研究論文 / Papers

1. K. Hosokawa, R. Kataoka, T. T. Tsuda, Y. Ogawa, S. Taguchi, Y. Zhang, and L. J. Paxton, Exceptionally gigantic aurora in the polar cap on a day when the solar wind almost disappeared, Sci. Adv., 10, eadn5276, doi:10.1126/sciadv.adn5276, 2024.
2. J. N. Lee, D. L. Wu, B. Thurairajah, Y. Hozumi, and T. T. Tsuda, The sensitivity of polar mesospheric clouds to mesospheric temperature and water vapor, Remote Sens., 16, 1563, doi:10.3390/rs16091563, 2024.
3. T. Nishiyama, M. Kagitani, S. Furutachi, Y. Iwasa, Y. Ogawa, T. T. Tsuda, P. Dalin, F. Tsuchiya, S. Nozawa, and F. Sigernes, The first simultaneous spectroscopic and monochromatic imaging observations of short-wavelength infrared aurora of N2+ Meinel (0,0) band at 1.1 μm with incoherent scatter radar, Earth Planets Space, 76, 30, doi:10.1186/s40623-024-01969-x, 2024.
4. A. Shinbori, Y. Otsuka, T. Sori, M. Nishioka, S. Perwitasari, T. T. Tsuda, N. Nishitani, A. Kumamoto, F. Tsuchiya, S. Matsuda, Y. Kasahara, A. Matsuoka, S. Nakamura, Y. Miyoshi, and I. Shinohara, New aspects of the upper atmospheric disturbances caused by the explosive eruption of the 2022 Hunga Tonga–Hunga Ha’apai volcano, Earth Planets Space, 75, 175, doi:10.1186/s40623-023-01930-4, 2023.
5. A. Shinbori, T. Sori, Y. Otsuka, M. Nishioka, S. Perwitasari, T. T. Tsuda, A. Kumamoto, F. Tsuchiya, S. Matsuda, Y. Kasahara, A. Matsuoka, S. Nakamura, Y. Miyoshi, and I. Shinohara, Generation of equatorial plasma bubble after the 2022 Tonga volcanic eruption, Sci. Rep., 13, 6450, doi:10.1038/s41598-023-33603-3, 2023.
6. S. Ishii, A. Endo, T. Takada, S. Ueta, A. Bessho, K. Kato, T. T. Tsuda, Y. Hozumi, and H. Suzuki, Development for observation system of noctilucent clouds with an ultra-small tethered-balloon: Test flight on summer season of 2021 in Hokkaido, Japan, JAXA Research and Development Report, JAXA-RR-22-008, 1-24, doi:10.20637/00049109, 2023. (in Japanese)
7. S. Nozawa, N. Saito, T. D. Kawahara, S. Wada, T. T. Tsuda, S. Maeda, T. Takahashi, H. Fujiwara, V. L. Narayanan, T. Kawabata, and M. G. Johnsen, A statistical study of convective and dynamic instabilities in the polar upper mesosphere above Tromsø, Earth Planets Space, 75, 22, doi:10.1186/s40623-023-01771-1, 2023.
8. Y. Hobara, M. Watanabe, R. Miyajima, H. Kikuchi, T. T. Tsuda, and M. Hayakawa, On the spatio-temporal dependence of anomalies in the atmospheric electric field just around the time of earthquakes, Atmosphere, 13, 1619, doi:10.3390/atmos13101619, 2022.
9. S.-i. Oyama, H. Vanhamäki, L. Cai, A. Aikio, M. Rietveld, Y. Ogawa, T. Raita, M. Kellinsalmi, K. Kauristie, B. Kozelov, A. Shinbori, K. Shiokawa, T. T. Tsuda, and T. Sakanoi, Thermospheric wind response to a sudden ionospheric variation in the trough: Event at a pseudo breakup during geomagnetically quiet conditions, Earth Planets Space, 74, 154, doi:10.1186/s40623-022-01710-6, 2022.
10. A. Shinbori, Y. Otsuka, T. Sori, M. Nishioka, S. Perwitasari, T. T. Tsuda, and N. Nishitani, Electromagnetic conjugacy of ionospheric disturbances after the 2022 Hunga Tonga-Hunga Ha'apai volcanic eruption as seen in GNSS-TEC and SuperDARN Hokkaido pair of radars observations, Earth Planets Space, 74, 106, doi:10.1186/s40623-022-01665-8, 2022.
11. S. Nanjo, S. Nozawa, M. Yamamoto, T. Kawabata, M. G. Johnsen, T. T. Tsuda, and K. Hosokawa, An automated auroral detection system using deep learning: real‐time operation in Tromsø, Norway, Sci. Rep., 12, 8038, doi:10.1038/s41598-022-11686-8, 2022.
12. T. D. Kawahara, S. Nozawa, N. Saito, T. T. Tsuda, T. Kawabata, and S. Wada, Mesopause temperature and wind observations by a narrowband Na lidar, Journal of Laser Radar Society of Japan, 3, 36-45, 2022. (in Japanese)
13. M. Yamauchi, J. D. Keyser, G. Parks, S.-i. Oyama, P. Wurz, T. Abe, A. Beth, I. A. Daglis, I. Dandouras, M. Dunlop, P. Henri, N. Ivchenko, E. Kallio, H. Kucharek, Y. C.-M. Liu, I. Mann, O. Marghitu, G. Nicolaou, Z. Rong, T. Sakanoi, J. Saur, M. Shimoyama, S. Taguchi, F. Tian, T. Tsuda, B. Tsurutani, D. Turner, T. Ulich, A. Yau, and I. Yoshikawa, Plasma-neutral gas interactions in various space environments: Assessment beyond simplified approximations as a Voyage 2050 theme, Exp. Astron., doi:10.1007/s10686-022-09846-9, 2022.
14. H. Suzuki, A. Matsumoto, P. Dalin, Y. Nakamura, S. Ishii, K. Sakanoi, K. Sakaguchi, T. Takada, T. T. Tsuda, and Y. Hozumi, Capability of airline jets as an observation platform for noctilucent clouds at middle latitudes, Prog. Earth Planet Sci., 9, 11, doi:10.1186/s40645-022-00469-4, 2022.
15. T. T. Tsuda, Y. Hozumi, K. Kawaura, K. Tatsuzawa, Y. Ando, K. Hosokawa, H. Suzuki, K. T. Murata, T. Nakamura, J. Yue, and K. Nielsen, Detection of polar mesospheric clouds utilizing Himawari-8/AHI full-disk images, Earth and Space Science, 9, e2021EA002076, doi:10.1029/2021EA002076, 2022.
16. M. Fukizawa, T. Sakanoi, Y. Ogawa, T. T. Tsuda, and K. Hosokawa, Statistical study of electron density enhancements in the ionospheric F region associated with pulsating auroras, J. Geophys. Res. Space Physics, 126, e2021JA029601, doi:10.1029/2021JA029601, 2021.
17. Y. Hozumi, T. T. Tsuda, K. Hosokawa, Y. Ando, H. Suzuki, K. T. Murata, and T. Nakamura, Horizontal movement of polar mesospheric clouds observed from the Himawari-8 geostationary meteorological satellite, J. Geophys. Res. Atmospheres, 126, e2021JD035081, doi:10.1029/2021JD035081, 2021.
18. T. T. Tsuda, Y.-M. Tanaka, R. Tozu, K. Takizawa, M. K. Ejiri, T. Nishiyama, T. D. Kawahara, and T. Nakamura, Relationship between Na layer and CNA variations observed at Syowa, Antarctic, Earth Planets Space, 73, 7, doi:10.1186/s40623-020-01335-7, 2021.
19. T. T. Tsuda, C. Li, S. Hamada, K. Hosokawa, S.-i. 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 Tromsø, Norway, J. Geophys. Res. Space Physics, 125, e2020JA028250, doi:10.1029/2020JA028250, 2020.
20. T. T. Tsuda, S. Nozawa, N. Saito, T. D. Kawahara, T. Kawabata, T. Takahashi, S. Wada, T. Nakamura, M. K. Ejiri, T. Nishiyama, K. Tsuno, and M. Abo, Observations of metallic layers in the Earth's upper atmosphere based on resonance-scattering lidars, The review of laser engineering, 48, 580-584, 2020. (in Japanese)
21. S. Oyama, A. Shinbori, Y. Ogawa, M. Kellinsalmi, T. Raita, A. Aikio, H. Vanhamäki, K. Shiokawa, I. Virtanen, L. Cai, A. B. Workayehu, M. Pedersen, K. Kauristie, T. T. Tsuda, B. Kozelov, A. Demekhov, A. Yahnin, F. Tsuchiya, A. Kumamoto, Y. Kasahara, A. Matsuoka, M. Shoji, M. Teramoto, and M. Lester, An ephemeral red arc appeared at 68º MLat at a pseudo breakup during geomagnetically quiet conditions, J. Geophys. Res. Space Physics, 125, e2020JA028468, doi:10.1029/2020JA028468, 2020.
22. M. K. Ejiri, T. Nakamura, T. T. Tsuda, T. Nishiyama, M. Abo, C.-Y. She, M. Nishioka, A. Saito, T. Takahashi, K. Tsuno, T. D. Kawahara, T. Ogawa, and S. Wada, Observation of synchronization between instabilities of the sporadic E layer and geomagnetic field line connected F‐region medium‐scale traveling ionospheric disturbances, J. Geophys. Res. Space Physics, 124, 4627-4638, doi:10.1029/2018JA026242, 2019.
23. M. K. Ejiri, T. Nakamura, T. T. Tsuda, T. Nishiyama, M. Abo, T. Takahashi, K. Tsuno, T. D. Kawahara, T. Ogawa, and S. Wada, Vertical fine structure and time evolution of plasma irregularities in the Es layer observed by a high-resolution Ca+ lidar, Earth Planets Space, 71, 3, doi:10.1186/s40623-019-0984-z, 2019.
24. S. Nozawa, T. Kawabata, K. Hosokawa, Y. Ogawa, T. T. Tsuda, A. Mizuno, R. Fujii, and C. M. Hall, A new five-wavelength photometer operated in Tromsø (69.6ºN, 19.2ºE), Earth Planets Space, 70, 193, doi:10.1186/s40623-018-0962-x, 2018.
25. T. T. Tsuda, Y. Hozumi, K. Kawaura, K. Hosokawa, H. Suzuki, and T. Nakamura, Initial report on polar mesospheric cloud observations by Himawari-8, Atmos. Meas. Tech., 11, 6163-6168, doi:10.5194/amt-11-6163-2018, 2018.
26. S.-i. Oyama, T. T. Tsuda, K. Hosokawa, Y. Ogawa, Y. Miyoshi, S. Kurita, A. E. Kero, R. Fujii, Y. Tanaka, A. Mizuno, T. Kawabata, B. Gustavsson, and T. Leyser, Auroral molecular-emission effects on the atomic oxygen line at 777.4 nm, Earth Planets Space, 70, 166, doi:10.1186/s40623-018-0936-z, 2018.
27. T. T. Tsuda, 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 Tromsø using dynasonde data, Earth Planets Space, 70, 94, doi:10.1186/s40623-018-0864-y, 2018.
28. T. T. Tsuda, 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 Tromsø using dynasonde data, Earth Planets Space, 70, 40, doi:10.1186/s40623-018-0805-9, 2018.
29. S.-i. Oyama, K. Kubota, T. Morinaga, T. T. Tsuda, J. Kurihara, M. F. Larsen, M. Yamamoto, and L. Cai, Simultaneous FPI and TMA measurements of the lower-thermospheric wind in the vicinity of the poleward-expanding aurora after substorm onset, J. Geophys. Res. Space Physics, 122, 10,864-10,875, doi:10.1002/2017JA024613, 2017.
30. M. Kogure, T. Nakamura, M. K. Ejiri, T. Nishiyama, Y. Tomikawa, M. Tsutsumi, H. Suzuki, T. T. Tsuda, T. D. Kawahara, and M. Abo, Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70 km altitude over Syowa (69ºS, 40ºE), the Antarctic, J. Geophys. Res. Atmospheres, 122, 7869-7880, doi:10.1002/2016JD026360, 2017.
31. T. T. Tsuda, T. Nakamura, M. K. Ejiri, T. Nishiyama, K. Hosokawa, T. Takahashi, J. Gumbel, and J. Hedin, Statistical investigation of Na layer response to geomagnetic activity using resonance scattering measurements by Odin/OSIRIS, Geophys. Res. Lett., 44, 5943-5950, doi:10.1002/2017GL072801, 2017.
32. T. D. Kawahara, 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 Tromsø, Norway (69.6ºN, 19.2ºE), Opt. Express, 25, A491-A501, doi:10.1364/OE.25.00A491, 2017.
33. 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, Depletion of mesospheric sodium during extended period of pulsating aurora, J. Geophys. Res. Space Physics, 122, 1212-1220, doi:10.1002/2016JA023472, 2017.
34. S.-i. Oyama, K. Shiokawa, Y. Miyoshi, K. Hosokawa, B. J. Watkins, J. Kurihara, T. T. Tsuda, and C. T. Fallen, Lower thermospheric wind variations in auroral patches during the substorm recovery phase, J. Geophys. Res. Space Physics, 121, 3564-3577, doi:10.1002/2015JA022129, 2016.
35. 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, A sporadic sodium layer event detected with five-directional lidar and simultaneous wind, electron density, and electric field observation at Tromsø, Norway, Geophys. Res. Lett., 42, 9190-9196, doi:10.1002/2015GL066411, 2015.
36. 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, A case study on generation mechanisms of a sporadic sodium layer above Tromsø (69.6ºN) during a night of high auroral activity, Ann. Geophys., 33, 941-953, doi:10.5194/angeo-33-941-2015, 2015.
37. T. T. Tsuda, X. Chu, T. Nakamura, M. K. Ejiri, T. D. Kawahara, A. S. Yukimatu, and K. Hosokawa, A thermospheric Na layer event observed up to 140 km over Syowa Station (69.0ºS, 39.6ºE) in Antarctica, Geophys. Res. Lett., 42, 3647-3653, doi:10.1002/2015GL064101, 2015.
38. T. Nishiyama, K. Sato, T. Nakamura, M. Tsutsumi, T. Sato, M. Kohma, K. Nishimura, Y. Tomikawa, M. K. Ejiri, and T. T. Tsuda, Height and time characteristics of seasonal and diurnal variations in PMWE based on 1 year observations by the PANSY radar (69.0ºS, 39.6ºE), Geophys. Res. Lett., 42, 2100-2108, doi: 10.1002/2015GL063349, 2015.
39. 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, 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, J. Geophys. Res. Space Physics, 119, 441-451, doi:10.1002/2013JA019520, 2014.
40. S. Oyama, 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, J. Geophys. Res. Space Physics, 119, 4146-4156, doi:10.1002/2013JA019704, 2014.
41. 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, A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data, Ann. Geophys., 32, 1195-1205, doi:10.5194/angeo-32-1195-2014, 2014.
42. N. Matuura, T. Tsuda, and S. Nozawa, Field-aligned current loop model on formation of sporadic metal layers, J. Geophys. Res. Space Physics, 118, 4628-4639, doi:10.1002/jgra.50414, 2013.
43. S. Oyama, T. Watanabe, R. Fujii, S. Nozawa, and T. T. Tsuda, Layered conductance in the ionosphere estimated using data from a multi-wavelength photometer at the European Incoherent Scatter radar site, Antarctic Record, 57(3), 339-356, 2013.
44. Y. Ogawa, 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, 7426-7437, doi:10.1002/2013JA018965, 2013.
45. 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, Decrease in sodium density observed during auroral particle precipitation over Tromsø, Norway, Geophys. Res. Lett., 40, 4486-4490, doi:10.1002/grl.50897, 2013.
46. 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, Large-scale data processing and visualization of the European incoherent scatter (EISCAT) radar system, Journal of Space Science Informatics Japan, 11, 83-89, 2012. (in Japanese)
47. S. Oyama, J. Kurihara, B. Watkins, 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, 2012.
48. S. Nozawa, C. M. Hall, M. Tsutsumi, A. Brekke, Y. Ogawa, T. Tsuda, S. Oyama, and R. Fujii, Mean winds, tides, and quasi-2day waves above Bear Island, J. Atmos. Sol. Terr. Phys., 90-91, 26-44, 2012.
49. 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, 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.
50. S. Oyama, A. Brekke, T. T. Tsuda, J. Kurihara, and B. J. Watkins, Variance of the vertical ion speed measured with the European Incoherent Scatter (EISCAT) UHF radar in the polar lower ionosphere at Tromsø, Norway, J. Geophys. Res., 116, A00K06, doi:10.1029/2010JA016129, 2011.
51. 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, Fine structure of sporadic sodium layer observed with a sodium lidar at Tromsø, Norway, Geophys. Res. Lett., 38, L18102, doi:10.1029/2011GL048685, 2011.
52. S. Nozawa, 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., 115, A08312, doi:10.1029/2009JA015237, 2010.
53. S. Oyama, 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 Tromsø, Norway, Ann. Geophys., 28, 1847-1857, doi:10.5194/angeo-28-1847-2010, 2010.
54. T. T. Tsuda, 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.
55. 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, 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.
56. S. Maeda, 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.
57. J. Kurihara, S. Oyama, S. Nozawa, T. 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, 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.
58. S. C. Buchert, T. Tsuda, R. Fujii, and S. Nozawa, The Pedersen current carried by electrons: a non-linear response of the ionosphere to magnetospheric forcing, Ann. Geophys., 26, 2837-2844, doi:10.5194/angeo-26-2837-2008, 2008.
59. T. T. Tsuda, 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.
60. S. Nozawa, 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 Planets Space, 58, 1183-1191, doi:10.1186/BF03352008, 2006.