res., doi:10.1029/2013JA019704, May
5, 2014.
Oyama, S., T. Watanabe, R. Fujii, S.
Nozawa1, and T. T. Tsuda, Estimation of the layered ionospheric
conductance using data from a multi-wavelength photometer at the European
Incoherent Scatter (EISCAT) radar site, Antarctic Record, 57(3), 339-356,
December, 2013.
Oyama, S., J. Kurihara, B. J. Watkins,
T. T. Tsuda, and T. Takahashi, Temporal variations of the ion-neutral
collision frequency from EISCAT observations in the polar lower ionosphere
during periods of geomagnetic disturbances, J. Geophys. Res., 117, A05308,
doi:10.1029/2011JA017159, March, 2012.
Oyama, S., and B. J. Watkins,
Generation of atmospheric gravity waves in the polar thermosphere in
response to auroral activity, Space Science Review,
doi:10.1007/s11214-011-9847-z, November, 2011.
Oyama, S., A. Brekke, T. T. Tsuda, J.
Kurihara, and B. J. Watkins, Variance of the vertical ion speed measured
with the EISCAT UHF radar in the polar lower ionosphere at Tromsoe,
Norway, J. Geophys. Res., 116,
A00K06, doi:10.1029/2010JA016129, July, 2011.
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 during
pulsating aurora at Tromsoe, Norway, Ann. Geophysicae, 28, 1847-1857,
2010.
Oyama, S., T. T. Tsuda, T. Sakanoi, Y.
Obuchi, K. Asamura, M. Hirahara, A. Yamazaki, Y. Kasaba, R. Fujii, S.
Nozawa, and B. J. Watkins, 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, J. Geophys. Res., 114, A07311, doi:10.1029/2009JA014091, 2009.
Oyama, S., B. J. Watkins, S. Maeda, H.
Shinagawa, S. Nozawa, Y. Ogawa, A. Brekke, C. Lathuillere, and W. Kofman,
Generation of the lower-thermospheric vertical wind estimated with the
EISCAT KST radar at high latitudes during periods of moderate geomagnetic
disturbance, Ann. Geophysicae, 26, 1491-1505, 2008.
Oyama, S., B. J. Watkins, F. T. Djuth,
M. J. Kosch, P. Bernhardt, and C. J. Heinselman,Persistent enhancement of
the HF pump-induced plasma line measured with a UHF diagnostic radar at
HAARP, J. Geophys. Res., 111, A06309, doi:10.1029/2005JA011363, 2006.
Oyama, S., B. J. Watkins, S. Nozawa,
S. Maeda, and M. Conde, Vertical ion motions observed with
incoherent-scatter radars in the polar lower ionosphere, J. Geophys. Res.,
110, A04302, doi:10.1029/2004JA010705, 2005.
Oyama, S., B. J. Watkins, S. Maeda,
and J. Watermann, Application of a new beam configuration to estimate
lower thermospheric vertical velocities at high latitudes with mono-static
incoherent scatter radars, Radio Sci., 40, RS4005,
doi:10.1029/2004RS003205, 2005.
Oyama, S., C. Lathuillere, S. Maeda,
and B. J. Watkins, Summer-winter dependences of day-night differences in
the ion temperature in the polar upper F region, Geophys. Res. Lett., 31,
L05806, doi:10.1029/2003GL018820, 2004.
Oyama, S., S. Nozawa, S. Maeda, Y.
Murayama, R. Fujii, and H. Shinagawa, Field-aligned ion motions in the
polar E-F transition region: Mean characteristics, J. Geophys. Res.,
108(A8), 1334, doi:10.1029/2003JA009830, 2003.
Oyama, S., M. Ishii, Y. Murayama, H.
Shinagawa, S. C. Buchert, S. Nozawa, R. Fujii, and W. Kofman, Generation
of atmospheric gravity waves associated with auroral activity in the polar
F region, J. Geophys. Res., 106, 18,543-18,554, 2001.
Oyama, S., H. Shinagawa, S. C.
Buchert, R. Fujii, S. Nozawa, M. Ishii, Y. Murayama, and W. Kofman, Effects
of auroral arc on the generation of atmospheric gravity waves in the
auroral F-region, Advances in Space Research, 27, 1767-1772, 2001.
Oyama, S., S. Nozawa, S. C. Buchert,
M. Ishii, S. Watari, E. Sagawa, W. Kofman, J. Lilensten, and R. Fujii,
Effects of atmospheric oscillations on the field-aligned ion motions in
the polar F-region, Ann., Geophysicae, 18, 1154-1163, 2000.
共著論文
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, Decrease in
sodium density observed during auroral particle precipitation over Tromsø,
Norway, GRL, 40, DOI: 10.1002/grl.50897, 2013.
Shiokawa, K., M. Mori, Y. Otsuka, S.
Oyama, S. Nozawa, S. Suzuki, and M. Connors, Observation of nighttime
medium-scale travelling ionospheric disturbances by two 630-nm airglow
imagers near the auroral zone, J. Atmos. Solar-Terr. Phys., 103, 184-194,
Sep., 2013.
Shiokawa, K., M. Mori, Y. Otsuka, S.
Oyama, and S. Nozawa, Motion of high-latitude nighttime medium-scale
traveling ionospheric disturbances associated with auroral brightening, J.
Geophys. Res., 117, A10316, doi:10.1029/2012JA017928, Oct., 2012.
Nozawa, S., C. M. Hall, M. Tsutsumi, A.
Brekke, Y. Ogawa, T. T. Tsuda, S. Oyama, and R. Fujii, Mean winds, tides,
and quasi-2 day waves above Bear Island, J. Atmos. Solar-Terr. Phys., doi:
10.1016/j.jastp.2012.05.002, Jun, 2012.
Shiokawa, K., Y. Otsuka, S. Oyama, S.
Nozawa, M. Satoh, Y. Katoh, Y. Hamaguchi, Y. Yamamoto, and J. Meriwether,
Development of low-cost sky-scanning Fabry-Perot interferometers for
airglow and auroral studies, Earth Planets Space, in press, May, 2012.
Tsuda, T. T., S. Nozawa, T. Kawahara,
T. Kawabata, N. Saito, S. Wada, C. Hall, S. Oyama, Y. Ogawa, S. Suzuki, T.
Ogawa, T. Takahashi, H. Fujiwara, R. Fujii, N. Matuura, and A. Brekke,
Fine structure of sporadic sodium layer observed with a sodium lidar at
Tromsø, Norway, Geophys. Res. Lett., 38, L18102, doi:10.1029/2011GL048685,
August, 2011.
Kurihara, J., Y. Ogawa, S. Oyama, S.
Nozawa , M. Tsutsumi , C. Hall , Y. Tomikawa , 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., 37, L13806, doi:10.1029/2010GL043643, 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. Geophy.
Res., 115, A08312, doi:10.1029/2009JA015237, 2010.
Fujii, R., Y. Iwata, S. Oyama, S.
Nozawa, and Y. Ogawa, Relations between proton auroras, intense electric
field and ionospheric electron density depletion, J. Geophys. Res.,
A09304, doi:10.1029/2009JA01431, 2009.
Tsuda, T. T., S. Nozawa, S. Oyama, T.
Motoba, Y. Ogawa, H. Shinagawa, N. Nishitani, K. Hosokawa, N. Sato, M.
Lester, and R. Fujii, Acceleration mechanism of high-speed neutral wind
observed in the polar lower thermosphere, J. Geophys. Res., 114, A04322,
doi:10.1029/2008JA013867, 2009.
Maeda, S., Y. Ogawa, K. Hosokawa, S.
Nozawa, S. Oyama, T. Tsuda and A. Brekke, Ion heating in high-speed flow
channel within the duskside cell of the polar-cap ion convection under
large IMF-By condition, J. Geophys. Res., A11307,
doi:10.1029/2009JA014300, 2009.
Kurihara, J., S. Oyama, S. Nozawa, T.
T. Tsuda, R. Fujii, Y. Ogawa, H. Miyaoka, N. Iwagami, T. Abe, K.-I. Oyama,
M. Kosch, A. Aruliah, E. Griffin, and K. Kauristie, 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. Geophys. Res., A12306 doi:10.1029/2009JA014392,
2009.
Kosch M. J., T. Pedersen, E. Mishin,
S. Oyama, J. Hughes, A. Senior, B. Watkins, B. Bristow, Coordinated
optical and radar observations of ionospheric pumping for a frequency pass
through the second electron gyroharmonic at HAARP, J. Geophys. Res., 112,
A06325, doi:10.1029/2006JA012146, 2007.
Kosch M. J., T. Pedersen, E. Mishin,
M. Starks, E. Gerken-Kendall, D. Sentman, S. Oyama, B. Watkins, Temporal
evolution of pump beam self-focusing at the High-Frequency Active Auroral
Research Program, J. Geophys. Res., 112, A08304, doi:10.1029/2007JA012264,
2007.
Shinagawa, H., and Oyama, S., A
two-dimensional simulation of thermospheric vertical winds in the vicinity
of an auroral arc, Earth Planets and Space, 58(9), 1173-1181, 2006.
Shinagawa, H., S. Oyama, S. Nozawa, S.
C. Buchert, R. Fujii, and M. Ishii, Thermospheric and ionosphric dynamics
in the auroral region, Advances in Space Research, 31(4), 951-956, 2003.
Nozawa, S., S. Imaida, A. Brekke, C.
Hall, C. Meek, A. Manson, S. Oyama, K. Dobashi, and R. Fujii, The quasi
2-day wave observed in the polar mesosphere, J. Geophys. Res., 108,
10.1029/2002JD002440, 2003.
Nozawa, S., H. Iwahashi, A. Brekke, C.
M. Hall, C. Meek, A. Manson, S. Oyama, Y. Murayama, and R. Fujii, The
quasi 2-day wave observed in the polar mesosphere (2): Comparison of the
characteristics observed at Tromso and Poker Flat, J. Geophys. Res., 108 ,
101029/2002JD003221, 2003.
Fujii, R., S. Oyama, S. C. Buchert, S.
Nozawa, and N. Matuura, Field-aligned ion motions in the E and F region,
J. Geophys. Res., 107, 10.1029/ 2001JA900148, 2002.
Nozawa, S., A. Brekke, A. Manson, C.
M. Hall, C. Meek, K. Morise, S. Oyama, K. Dobashi, and R. Fujii, A
comparison study of the auroral lower thermopsheric neutral winds derived
by the EISCAT UHF radar and the Tromso radar, J. Geophys. Res., 107,
10.1029/2000JA007581, 2002.
Ishii, M., S. Oyama, S. Nozawa, R.
Fujii, E. Sagawa, S. Watari, and H. Shinagawa, Dynamics of neutral wind in
the polar region observed with two Fabry-Perot interferometers, Earth
Planets Space, 51, 833-844, 1999.
誌上発表論文(査読無)
Tsuda, T. T., S. Nozawa, T. D.
Kawahara, T. Kawabata, S. Oyama, R. Fujii, Y. Ogawa, N. Saito, S. Wada, A.
Brekke, and C. M. Hall, A sodium lidar project at Tromsø, Norway: First
report on test observations at Wako, Japan, CAWSES-II Kickoff Symposium in
Japan, Proceedings,121-124, 2010.
Oyama, S., S. Nozawa, R. Fujii, K.
Shiokawa, Y. Otsuka, and T. T. Tsuda, Optical instruments of STEL, Nagoya University
at the EISCAT radar site in Tromsø, Norway, CAWSES-II Kickoff Symposium in
Japan, Proceedings, 113-116. 2010.
Ogawa, Y., and EISCAT Japan project
team, Long-term variations of the polar ionosphere and thermosphere
observed with European Incoherent Scatter (EISCAT) radars, CAWSES-II
Kickoff Symposium in Japan, Proceedings, 76-78, 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, CAWSES-II
Kickoff Symposium in Japan, Proceedings, 51-52, 2010.
Nozawa, S., Y. Ogawa, S. Oyama, H.
Miyaoka, T. Kawahara, T. T. Tsuda, and M. Tsutsumi, Research on the lower
thermosphere and mesosphere using EISCAT radars, and other instruments,
CAWSES-II Kickoff Symposium in Japan, Proceedings, 46-48, 2010.
大山伸一郎, B. J. Watkins, HAARP
(High Frequency Active Auroral Research Program)サイトにおけるMUIR (Modular UHF Ionospheric Radar)で観測された電離圏擾乱, 情報通信研究機構季報, 53(1/2), 95-102, 2007.
Oyama, S., Y. Murayama, M. Ishii, M.
Kubota Development of SALMON system and the environment data transfer
experiment, Journal of Communications Research Laboratory, in press, 2002.
Oyama, S., Small-scale thermospheric
wind dynamics at high latitudes, STEL-KASI workshop, Nagoya, October 2010.
Oyama, S., S. Nozawa, R. Fujii, K.
Shiokawa, Y. Otsuka, and T. T. Tsuda, Report of the STEL optical
observation at the northern Scandinavia by March 2010, Japan Geoscience
Union Meeting 2010, Makuhari, May 2010.
Oyama, S., S. Maeda, H. Shinagawa, and
B. J. Watkins, Vertical motions in the polar lower
thermosphere/ionosphere: Recent results from the incoherent-scatter radar,
GSSS-2007, Greenland, May 2007.
IARC(左)とGI UAF(右)
名古屋大学太陽地球環境研究所
国際学会発表
S. Oyama, Shiokawa K., Suzuki S.,
Nozawa S., Otsuka Y., Tsutsumi M., Hall C. M., Meek C., and Manson A.,
Characteristics of the mesospheric gravity wave observed with an all-sky
camera at Tromsoe, Norway in 2009-2010, The 4thIAGA/ICMA/CAWSES-II TG4
Workshop, Prague, Czech, February 2011.
K. Shiokawa, M. Mori, D. Fukushima, Y.
Otsuka, S. Oyama, S. Nozawa, M. G. Connors, Gravity waves and
instabilities in the ionosphere imaged by the Optical Mesosphere
Thermosphere Imagers (OMTIs), 2010 AGU Fall Meeting, San Francisco,
December 2010.
M. Mori, K. Shiokawa, S. Oyama, Y.
Otsuka, S. Nozawa, M. G. Connors, Study of auroral-zone MSTIDs using 630nm
airglow images at Tromsoe, Norway and Athabasca, Canada, 2010 AGU Fall
Meeting, San Francisco, December 2010.
S. Oyama, K. Shiokawa, S. Suzuki, S.
Nozawa, Y. Otsuka, M. Tsutsumi, C. M. Hall, C. Meek, and A. H. Manson,
Propagation direction of the nighttime mesospheric gravity waves in the OH
airglow images at Tromsø, Norway in winter 2009, 2010 AGU Fall Meeting,
San Francisco, December 2010.
T. T. Tsuda, S. Nozawa, T. Kawahara,
T. Yamasaki, S. Oyama, R. Fujii, Y. Ogawa, N. Saito, S. Wada, A. Brekke,
and C. M. Hall, A sodium lidar project at Tromsø, Norway: First report on
test observations at Wako, Japan and current status, 2010 AGU Fall
Meeting, San Francisco, December 2010.
A. Aruliah, H.-C.I. Yiu., I.McWhirter,
M.J. Kosch, K. Shiokawa, S. Oyama, S. Nozawa, V. Howells, I. McCrea,
Determining the 630nm emission altitude using modelling and observations
from a tristatic configuration of Fabry-Perot Interferometers and EISCAT
radars, 38th COSPAR Scientific Assembly 2010, Bremen, Germany, July, 2010.
J. Kurihara, S. Oyama, S. Nozawa, and
R. Fujii, M. Tsutsumi, Y. Ogawa, and Y. Tomikawa, C. Hall, Impacts of a
stratospheric sudden warming on thermal structures in the high-latitude
mesosphere, lower thermosphere, and ionosphere, 38th COSPAR Scientific
Assembly 2010, Bremen, Germany, July, 2010.
S. Oyama, Kazuo Shiokawa, Satonori
Nozawa, Yuichi Otsuka, Masaki Tsutsumi, Shin Suzuki, Chris M. Hall, Chris
Meek, and Alan Manson, Propagation characteristics of nighttime
mesospheric waves observed with an all-sky camera at Tromsoe, Norway in
2009-2010, 38th COSPAR Scientific Assembly 2010, Bremen, Germany, July,
2010.
K. Shiokawa, Jens Oberheide, A.
Hertzog, Amit K. Patra, Alan Manson, Anasuya Arulia, Anne Smith, Anthea
Coster, Anto-nia Haser, Archana Bhattacharya, Art Richmond, Babatunde
Rabiu, Barclay Clemesha, Bernd Funke, Bob Vincent, Carlos Martinis, Ceser
La Hoz, Charles Lin, Chris Hall, Christian von Savigny, Christiano Garnett
Marques Brum, Christina Arras, Christos Haldoupis, Duggirala Pallamraju,
Damian Murphy, Dave Fritts, David Hysell, Dora Pancheva, Elsayed Talaat,
Erich Becker, Esayas Shume, Esphan Alam Kherani, Gang Lu, Gerald
Lehmacher, Guiping Liu, Hanli Liu, Hermann Luhr, Hiroyuki Shinagawa, Hisao
Takahashi, Hitoshi Fujiwara, Huigen Yang, Huixin Liu, Inez S. Batista,
Jorge L. Chau, Je Forbes, Jiang Guoying, Jiyao Xu, Joan Alexander,
Jonathan Makela, Kaoru Sato, Larisa Goncharenko, Lee-Anne McKinnell, Libo
Liu, Ludger Scherliess, Mark Conde, Mamoru Yamamoto, Manfred Ern,
Mangalathayil A. Abdu, Manuel Lopez-Puertas, Markus Rapp, Maura Hagan,
Michael Rietveld, Miguel Larsen, Mike Kosch, Mike Nicholls, Mike Taylor,
Nanan Balan, Nikolai Gavrilov, Nick Mitchell, Peter Dyson, Peter Ho mann,
Peter Preusse, Petra Koucka Knizova (Sauli), Plamen Mukhtarov, Qian Wu,
Ricardo Buriti, Ruiyuan Liu, Ruth Lieberman, S. Gurubaran, Satonori
Nozawa, Shin-ichiro Oyama, Scott England, Scott Palo, Sean Bruinsma,
Sergey Shalimov, Sheila Kirkwood, T. K. Ramkumar, Takuya Tsugawa, Takashi
Maruyama, Takuji Nakamura, Tao Li, Tiger Liu, Tom Immel, Toshitaka Tsuda,
Ulrich Achatz, Weixing Wan, Werner Singer, William Ward, Yuichi Otsuka,
Yogeshwar Sahai, and Yue Deng, CAWSES-II TASK GROUP 4: WHAT IS THE
GEOSPACE RESPONSE TO VARIABLE INPUTS FROM THE LOWER ATMOSPHERE?, 38th
COSPAR Scientific Assembly 2010, Bremen, Germany, July, 2010.
S. Oyama, Small-scale auroral GW
observation, ISSI Earth Science Workshop, Bern, Switzerland, September
2010.
S. Oyama, Small-scale thermospheric
wind dynamics at high latitudes, STEL-KASI workshop, Nagoya Japan, October
2010.
Otsuka, Y., K. Shiokawa, S. Oyama, M.
Satoh, Y. Katoh, Y. Hamaguchi, Y. Yamamoto, S. Nozawa, T. Ogawa, J. W.
Meriwether, Development of four Fabry-Perot interferometers for
measurements of thermospheric wind and temperature, 2009 AGU Fall meeting,
San Francisco, 2009.
Sheerin, J. P., N. Adham, J. M. Gerres,
M. R. Keith, A. C. Wittbrodt, B. J. Watkins, W. A. Bristow, P. A.
Bernhardt, C. A. Selcher, S. Oyama, Studies of Strong Langmuir Turbulence
Experiments at HAARP, 2009 AGU Fall meeting, San Francisco, 2009.
Kurihara, J., S. Oyama, S. Nozawa, R.
Fujii, Y. Ogawa, N. Iwagami, T. Abe, M. F. Larsen, M. Yamamoto, and S.
Watanabe, DELTA-2 CAMPAIGN: Coordinated sounding rocket and ground-based
observations of the dynamics and energetics in the polar lower
thermosphere, 19th ESA Symposium on European Rocket and Balloon Programmes
and Related Research, Germany, 2009.
Kurihara, J., S. Oyama, S. Nozawa, R.
Fujii, Y. Ogawa, N. Iwagami, T. Abe, M. Yamamoto, S. Watanabe, T.
Yokoyama, S. Nanbu, K. Yoshida, and M. F. Larsen, DELTA-2 Campaign:
Coordinated Observations of the Dynamics and Energetics in the Polar Lower
Thermosphere, Asia Oceania Geosciences Society, Singapore, 2009.
Oyama, S., S. Nozawa, R. Fujii, and T.
T. Tsuda, Estimation of the layered ionospheric conductance using data
taken with the multi-wavelength photometer and the EISCAT UHF radar, 14th
International EISCAT workshop, 2009.
Oyama, S., K. Shiokawa, J. Kurihara,
S. Nozawa, T. T. Tsuda, Y. Koizumi-Kurihara, Y. Otsuka, M. Tsutsumi, C. M.
Hall, C. Meek, and A. Manson, Initial reports of DELTA-2 campaign: tides
measured with FPI, MF radar, and meteor radar, 14th International EISCAT
workshop, 2009.
Oyama, S., K. Shiokawa, J. Kurihara,
S. Nozawa, T. T. Tsuda, R. Fujii, and Y. Otsuka, Initial reports of
DELTA-2 campaign: results from FPI and all-sky cameras, 14th International
EISCAT workshop, 2009.
Kurihara, J., S. Oyama, S. Nozawa, R.
Fujii, Y. Ogawa, N. Iwagami, T. Abe, M. F. Larsen, M. Yamamoto, Y.
Yokoyama, S. Watanabe, S. Nanbu, and K. Yoshida, Initial reports of
DELTA-2 campaign: overview of the Dynamics and Energetics of the Lower
Thermosphere in Aurora 2 campaign, 14th International EISCAT workshop,
2009.
Nozawa, S., Oyama, S., Y. Ogawa, J.
Kurihara, M. Tsutsumi, and R. Fujii, Initial reports of DELTA-2 campaign:
results from the EISCAT radar observations, 14th International EISCAT
workshop, 2009.
Tsuda, T. T., S. Nozawa, S. Oyama, Y.
Ogawa, Statistical study of high-speed neutral winds in the lower
thermosphere based on EISCAT Svarlbard radar observations, 14th
International EISCAT workshop, 2009.
Kurihara-Koizumi, Y., S. Nozawa, S.
Oyama, R. Fujii, S. Kawamura, Y. Murayama, and C. Hall, Characteristics of
atmospheric tidal wave in the polar mesosphere observed with two MF radars
at Tromsø and Poker Flat over 10 years, 14th International EISCAT
workshop, 2009.
Oyama, S. and B. J. Watkins, Aspect
sensitivity of the first 100 ms HF-modification measured with the MUIR at
HAARP, 13th EISCAT workshop, 2007.
Oyama, S., S. Maeda, H. Shinagawa, and
B. J. Watkins, Physical mechanism to generate vertical motions in the
polar lower thermosphere, 13th EISCAT workshop, 2007.
Fujii, R., H. Handa, S. Nozawa, and S.
Oyama, Dependence of the electromagnetic and precipitating particle energy
inputs to the ionosphere upon the sunlit/shade condition of the ionosphere,
13th EISCAT workshop, 2007.
T. T. Tsuda, S. Nozawa, S. Oyama, T.
Motoba, Y. Ogawa, H. Shinagawa, R. Fujii, The Neutral Wind in the Polar
Lower Thermosphere Observed during the Strong Ionospheric Convection,
International CAWSES Symposium, 2007.
J. Kurihara, S. Oyama, S. Nozawa, R.
Fujii, Y. Ogawa, N. Iwagami, T. Abe, DELTA Campaign: Coordinated Rocket
and Ground-based Observations, International CAWSES Symposium, 2007.
S. Maeda, Y. Ogawa, S. Nozawa, S.
Oyama, K. Hosokawa, A. Brekke, Ion Heating within an Enhanced Westward
Convection Channel in the Dusk-side Ionosphere, International CAWSES
Symposium, 2007.
S. Oyama, T. Watanabe, R. Fujii, S.
Nozawa, Estimation of the Polar Ionospheric Conductance Using Data from
the EISCAT Radar and the Multi-wavelengths Photometer, International
CAWSES Symposium, 2007.
J. P. Sheerin, Gerres, J M, Bacon, M
E, Watkins, B J., Bristow, W A., Turnquist, J E, Oyama, S I, Heinselman, C
J, UHF and HF Radar Studies of Langmuir Turbulence Experiments at HAARP,
AGU Fall Meeting, 2007.
S. Oyama, and B. J. Watkins, Aspect
angle dependency of the HF modification measured with MUIR at HAARP, AGU
Fall Meeting, 2007.
Oyama, S., B. J. Watkins, R. T.
Parris, and C. J. Heinselman, Initial high-range resolution results using
MUIR at HAARP, RF Ionospheric Interaction Workshop, 2006.
B. J. Watkins, S. Oyama, R. T. Parris,
and C. J. Heinselman, Enhanced ion-line data from MUIR experiments at
HAARP: Spectral asymmetries, RF Ionospheric Interaction Workshop, 2006.
Oyama, S., B. J. Watkins, and F. T.
Djuth, HF induced plasma lines measured with the HAARP AMISR during
January/February 2005 campaign, RF ionospheric interaction workshop, 2005.
Oyama, S., B. J. Watkins, S. Maeda, S.
Nozawa, C. Lathuillere, and W. Kofman, Methodology for estimation of the
lower thermospheric wind with the incoherent-scatter radar, CEDAR
workshop, 2005.
Oyama, S., B. J. Watkins, S. Nozawa,
S. Maeda, and J. Watermann, Initial results of the lower thermospheric
vertical wind estimated with incoherent-scatter radars at high latitudes,
AGU Fall meeting, 2004.
Oyama S., B. J. Watkins, and F. T.
Djuth, Proposed future experimental plans using AMISR and VHF diagnostic
radars at HAARP, RF Ionospheric Interaction Workshop, 2004.
Oyama S., C. Lathuillere, S. Maeda, and
B. J. Watkins, Ion temperature climate in the polar ionosphere using
incoherent-scatter radars, AGU Fall meeting, 2003.
Oyama S., B. J. Watkins, S. Maeda, and
H. Shinagawa, Ion temperature maximum appeared in the polar E-F
transition, CEDAR workshop, 2003.
Nozawa, S., H. Iwahashi, Oyama S., Y.
Murayama, A. Brekke, C. M. Hall, A. Manson, C. Meek, and R. Fujii, Mean
wind and atmospheric tide observed at Tromsoe and Poker Flat, CEDAR
workshop, 2003.
Oyama, S., C. Lathuillere, S. Maeda, and
B. J. Watkins, Effects of the ion composition ratio on the ion temperature
in the polar E-F transition region, 11th EISCAT workshop, 2003.
Adachi, K., R. Fujii, S. Nozawa, Y.
Ogawa, T. Yamaguchi, S. Oyama, A. Brekke, C. Hall, and T. Ono, A
comparison between energy parameters of precipitating electrons derived
with the EISCAT UHF radar and a multi-wavelengths photometer, 11th EISCAT
workshop, 2003.
Nozawa, S., H. Iwahashi, A. Brekke, C.
Hall, A. Manson, C. Meek, S. Oyama, Y. Murayama, M. Hagan, and R. Fujii,
Mean winds and atmospheric tides observed at Tromsoe and Poker Flat, 11th
EISCAT workshop, 2003.
Oyama S., S. Nozawa, S. Maeda, Y.
Murayama, R. Fujii, and H. Shinagawa, Field-aligned Ion Motions in the
Transient Region between Polar Ionospheric E- and F-regions, AGU Fall
Meeting, 2002.
Shinagawa, H., and S. Oyama, MESOSCALE
DYNAMICS ASSOCIATED WITH AURORAL ACTIVITIES IN THE POLAR THERMOSPHERE,
COSPAR, 2002.
Murayama, Y., M. Ishii, M. Kubota, H.
Mori, S. Oyama, K. Igarashi, Collaboration between the RAO and CRL
instrumentation at Poker Flat, 2001 CEDAR-SCOSTEP workshop, 2001.
Oyama, S., T. Ogawa, M. Ishii, S.
Nozawa, R. Fujii, S. Watari, E. Sagawa, and W. Kofman, Relations between
GWs and TIDs simultaneously observed with the EISCAT radar and a scanning
FPI (630.0 nm), The 10th International EISCAT Workshop, July, 2001.
Ishii, M., S. Oyama, S. Nozawa, R.
Fujii, M. Conde, R. W. Smith, M. Krynicki, E. Sagawa and S. Watari,
Neutral Dynamics near Auroras Deduced From Fabry-Perot Interferometers at
Ramfjordmoen and Poker Flat, The 10th International EISCAT Workshop, July,
2001.
Murayam, Y., S. Oyama, W. Singer, and
K. Igarashi, Comparative observation of mesospheric waves with MF radars
at Poker Flat and Andenes, The 10th International EISCAT Workshop, July,
2001.
Adachi, K., R. Fujii, S. Nozawa, T.
Yamaguchi, S. Oyama, A. Brekke, and C. Hall, Derivation of the energy
spectrum of precipitating electrons using EISCAT and multi-wavelengths
photometer observations, The 10th International EISCAT Workshop, July,
2001.
Oyama, S., M. Ishii, H. Shinagawa, M.
Kubota, and Y. Murayama, Vertical winds observed with FPI in the auroral
thermosphere in association with auroral activities, AP-RASC, August,
2001.
Oyama, S., H. Shinagawa, S. C.
Buchert, R. Fujii, S. Nozawa, M. Ishii, Y, Murayama, and W. Kofman,
Effects of ionospheric heating on the neutral motions associated with an
auroral arc, 33rd COSPAR, Warsaw, Poland, July, 2000.
Shinagawa, H., S. Nozawa, S. C.
Buchert, R. Fujii, M. Ishii, and S. Oyama, Thermospheric and ionospheric
dynamics in the auroral region, 33rd COSPAR, Warsaw, Poland, July, 2000.
Oyama, S., M. Ishii, H. Shinagawa, Y.
Murayama, M. Kubota, S. Nozawa, and R. Fujii, Effects of thermal expansion
on neutral vertical motions in the polar thermosphere, The first S-RAMP
conference, Sapporo, October, 2000.
Shinagawa, H., S. Oyama, M. Ishii, S.
Nozawa, and R. Fujii, Thermosphere and ionosphere dynamics in the auroral
region, The first S-RAMP conference, Sapporo, October, 2000.
Oyama, S., S. Nozawa, S. C. Buchert,
R. Fujii and M. Ishii, Effects of atmospheric oscillations on the
filed-aligned ion motions in the polar F-region, The 9th International
EISCAT Workshop, September, 1999.
Ishii, M., S. Oyama, S. Nozawa, and R.
Fujii, Neutral wind observations on EISCAT-FPI campaign, International
Symposium on Dynamics and structure of the Mesopause Region, March, 1998.
Ishii, M., S. Oyama, S. Nozawa, and R.
Fujii, Neutral wind dinamics near auroral arc deduced from EISCAT-FPI
campaign results, the 32nd COSPAR, July, 1998.
Ishii, M., E. Sagawa, S. Watari, S.
Oyama, S. Nozawa, and R. Fujii, Comparison Between Neural and Ion
Velosoties in the Polar Thermosphere, AGU Fall meeting, December, 1998.
Oyama, S., T. Imai, S. Nozawa, R.
Fujii, S. C. Buchert, M. Ishii, H. Mori, and I. Iwamoto, The simultaneous
observations of the thermospheric neutral winds with FPIs and EISCAT
radars in January and February, 1997, The 8th International EISCAT
Workshop, June, 1997.
Ishii, M., Nozawa, S., S. Oyama, S.
Okano, and R. Fujii, Wind structures near auroral arc deduced from
observations of two different wave length emissions with FPI, The 8th
International EISCAT Workshop, June, 1997.
Ishii, M., S. Nozawa, S. Oyama,
Spatial and Temporal Variations of Winds in the Lower Thermosphere near
Auroral arc --Preliminary Results--, 8th Scientific Assembly of
International Association of Geomagnetism and Aeronomy, August, 1997.
Oyama, S., O. Takai, Influence of gas
pressure on electrical and optical properties of InN thin films prepared
by reactive sputtering, JIM, TMS, ASM, KIM, ISIJ,MMIJ, December, 1995.
橋本新吾, 野澤悟徳,堤雅基,津田卓雄,大山伸一郎,藤井良一,Asgeir Brekke, Chris Hall, ベアアイランド流星レーダーを用いた極冠域下部熱圏・中間圏大気ダイナミクスの研究, 第128回地球電磁気・地球惑星圏学会, 2010年11月.
津田卓雄, 野澤悟徳,大山伸一郎,小川泰信,藤井良一, Report on statistical analysis of the lower thermospheric
wind velocity using EISCAT Svalbard radar data, 第128回地球電磁気・地球惑星圏学会, 2010年11月.
Kosch, M., 野澤悟徳, 大塚雄一, 大山伸一郎, 塩川 和夫,
津田卓雄, 藤井良一, 小川 泰信, C. Anderson, L. Baddeley, A. Aruliah, I. Yiu, V. Howells, I.
McCrea, Observations of meso-scale neutral wind interaction with auroral
precipitation in the thermosphere, 日本地球惑星科学連合2010年大会, 2010年5月.
津田卓雄, 野澤悟徳, 大山伸一郎, 小川泰信,
Statistical study on high-speed neutral winds observed in the lower
thermosphere over Longyearbyen (78.2 deg N), 日本地球惑星科学連合2009年大会, 2009年5月.
Kurihara, J., S. Oyama, S. Nozawa, R.
Fujii, Y. Ogawa, N. Iwagami, and M. Larsen, DELTA-2 campaign in 2009:
Combined rocket and EISCAT observations of the lower thermosphere, EISCATレーダーを軸とした北極域高層研究観測国際研究小集会, 2008年3月.
村山泰啓, 大山伸一郎, 佐藤薫, 廣岡俊彦, 宮原三郎, W. Singer, D. Riggin, ポーカーフラットとアンデネスにおける中層大気ジェットの変動, 極地研究所 極域における電離圏磁気圏総合観測シンポジウム, 2002年7月.
大山伸一郎, 野澤悟徳, 村山泰啓, 藤井良一, 品川裕之, Polar thermospheric winds in the transient region between the
ionospheric E- and F-regions, 「中間圏・熱圏・電離圏研究会」研究集会,
2002年9月.
岩橋弘幸, 野澤悟徳, 大山伸一郎, 村山泰啓,
A. Brekke, C. M. Hall, C. Meek, 藤井良一, 極域中間圏で観測された準二日波と大気潮汐波, 「中間圏・熱圏・電離圏研究会」研究集会, 2002年9月.
足立和寛, 藤井良一, 野澤悟徳, 山口敏明, 大山伸一郎, A. Brekke, C. M. Hall, 小野高幸, EISCATレーダーと多波長フォトメータ同時観測による降下電子エネルギーの研究, 「中間圏・熱圏・電離圏研究会」研究集会, 2002年9月.
村山泰啓, 大山伸一郎, W. Singer, D. Riggin, アラスカとノルウェーにおける中間圏風速の比較観測, 日本気象学会, 2001年10月.
Oyama, S., M. Ishii, H. Shinagawa, and
M. Conde, Neutral wind structures in the upper thermosphere observed with
the two FPIs in association with auroral heating, 地球電磁気・地球惑星圏学会, 2001年11月.
大山伸一郎, 石井守, 野澤悟徳, S. C. Buchert, 藤井良一, イオンおよび大気運動に与える高緯度電離圏加熱の影響, 地球電磁気・地球惑星圏学会, 1998年11月.
大山伸一郎, 石井守, 野澤悟徳, S. C. Buchert, 藤井良一, 極域F領域における中性大気振動のイオン運動への影響, 地球電磁気・地球惑星圏学会, 1999年6月.
大山伸一郎, 品川裕之, 野澤悟徳, S. C. Buchert, 藤井良一, オーロラアークの通過に伴う電離圏加熱と中性大気運動, 地球電磁気・地球惑星圏学会, 1999年11月.
大山伸一郎, 石井守, 野澤悟徳, S. C. Buchert, 藤井良一, 磁力線方向のイオン速度および中性風の比較 ~ジュール加熱の影響~, 地球電磁気・地球惑星圏学会, 1998年5月.
大山伸一郎, 石井守, 野澤悟徳, S. C. Buchert, 藤井良一, 石井守, 磁力線方向のイオン速度および中性風に与える電離圏加熱の影響, 極域における電離圏磁気圏総合観測シンポジウム, 1998年7月.
大山伸一郎, 藤井良一, 野澤悟徳, S. C. Buchert, オーロラ活動にともなう電離圏プラズマ運動の変化, リモートセンシングによる極域超高層の研究集会, 1998年10月.
大山伸一郎, 今井毅, 野澤悟徳, 藤井良一,
S. C. Buchert, 石井守, 森弘隆, 巖本巖, 岡野章一, 高橋幸弘, 福西浩, A. Brekke, M. Kosch, T. Hagfors, C. Lathuillere, W. Kofman,
Preliminary report on the simultaneous observations of the thermospheric
neutral winds with FPIs and EISCAT radars in January and February, 1997, 地球電磁気・地球惑星圏学会, 1997年3月.