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(A) Refereed papers



1990

(1) Uchida, Y. , A. Mizuno, S. Nozawa and Y. Fukui, Velocity split along the Rho Ophiuchi Streamer (North): Spinning Streamer as "Angular Momentum Drain" from Massive Cloud of Active Star Fomation, Publ. Aston. Soc. Japan, 42, 69-83, 1990.

(2) Mizuno, A. , Y. Fukui, T. Iwata, S. Nozawa and T. Takano, A Remarkable multilobe molecular outflow: r Ophiuch East, Associated with IRAS 16293-2422, The Astrophysical Journal, 356, 184-194, 1990.


1991

(3) Nozawa, S., A. Mizuno, Y. Teshima, H. Ogawa and Y. Fukui, A study of 13CO cloud cores in Ophiuchus, The Astrophysical Journal Supplement Series, 77, 647-675, 1991.


1992

(4) Kawabata, K.-a., Y. Fukui, H. Ogawa, A. Mizuno, M. Fujimoto, S. Nozawa, H. Nakane, H. Hoko and Ji Yang, Observations of Ozone Mixing Ratio by Nagoya 4 m Millimeterwave Telescope, J. Geomag. Geoelectr., 44, 1085-1096, 1992.


1994

(5) Brekke, A., S. Nozawa and T. Sparr, Studies of the E region neutral wind in the quiet auroral ionosphere, J. Geophys. Res., 99, 8801-8825, 1994.

(6) Dobashi, K., S. Nozawa, Y. Hayashi, F. Sato, and Y. Fukui, A Molecular cloud and a CO outflow associated with IRAS 22134+5834, The Astronomical Journal, 107, 2148-2152, 1994.


1995

(7) Sato, M., Y. Kamide, A.D. Richmond, A. Brekke and S. Nozawa, Regional estimation of electric fields and currents in the polar ionosphere, Geophys. Res. Lett., 22, 283-286, 1995.

(8) Nozawa, S. and A. Brekke, Studies of the E region neutral wind in the disturbed auroral ionosphere, J. Geophysi. Res., 100, 14,717-14,734, 1995.

(9) Dobashi, K., J.-P. Bernard, Y. Yonekura, S. Nozawa, S. Morimoto, P. Abraham, Y. Kumai, Y. Hayashi, and Y. Fukui, 12CO and 13CO Observations toward two Small Molecular Clouds with Luminous Protostellar Canditates, Publ. Aston. Soc. Japan, 47, 837-843, 1995.

(10) Fujii, R., S. Nozawa, M. Sato, N. Matuura, T. Ono, A. Brekke, C. Hall and T.-L. Hansen, Comparison of electron spectra calculated from EISCAT electron density profiles with those observed by DMSP satellites, J. Geomag. Geoelectr., 47, 771-782, 1995.

(11) Brekke, A., S. Nozawa and M. Sato, Samples of auroral E-region parameters derived from EISCAT experiments, J. Geomag. Geoelectr., 47, 889-909, 1995.


1997

(12) Nozawa, S., A. Brekke and R. Fujii, Studies of the E region neutral wind in the auroral ionosphere using two long-run data, J. Geomag. Geoelectr., 49, 641-673, 1997.


1998

(13) Fujii, R., S. Nozawa, N. Matuura, and A. Brekke, Study on neutral wind contribution to the electrodynamics in the polar ionosphere using EISCAT CP-1 data, J. Geophysi. Res., 103, 14,731-14739, 1998 (July 1).

(14) Nishino, M., S. Nozawa and J. A. Holtet, Daytime Ionospheric Absorption Features in the Polar Cap Associated with Poleward Drifting F-region Plasma Patches, Earth Plannets Sci., 50, 107-117, 1998 (Feb 1).

(15) Fujii, R., S. Nozawa, S.C. Buchert, N. Matuura, and A. Brekke, The motion of ions in the aruraol ionosphere, J. Geophysi. Res., 103, 20,685-20,695, 1998 (September 1).


1999

(16) Fujii, R., S. Nozawa, S. C. Buchert, N. Matuura, and A. Brekke, Statistical characteristics on electromagnetic energy transfer between the magnetosphere, the ionosphere, and the thermosphere, J. Geophys. Res., 104, 2357-2365, 1999 (February 1).

(17) Nozawa, S. and A. Brekke, Studies of the auroral E-region neutral wind through a solar cycle: Quiet days, J. Geophys. Res., 104, 45-66, 1999 (January 1).

(18) Nozawa, S. and and A. Brekke, Seasonal variation of the auroral E-region neutral wind for different solar activities, J. Atoms. Solar-Terr. Phys., 61, 585-605, 1999 (May 1).

(19) Maeda, S., H Fujiwara, and S. Nozawa, Dayside neutral winds in high-latitude lower thermosphere during geomagnetically quiet summer days, J. Geophysi. Res., 104, 19,871-19,879, 1999 (September 1).

(20) 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 Plannets Sci., 51, 833-844, 1999 (July 1).


2000

(21) Kosch, M. J., M. Ishii, S. Nozawa, D. Rees, K. Cierpka, A. Kohsiek, K. Schlegel, R. Fujii, T. Hagfors, T. J. Fuller-Rowell and C. Lathuillere, A comparison of thermospheric winds and temperatures from Fabry-Perot interferometer and EISCAT radar measurements with models, Adv. Space Res., 26(6), 979-984, 2000 (June 1).

(22) Fujii, R., S. Nozawa, S. C. Buchert, and A. Brekke, Energy coupling between the magnetosphere, ionosphere and thermosphere, Adv. Space Res., 25, (1)213-(1)218, 2000.

(23) Ogawa, Y., R. Fujii, S. C. Buchert, S. Nozawa, S. Watanabe, and A. P. van Eyken, Simultaneous EISCAT Svalbard and VHF radar observations of ion upflows at different aspect angles, Geophys. Res. Lett., 27, 81-84, 2000 (January 1, 2000).

(24) Endo, M., R. Fujii, Y. Ogawa, S. C. Buchert, S. Nozawa, S. Watanabe, and N. Yoshida, Ion outflow and inflow at the topside ionosphere observed by the EISCAT VHF radar, Ann. Geophys., 18, 170-181, 2000.

(25) Hall, C., S. Nozawa, A. Mansan and C. Meek, Determination of turbulent energy dissipation rate directly from MF-radar determined velocity, Earth Plannets Sci., 52, 137-141, 2000.

(26) Yoshida, N., S. Watanabe, H. Fukunishi, T. Sakanoi, T. Abe, T. Mukai, H. Hayakawa, A. Matsuoka, Y. Kasahara, R. Fujii, S. Nozawa, Y. Ogawa, and M. Syrjasuo, Coordinated Akebono and EISCAT observations of suprathermal ion outflows in the nightside inverted-V region, J.Atoms. Solar-Terr. Phys., 62, 449-465 2000.

(27) Nozawa, S. and A. Brekke, A case study of the auroral E region neutral wind on a quiet summer day: Comparison of three methods of the EISCAT UHF radar for deriving the E region wind, Radio Science, 35, 845-863, 2000.

(28) Cierpka, K., M. J. Kosch, S. Nozawa, K. Schlegel, A. Kohsiek, and T. Hagfors, Combined EISCAT and Fabry-Perot Interferometer Measurements of Ionospheric-Thermospheric coupling, Phys. Chem. Earth, 25, 563-566, 2000.

(29) 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, Annales Geophysicae, 18, 1154-1163, 2000 (September 1, 2000).

(30) Saito, S., F.R.E. Forme, S. C. Buchert, S. Nozawa and R. Fujii, Effects of a kappa distribution function of electrons on incoherent scatter spectra, Ann. Geophysicae, 18, 1216-1223, 2000 (September 1, 2000).


2001

(31) Saito, S., S. C. Buchert, S. Nozawa, and R. Fujii, Observations of isotropic electron temperature in the turbulent E region, Ann. Geophysicae, 19, 11-15, 2001.

(32)* Oyama, S., M. Ishii, and Y. Murayama, H. Shinagawa, S. Nozawa, S. C. Buchert, R. Fujii, 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.

(33) Nagatsuma, T., S. Nozawa, S. C. Buchert, and R. Fujii, High latitude Pi3 pulsations observed by the EISCAT VHF radar, Adv. Space Res., 28(7), 1093-1096, 2001.

(34) Oyama, S., H. Shinagawa, S. C. Buchert, R. Fujii, S. Nozawa, M. Ishii, Y. Murayama and W. Kofman, Effects of auroral arcs on the generation of gravity waves in the auroral F region, Adv. Space Res., 27(10), 1767-1772, 2001.

(35) Nozawa, S., H.-L. Liu, A.D. Richmond, and R. Roble, Comparison of the auroral E region neutral winds derived with the European Incoherent Scatter radar and predicted by the National Center for Atmospheric Research Thermosphere-Ionosphere-Mesosphere-Electrodynamics general circulation model, J. Geophys. Res., 106, 24,691-24,700, 2001.


2002

(36) Fujii, R, S. Oyama, S. C. Buchert, S. Nozawa, and N. Matuura, Field-aligned ion motions in the E and F regions, J. Geophys. Res., 107, 10.129/2001JA900148, SIA 1-1 - 1-10, 2002.

(37) Shinagawa, H., S. Oyama, S. Nozawa, S. C. Buchert, R. Fujii, and M. Ishii, Thermospheric and ionosphric dynamics in the auroral region, Adv. Space Res., in press, 2002.

(38) Nozawa, S., A. Brekke, A. Manson, C. Hall, C. Meek, K. Morise, S. Oyama, K. Dobashi, and R. Fujii, A comparison study of the auroral E region neutral winds derived by the EISCAT UHF radar and the Tromsö MF radar, J. Geophys. Res., 107, 10.1029/2000JA007581, SIA 29-1 - SIA29-20, 2002.

(39) Sugino, M., R. Fujii, S. Nozawa, St. C. Buchert, H. J. Opgenoorth, A. Brekke, Relative contribution of the ionospheric conductivity and the electric field to the ionospheric current, J. Geophys. Res., 107, 10.1029/2001JA007545, 2002.

(40) Hall, C. M., S. Nozawa, C. E. Meek, and A. H. Manson, On the response of upper homosphere turbulence to solar and geomagnetic disturbances, Earth Plannets Sci., 54, 699-705, 2002.

(41) Sugino, M., R. Fujii, S. Nozawa, T. Nagatsuma, S. C. Buchert , J. W. Gjerloev, and M. J. Kosch, Field-aligned currents and ionospheric parameters deduced from EISCAT radar measurements in the post-midnight sector, Annales Geophysicae, 20, 1335-1348, 2002.

(42) Danskin, D.W., A.V. Koustov, T. Ogawa, N. Nishitani, S. Nozawa, S. E. Milan, M. Lester, and D. Andre, On the factors controlling occurrence of F-region coherent echoes, Ann. Geophysi., 20, 1385-1397, 2002.

(43) Maeda, S., S. Nozawa, M. Sugino, H. Fujiwara, and M. Suzuki, Ion and neutral temperature distributions in the E-region observed by the EISCAT Tromsoe and Svalbard radars, Annales Geophysicae, 20, 1415-1427, 2002.

(44) Koustov, A.V, D.W. Danskin, M. V. Uspensky, T. Ogawa, P. Janhunen, N. Nishitani, S. Nozawa, M. Lester, and S. Milan, Velocities of auroral coherent echoes at 12 and 144 MHz, Annales Geophysicae, 20, 1647-1661, 2002.


2003

(45) Uspensky, M., A. Koustov, P. Janhunen, R. Pellinen, D. Danskin, and S. Nozawa, STARE Velocities: Importance of Off-Orthogonality and Ion Motions, Ann. Geophysicae, 21, 729-743, 2003.

(46) Nozawa, S., S. Imaida, A. Brekke, C Hall, A Manson, C. Meek, S. Oyama, K. Dobashi, and R. Fujii, The quasi 2-day wave observed in the polar mesosphere, J. Geophys. Res., 108, 10.1029/2002JD002440, ACL 3-1 - 3-12, 2003.

(47) Hall, C.M, S. Nozawa, C. E. Meek, A. H. Manson, and Yi Luo, Periodicities in energy dissipation rates in the auroral mesosphere/lower thermosphere, Ann. Geophysicae, 21, 787-796, 2003.

(48) Ogawa, Y., R. Fujii, S. C. Buchert, S. Nozawa, and S. Ohtani, Simultaneous ESR and DMSP observations of ion upflow in the dayside polar ionosphere, J. Geophys. Res., 108, 10.1029/2002JA009590, SIA 1-1 - 1-10, 2003.

(49) Wu, Q., T. K. Kileen, S. Nozawa, D. McEwen, W. Guo, and S. C. Solomon, Observations of mesospheric neutral wind 12-hour wave in the Northern Polar Cap, J. Atm. Sol-Terr. Phys., 65, 971-978, 2003.

(50) Oyama, S., S. Nozawa, S. Maeda, Y. Murayama, R. Fujii, and H. Shinagawa, Field-aligned ion motions in the E-F transition region: 1. Mean characteristics, J. Geophys. Res., accepted, 2003.

(51) Hall, C. M., T. Aso, A.H. Manson, C.E. Meek, S. Nozawa, and M. Tsutsumi, High latitude mesospheric mean winds: a comparison between Tromsoe (69N) and Svalbard (78N), J. Geophys. Res., 108, 4598, doi:10.1029/2003JD003509. 2003.

(52) Nozawa, S., H. Iwahashi, A. Brekke, C. 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 Tromsö and Poker-Flat, J. Geophys. Res., 108 , 101029/2002JD003221,2003.


2004

(53) Manson, A. H., C.E. Meek, C.M. Hall, S. Nozawa, N.J. Mitchell, D. Pancheva, W. Singer, and P. Hoffmann, MESOPAUSE DYNAMICS FROM THE SCANDINAVIAN TRIANGLE OF RADARS WITHIN THE PSMOS-DATAR PROJECT, Ann. Geophysi., 22, 2004.

(54) Fujiwara, H., S. Maeda, M. Suzuki, S. Nozawa, and H. Fukunishi, Estimates of electromagnetic and turbulent energy dissipation rates under the existence of strong wind shears in the polar lower thermosphere from the EISCAT Svalbard radar observations, J. Geophys. Res., 109, A07306, doi:10.1029/2003JA010046, 2004.

(55) Ogawa, T., S. Nozawa, M. Tsutsumi, N. F. Arnold, N. Nishitani, N. Sato, and A. S. Yukimatu Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: Analysis using simultaneous MF and VHF radar data, Ann. Geophysi., 22, 4049-4059, 2004.

(56) Portnyagin Y. I. , T. V. Solovjova, N. A. Makarov, E. G. Merzlyakov, A. H. Manson, C. E. Meek, W. Hocking, N. Mitchell, D. Pancheva, P. Hoffmann, W. Singer, Y. Murayama, K. Igarashi, J. M. Forbes, S. Palo, C. Hall, S. Nozawa, Monthly mean climatology of the prevailing winds and tides in the Arctic mesosphere/lower thermosphere, Ann. Geophys., 22, 3395-3410, 2004.


2005

(57) Hall, C. M., T. Aso, M. Tsutsumi, S. Nozawa, A.H. Manson, and C.E. Meek, Testing the hypothesis of neutral turbulence on the deduction of ambipolar diffusivities from meteor trail expansion, Ann. Geophisicae Letter, 23, 1-3, 2005.

(58) 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., in press, 2005.

(59) Hall, C.M., T. Aso, M. Tsutsumi, S. Nozawa, A.H. Manson and C.E. Meek, A comparison of MLT neutral winds as determined by meteor and medium frequency radar at 70 N, Radio Sci., 40, RS4001, doi:10.1029/2004RS003102, 2005.

(60) Maeda, S., S. Nozawa, H. Fujiwara, and Y. Ogawa, Comparative study of the high-latitude E-region ion and neutral temperatures in the polar cap and the auroral region derived from the EISCAT radar observations, J. Geophys. Res., 110, A08301, 10.1029/2004JA010893, 2005.

(61) S. Nozawa, A. Brekke, S. Maeda, T. Aso, C. Hall, Y. Ogawa, S. Buchert, J. Roettger, A. Richmond, R. Roble, and R. Fujii, Mean winds, tides and quasi-2 day wave in the polar lower thermosphere observed in EISCAT eight day run data in November 2003, J. Geophys. Res., 110, A12309, doi:10.1029/2005JA0011128, 2005.

(62) Zhigang, Y., Ryoichi Fujii, Satonori Nozawa, Y. Ogawa, Statistical height-dependent relative importance of the Lorentz force and Joule heating in generating atmospheric gravity waves in the auroral electrojets, J. Geophys. Res., 110, A12303, doi:10.1029/2005JA011315, 2005.


2006

(63) Hall, C.M., T. Aso, M. Tsutsumi, S. Nozawa, C.E. Meek and A.H. Manson, A comparison of meteor and medium frequency radar kilometer scale MLT dynamics at 70 deg N, J. Atoms. Solar-Terr. Phys., 68, 309-316, 2006.

(64) Hall, C., S. Nozawa, A. Manson, C. Meek, Tidal signatures in mesospheric turbulence, Ann. Geophisicae, 24, 453-465, 2006.

(65) Abe, T., J. Kurihara, N. Iwagami, S. Nozawa, S., Y. Ogawa, R. Fujii, H. Hayakawa, and K. Oyama, Dynamics and energetics in the lower thermosphere in aurora (DELTA) - Japanese sounding rocket campaign, Earth Plannets Sci., 58, 1161-1171, 2006.

(66) Nozawa, S., Y. Ogawa, A. Brekke, T. Tsuda, C. M. Hall, H. Miyaoka, J. Kurihara, T. Abe, and R. Fujii, EISCAT observational results during the DELTA campaign, .Earth Plannets Sci., 58, 1183-1192, 2006.

(67) Uspensky, M. V., A. V. Koustov, and S. Nozawa, STARE velocity at large flow angles: is it related to the ion acoustic speed?, Ann. Geophys., 24, 873-885, 2006

(68) Hall, C. M., A. H. Manson, C. E. Meek, and S. Nozawa, Isolated lower mesospheric echoes seen by medium frequency radar at 70 deg N, 19 deg E, Atmos. Chem. Phys., 6, 5307-5314, 2006.

(69) Ogawa, Y. , S.C. Buchert, R. Fujii, S. Nozawa, and F. Forme , Naturally enhanced ion-acoustic lines at high altitudes, Annales Geophysicae, 24, 3351-3364, 2006.


2007

(70) Tsuda, T. T., S. Nozawa, A. Brekke, Y. Ogawa, T. Motoba, R. Roble, and R. Fujii, An ion drag contribution to the lower thermospheric wind in the summer polar region, J. Geophys. Res., 112, A06319, doi:10.1029/2006JA011785,2007.

(71) Hall, C.M., A. Brekke, A. H. Manson, C. E. Meek, S. Nozawa, Trends in mesospheric turbulence at 70deg N, Atmospheric Science Lttters, 8, 80-84, 2007.

(72) Fujiwara, H., R. Kataoka, M. Suzuki, S. Maeda, S. Nozawa, K. Hosokawa, H. Fukunishi, N. Sato, and M. Lester, Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations, Annales Geophysicae, 25, 2393-2403, 2007.

(73) Hall, CM., A. H. Manson, C. E. Meek, and S. Nozawa, Mesospheric turbulence during PMWE-conducive conditions, Atmos. Chem. Phys. Discuss., 7, 7035-7049, 2007.


2008

(74) Ogawa, Y., K. Seki, M. Hirahara, K. Asamura, T. Sakanoi, S. C. Buchert, Y. Ebihara, Y. Obuchi, A. Yamazaki, I. Sandahl, S. Nozawa, and R. Fujii, Coordinated EISCAT Svalbard radar and Reimei satellite observations of ion upflows and suprathermal ions, J. Geophys. Res., 2007JA012791, 113, doi:10.1029/2007JA012791, 2008.

(75) Hall, C., C. Meek, A. Manson, S. Nozawa, Turbopause determination, climatology and climatic trends, using medium frequency radars at 52degN and 70degN, J. Geophys. Res., 113, D13104, doi:10.1029/2008JD009938, 2008.

(76) 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, Annales Geophysicae, 26, 1491-1505, 2008.

(77) Buchert, S., T. Tsuda, R. Fujii, and S. Nozawa, The Pedersen current carried by electrons: A non-linear response of the ionosphere to magnetospheric forcing, Annales Geophysicae, 26, 2837-2844, 2008.


2009

(78) 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, doi:10.1029/2008JA013867, 2009

(79) Ogawa, Y. S. C. Buchert, R. Fujii, S. Nozawa, and A. P. van Eyken, Characteristics of ion upflow and downflow observed with EISCAT Svalbard radar, J. Geophys. Res., 114, A05305, doi:10.1029/2008JA013817, 2009.

(80) 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.

(81) 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., 114, A09304, doi:10.1029/2009JA014319, 2009.

(82) 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., 114, A11307, doi:10.1029/2009JA014300 2009.

(83) Kurihara, J., 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, 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., 114, A12306, doi:10.1029/2009JA014392, 2009.

(84) Ogawa, Y., I. Haeggstroem, S. C. Buchert, K. Oksavik, S. Nozawa, M. Hirahara, A. P. van Eyken, T. Aso, and R. Fujii, On the source of the polar wind in the polar topside ionosphere: First results from the EISCAT Svalbard radar, Geophys. Res. Lett., 36, L24103, doi:10.1029/2009GL041501, 2009.


2010

(85) Ogawa, Y., S. C. Buchert, A. Sakurai, S. Nozawa, R. Fujii, Solar activity dependence of ion upflow in the polar ionosphere observed with the EISCAT Tromsoe UHF radar, J. Geophys. Res., 115, doi:10.1029/2009JA014766, 2010.

(86) Nozawa, S., Y. Ogawa, S. Oyama, H. Fujiwara, T. Tsuda, A. Brekke, C. Hall, Y. Murayama, S. Kawamura, H. Miyaoka, and R. Fujii, Research on the wind dynamics above Tromsoe in the polar lower thermosphere using the EISCAT long run data set obtained in September 2005, J. Geophys. Res., 115, doi:10.1029/2009JA015237, 2010.

(87) 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., 37, L13806, doi:10.1029/2010GL043643, 2010.

(88) Kurihara, J., Y. Koizumi-Kurihara, N. Iwagami, T. Suzuki, A. Kumamoto, T. Ono, M. Nakamura, M. Ishii, A. Matsuoka, K. Ishisaka, T. Abe, and S. Nozawa, Horizontal structure of sporadic E layer observed with a rocket-borne magnesium ion imager, J. Geophys. Res., 115, A12318, doi:10.1029/2009JA014926, 2010.

(89) 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., 28, 1847-1857, 2010.

(90) Kosch, M., Y. Ogawa, M. Rietveld, S. Nozawa, and R. Fujii, An analysis of pump-induced artificial ionospheric ion upwelling at EISCAT, J. Geophys. Res., 115, A12317, doi:10.1029/2010JA015854, 2010.


2011

(91) Ogawa, Y., S. C. Buchert, I. Haggstrom, 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., 116, A03313, doi:10.1029/2010JA015827, 2011.

(92) Kosch, M., E. Mjolhus, M. Ashrafi, M. Rietveld, T. Yeoman, S. Nozawa, Angular dependence of pump-induced bottom- and top-side ionospheric plasma turbulence at EISCAT, J. Geophys. Res., 116, A03322, doi:10.1029/2010JA016014, 2011.

(93) Kosch, M., Ho-Ching Iris Yiu, Callum Anderson, Takuo Tsuda, Yasunobu Ogawa, Satonori Nozawa, Anasuya Aruliah, Victoria Howells, Lisa Baddeley, Ian McCrea, James Wild, Meso-scale observations of Joule heating near an auroral arc and ion-neutral collision frequency in the polar cap E-region, J. Geophys. Res., 116, A05321, doi:10.1029/2010JA016015, 2011.

(94) Tsuda, T. T., 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, Fine structure of sporadic sodium layer observed with a sodium lidar at Tromsoe, Norway, Geophys. Res. Lett., 38, L18102, doi:10.1029/2011GL048685, 2011.


2012

(95) Fujiwara. H., S. Nozawa, S. Maeda, Y. Ogawa, Y. Miyoshi, H. Jin, H. Shinagawa, and K. Terada, Polar cap thermosphere and ionosphere during the solar minimum period: EISCAT Svalbard radar observations and GCM simulations, Earth Planets Space, 64, 459-465, 2012.

(96) Gorin, J. D., A. V. Koustov, R. A. Makarevich, J.-P. St.-Maurice, and S. Nozawa, Velocity of E-region HF echoes under strongly-driven electrojet conditions, Ann. Geophys., 30, 235?250, 2012.

(97) 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, 64, 1033-1046, 2012.

(98) Nozawa, S., C.M. Hall, M. Tsutsumi, A. Brekke, Y. Ogawa, T. T. Tsuda, S. Oyama, R. Fujii, Mean winds, tides, and quasi-2 day waves above Bear Island, JASTP, 90-91, 26-44, 2012.

(99) 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, JGR, 117, A10316, doi:10.1029/2012JA017928, 2012.


2013

(100) 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., in press, 2013.

(101) Matuura, N., T. Tsuda, and S. Nozawa, Field-Aligned Current Loop Model on Formation of Sporadic Metal Layers, JGR, 118, doi:10.1002/jgra.50414, 2013.

(102) 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 Tromsoe Norway,GRL, 40, DOI: 10.1002/grl.50897, 2013.

(103) 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 nightsidem polar ionosphere, J. Geophys. Res., 118, 7426-7437, DOI: 10.1002/2013JA018965, 2013.

(104) Oyama, S., T. Watanabe, R. Fujii, S. Nozawa, 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, 2013.


2014

(105) 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, 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, J. Geophys. Res., 119, doi:10.1002/2013JA019520, 441-451, 2014.

(106) Fujiwara, H., S. Nozawa, Y. Ogawa, R. Kataoka, Y. Miyoshi, H. Jin, and H. Shinagawa, Extreme ion heating in the dayside ionosphere in response to arrival of a coronal mass ejection on March 12, 2012, Ann. Geophys., 32, 831-839, 2014.

(107) Ogawa, Y., T. Motoba, S. C. Buchert, I. Haaggstroem and S. Nozawa, Upper Atmosphere cooling over the past 33 years, GRL, 41, 5629?5635, doi:10.1002/2014GL060591, 2014.

(108) 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, Auroral fragmentation into patches, J. Geophys. Res., 119, 8249-8261, doi:10.1029/2014JA020050, 2014.

(109) 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, A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data, Ann. Geophys., 32, 1195-1205, 2014.


2015

(110) Wu, Qian and S. Nozawa, Mesospheric and thermospheric observations of the January 2010 stratospheric warming event, JASTP, 123, 22-38, 2015.

(111) 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, A case study on generation mechanisms of a sporadic sodium layer above Tromsoe (69.6 deg N) during a night of high auroral activity, Ann. Geophys., in press, 2015.

(112) Hashimoto A., K. Shiokawa, Y. Otsuka, S.-I. Oyama, S. Nozawa, T. Hori, M. Lester, and M. Johnsen, Statistical study of auroral fragmentation into patches, J. Geophys. Res., in press, doi: doi:10.1029/2015JA021000, 2015.

(113) 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, A sporadic sodium layer event detected with five-directional lidar and simultaneous wind, electron density, and electric field observation at Troms, Norway, Geophys. Res. Lett., 42, 9190-9196, 2015GL066411, 2015.


2016

(114) Hall, C.M., S. E. Holmen, C. E. Meek, A. H. Manson, and S. Nozawa, Change in turbopause altitutude at 52 and 70 deg N, Atmos. Chem. Phys., 16, 2299-2308, 2016.

(115) Tsuda, T., M. Yamamoto, H. Hashiguchi, K. Shiokawa, Y. Ogawa, S. Nozawa, H. Miyaoka, and A. Yoshikawa, A proposal on the study of solar-terrestrial coupling processes with atmospheric radars andground-based observation network, Radio Sci., 51, 9, 1587-1599, doi:10.1002/2016RS006035, 2016.


2017

(116) Takahashi, T., K. Hosokawa, S. Nozawa, T. Tsuda, Y. Ogawa, M. Tsutsumi, Y. Hiraki, H. Fujiwara, T. Kawahara, N. Saito, S. Wada, T. Kawabata, C. Hall, Depletion of mesospheric sodium during extended period of pulsating aurora, J. Geophys. Res., 122, 1212-1220, 2017.

(117) Kawahara, T.D., S. Nozawa, N. Saito, T, Kawabata, T.T. Tsuda, and S. Wada, Sodium temperature/wind LIDAR based on laser-diode-pumped Nd:Yag lasers deployed at Tromsö, Norway (69.6, 19.2), Optics Express, 25, A491-A501, 2017.

(118) Nakamura, Y., K. Shiokawa, Y. Otsuka, S.-I. Oyama, S. Nozawa, T. Komolmis, S. Komonjida, D. Neudegg, C. Yuile, J. Meriwether, H. Shinagawa, and H. Jin, Measurement of thermospheric temperatures using OMTI Fabry-Perot interferometers with 70 mm etalon, Earth, Plan. and Space, 69, doi: 10.1186, 25, A491-A501, 2017.

(119) Adachi,K., S. Nozawa, Y. Ogawa, A. Brekke, C. M. Hall, R. Fujii, Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsö (69.6N), Earth, Planets and Space, Earth, Planets and Space, 69: 90. doi:10.1186/s40623-017-0677-4, 2017.


2018

(120) Tsuda, T. T., M. T. Rietveld, M. J. Kosch, S. Oyama, K. Hosokawa, S. Nozawa, T. Kawabata, A. Mizuno, and Y. Ogawa, Survey of conditions for artificial aurora experiments at EISCAT Tromsö using dynasonde data, Earth Planets Space, 70, 40, doi:10.1186/s40623-018-0805-9, 2018.

(121) Tsuda, T.T., M.T. Rietveld, M.J. Kosch, S. Oyama, Y. Ogawa, K. Hosokawa, S. Nozawa, T. Kawabata, and A. Mizuno, Survey of conditions for artificial aurora experiments by the second electron gyro-harmonic at EISCAT Troms using dynasonde data, Earth, Planets and Space 2018, 70:94 https://doi.org/10.1186/s40623-018-0864-y

(122) Nozawa, S., T. Kawabata, K. Hosokawa, Y. Ogawa, T. Tsuda, A. Mizuno, R. Fujii, and C. Hall, A new five-wavelength photometer operated in Tromsö (69.6N, 19.2E), Earth, Planets and Space, 10.1186/s40623-018-0962-x, 70:193, 2018.


2019

(123) Mondal, S., S. Sarkhel, J. Agarwa, D. Chakrabarty, R. Sekar, T. Yuan, X. Cai, A. Lu, S. Nozawa, N. Saito, T. Kawahara, M. Mlynczak, J. Russell, III, On the long-lasting "C-type" structures in the sodium lidargram: The lifetime of Kelvin-Helmholtz billows in the mesosphere and lower thermosphere region", Journal of Geophysical Research - Space Physics., 10.1029/2019JA026630, 2019.

(124) Yamamoto, M., W. K. Hocking, S. Nozawa, J. Vierinen, H. Liu, and N. Nishitani, https://doi.org/10.1186/s40623-019-1070-2, Special issue Recent Advances in MSTand EISCAT/Ionospheric Studies Special Issue of the Joint MST15 and EISCAT18 Meetings, May 2017, Earth, Planets and Space, 71:99, 2019

(125) Xu, H., K. Shiokawa, S. Oyama, and S. Nozawa, High-latitude thermospheric wind study using a Fabry-Perot interferometer at Tromso in Norway: averages and variations during quiet times, Earth, Planets and Space,71:110, 10.1186/s40623-019-1093-8, 2019.


2020

(126) Ogawa, Y., Y. Tanaka, A. Kadokura, K. Hosokawa, Y. Ebihara, T. Motoba, B. Gustavsson, U. Brandstrom, Y. Sato, S. Oyama, M. Ozaki, T. Raita, F. Sigernes, S. Nozawa, K. Shiokawa, M. Kosch, K. Kauristie, C. Hall, S. Suzuki, Y. Miyoshi, A. Gerrard, H. Miyaoka, and R. Fujii, Development of low-cost multi-wavelength imager system for studies of aurora and airglow, Polar Science, 23, 100501, https://doi.org/10.1016/j.polar.2019.100501, 2020.

(127) Pancheva, D., P. Mukhtarov, C. Hall, C. Meek, M. Tsutsumi, N. Pedatella, S. Nozawa, and A. Manson, Climatology of the main (24-h and 12-h) tides observed by meteor radars at Svalbard and Tromsoe: Comparison with the Models CMAM-DAS and WACCM-X, JASTP, 207, https://doi.org/10.1016/j.jastp.2020.105339, 2020

(128) Kawamura, Y., K. Hosokawa, S. Nozawa, Y. Ogawa, T. Kawabata, S. Oyama, Y. Miyoshi, S. Kurita, and R. Fujii, Estimation of the emission altitude of pulsating aurora using the five-wavelength photometer, Earth, Planets and Space, 72:96, 2020.

(129) Iino, T., H. Sagawa, T. Tsukagoshi, and S. Nozawa, A belt-like distribution of gaseous hydrogen cyanide on Neptune's equatorial stratosphere detected by ALMA, Astrophysical Journal Letters, 10.3847/2041-8213/abbb9a, 2020.

(130) Tsuda, T. T., C. Li, S. Hamada, K. Hosokawa, S. Oyama, S. Nozawa, T. Kawabata, A. Mizuno, J. Kurihara, T. Nishiyama, and M. J. Kosch, OI 630.0 nm and N2 1PG emissions in pulsating aurora events observed by an optical spectrograph at Tromsoe, Norway",JGR: Paper #2020JA028250, accepted, 2020.

(131) Xia, Y., S. Nozawa, J. Jiao, J. Wang, F. Li, X. Cheng, Y. Yang, L. Du, and G. Yang, Statistical study on sporadic sodium layers (SSLs) based on diurnal sodium lidar observations at Beijing, China (40.5 deg.N, 116 deg.E), accepted, JASTP, 2020.


2021

(132) Narayanan, V. L., S. Nozawa, S. Oyama, I. Mann, K. Shiokawa, Y. Otsuka, N. Saito, S. Wada, T. D. Kawahara, and T. Takahashi, Formation of a bottomside secondary sodium layer associated with the passage of multiple mesospheric frontal systems, Atm. Chem. Phys., https://doi.org/10.5194/acp-2020-803, 2020.

(133) Hall, C.M., and S. Nozawa, On the temporal evolution of turbopause altitude, 1996-2021, 70 deg N, 19 deg E, Experimental Results, Experimental Results, 2021, 2, e17, 1-7, doi:10.1017/exp.2021.6

(134) Stober, G., A. Kozlovsky, A. Liu, Z. Qiao, M. Tsutsumi, C. Hall, S. Nozawa, M. Lester, E. Belova, J. Kero, P. J. Espy, R. E. Hibbins, and N. Mitchell, Atmospheric tomography using the Nordic Meteor Radar Cluster and Chilean Observation Network De Meteor Radars: network details and 3DVAR retrieval, Atmospheric Measurement Techniques, 14, 6509-6532, 2021, https://doi.org/10.5194/amt-14-6509-2021











Comments: (32)* "Nozawa, S." was removed by mistake from the author list published in JGR, but it is proven by the responsible editor (Prof Matsumoto) that he is on the list.



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