2024

18 papers were published in 2024.

Refereed Journal Articles

1. Oyama,S., Vanhamaki,H., Cai,L., Shinbori,A., Hosokawa,K., Sakanoi,T., et al.
Thermospheric wind response to March 2023 storm: Largest wind ever observed with a Fabry-Perot interferometer in Tromso, Norway since 2009.
Space Weather, 22, 2024.

2. Tanaka,Y., Ogawa,Y., Kadokura,A., Aso,T., Gustavsson,B., Brändström,U., Sergienko,T., Ueno,G., Saita,S.
Application of generalized aurora computed tomography to the EISCAT_3D project.
Annales Geophysicae, 42, 179–190, 2024.

3. Kirsti Kauristie, Octav Marghitu, Max van de Kamp, Theresa Hoppe, Ilja Honkonen, Adrian Blagau, Ionut Madalin Ivan, Mihail Codrescu, Aaron Ridley, Gábor Tóth, Yasunobu Ogawa, Lorenzo Trenchi
Joule Heating rate at high-latitudes by Swarm and ground-based observations compared to MHD simulations.
Journal of Atmospheric and Solar-Terrestrial Physics, 260, 2024.

4. Bag,T., Ogawa,Y.
Enhanced response of thermospheric cooling emission to negative pressure pulse.
Scientific Reports, 14, 9647, 2024.

5. Bag,T., Ogawa,Y.
Response time of Joule heating rate and nitric oxide cooling emission during geomagnetic storms: Correlated ground-based and satellite observations.
Journal of Geophysical Research: Space Physics, 129, 2024.

6. Nishiyama,T., Kagitani,M., Furutachi,S., et al.
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 and Space, 76, 30, 2024.

7. Dalin,P., Brändström,U., Kero,J., Voelger,P., Nishiyama,T., Trondsen,T., Wyatt,D., Unick,C., Perminov,V., Pertsev,N., Hedin,J.
A novel infrared imager for studies of hydroxyl and oxygen nightglow emissions in the mesopause above northern Scandinavia.
Atmospheric Measurement Techniques, 17, 1561–1576, 2024.

8. Sato,M., Shiokawa,K., Oyama,S.-i., Otsuka,Y., Shinbori,A., Oksanen,A.
Statistical analysis of low-latitude boundary of polar-type medium-scale traveling ionospheric disturbances observed by a 630-nm airglow imager at Nyrola, Finland.
Journal of Geophysical Research: Space Physics, 129, 2024.

9. Kato,Y., Shiokawa,K., Tanaka,Y., Ozaki,M., Kadokura,A., Oyama,S.-i., et al.
Longitudinal development of cosmic noise absorption based on multipoint observations at subauroral latitudes during storm-time substorms on 25–28 August 2018.
Journal of Geophysical Research: Space Physics, 129, 2024.

10. Herlingshaw,K., Partamies,N., van Hazendonk,C.M., Syrjäsuo,M., Baddeley,L., Johnsen,M., Eriksen,N.K., McWhirter,I., Aruliah,A.L., Engebretson,M.J., Oksavik,K., Sigernes,F., Lorentzen,D.A., Nishiyama,T., Cooper,M.B., Meriwether,J.W., Haaland,S., Whiter,D.K.
Science Highlights from the Kjell Henriksen Observatory on Svalbard.
Arctic Science, 2024.

11. Ellahouny,N.M., Aikio,A.T., Vanhamäki,H., Virtanen,I.I., Cai,L., Marchaudon,A., et al.
EISCAT observations of depleted high-latitude F-region during an HSS/SIR-driven magnetic storm.
Journal of Geophysical Research: Space Physics, 129, 2024.

12. Cai,L., Aikio,A., Oyama,S., Ivchenko,N., Vanhamäki,H., Virtanen,I., et al.
Effect of polar cap patches on the high-latitude upper thermospheric winds.
Journal of Geophysical Research: Space Physics, 129, 2024.

13. Tikemani Bag, Y.Ogawa
Impact of interplanetary shock on nitric oxide cooling emission: A superposed epoch study.
Advances in Space Research, 74, 11, 6012-6019, 2024.

14. Bag,T., Sivakumar,V., Ogawa,Y.
Impact of interplanetary shock on thermospheric cooling emission: A case study.
Journal of Geophysical Research: Space Physics, 129, 2024.

15. Sergeev,V.A., Stepanov,N.A., Ogawa,Y., Rozanov,E.V., Shukhtina,M.A.
Local time distribution and activity dependence of extreme electron densities in the auroral D-region as an image of energy-dependent energetic electron precipitation.
Journal of Geophysical Research: Space Physics, 129, 2024.

16. Nagatani,A., Y.Miyoshi, K.Asamura, L.M.Kistler, S.Nakamura, K.Seki, Y.Ogawa, I.shinohara
Variation of molecular ions in the inner magnetosphere observed by the Arase satellite.
Geophysical Research Letters, 51, 2024.

17. Ito,Y., Hosokawa,K., Ogawa,Y., Miyoshi,Y., Tsuchiya,F., Fukizawa,M., et al.
On the factors controlling the relationship between type of pulsating aurora and energy of pulsating auroral electrons: Simultaneous observations by Arase satellite, ground-based all-sky imagers and EISCAT radar.
Journal of Geophysical Research: Space Physics, 129, 2024.

18. Bag,T., Ogawa,Y., Sivakumar,V.
Thermospheric NO cooling during 2003 October “Halloween Storm”: Revisited.
Journal of Geophysical Research: Space Physics, 129, 2024.

2023

11 papers were published in 2023.

Refereed Journal Articles

1. Nozawa,S., Saito,T., D.Kawahara, S.Wada, T.T.Tsuda, S.Maeda, T.Takahashi, H.Fujiwara, V.L.Narayanan, T.Kawabata, M.G.Johnsen
A statistical study of convective and dynamic instabilities in the polar upper mesosphere above Tromsø.
Earth, Planets and Space, 75, 22, 2023.

2. Tian,X., Y.Yu, F.Gong, L.Ma, J.Cao, S.C.Solomon, P.R.Shreedevi, K.Shiokawa, Y.Otsuka, S.Oyama, Y.Miyoshi
Ionospheric modulation by EMIC wave-driven proton precipitation: Observations and simulations.
Journal of Geophysical Research: Space Physics, 128, 2023.

3. Oyama,S., Aikio,A., Sakanoi,T., et al.
Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway.
Earth Planets Space, 75, 70, 2023.

4. Oyama,S., Hosokawa,K., Vanhamäki,H., Aikio,A., Sakanoi,T., Cai,L., et al.
IMF dependence of midnight bifurcation in the thermospheric wind at an auroral latitude based on nine winter measurements in Tromsø, Norway.
Geophysical Research Letters, 50, 2023.

5. Hosokawa,K., Oyama,S.-I., Ogawa,Y., Miyoshi,Y., Kurita,S., Teramoto,M., et al.
A ground-based instrument suite for integrated high-time resolution measurements of pulsating aurora with Arase.
Journal of Geophysical Research: Space Physics, 128, 2023.

6. Nanjo,S., Ebukuro,S., Nakamura,S., Miyoshi,Y., Kurita,S., Oyama,S.-i., et al.
An implication of detecting the internal modulation in a pulsating aurora: A conjugate observation by the Arase satellite and all-sky imagers.
Journal of Geophysical Research: Space Physics, 128, 2023.

7. Murase,K., Kataoka,R., Nishiyama,T., Sato,K., Tsutsumi,M., Tanaka,Y., et al.
Atmospheric ionizations by solar X-rays, solar protons, and radiation belt electrons in September 2017 space weather event.
Space Weather, 21, 2023.

8. Fukizawa,M., Tanaka,Y., Ogawa,Y., Hosokawa,K., Raita,T., Kauristie,K.
Three-dimensional ionospheric conductivity associated with pulsating auroral patches: reconstruction from ground-based optical observations.
Annales Geophysicae, 41, 511–528, 2023.

9. Matuura,N., Fujii,R., Nozawa,S.
History of EISCAT – Part 6: the participation of Japan in the EISCAT Scientific Association.
History of Geo- and Space Sciences, 14, 61–69, 2023.

10. Sato,K., Tomikawa,Y., Kohma,M., Yasui,R., Koshin,D., Okui,H., Watanabe,S., Miyazaki,K., Tsutsumi,M., Murphy,D., Meek,C., Tian,Y., Ern,M., Baumgarten,G., Chau,J.L., Chu,X., Collins,R., Espy,P.J., Hashiguchi,H., Kavanagh,A.J., Latteck,R., Lübken,F.-J., Milla,M., Nozawa,S., Ogawa,Y., Shiokawa,K., Alexander,M.J., Nakamura,T.
Interhemispheric Coupling Study by Observations and Modelling (ICSOM): Concept, Campaigns, and Initial Results.
Journal of Geophysical Research: Atmospheres, 128, 2023.

11. Katoh,Y., P.Rosendahl, Y.Ogawa, Y.Hiraki, H.Tadokoro
Effect of the mirror force on the collision rate due to energetic electron precipitation: Monte Carlo simulations.
Earth, Planets and Space, 75, 117, 2023.

2022

11 papers were published in 2022.

Refereed Journal Articles

1. Oyama,S., 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, T.Sakanoi
Thermospheric wind response to a sudden ionospheric variation in the trough: Event at a pseudo breakup during geomagnetically quiet conditions.
Earth, Planets and Space,74, 154, 2022.

2. Fukizawa,M., T.Sakanoi, Y.Tanaka, Y.Ogawa, K.Hosokawa, B.Gustavsson, K Kauristie, A.Kozlovsky, T.Raita, U.Brändström, T.Sergienko
Reconstruction of precipitating electrons and three-dimensional structure of a pulsating auroral patch from monochromatic auroral images obtained from multiple observation points.
Annales Geophysicae, 40, 475–484, 2022.

3. Nanjo,S., S.Nozawa, M.Yamamoto, T.Kawabata, M.G.Johnsen, T.T.Tsuda, K.Hosokawa
An Automated Auroral Detection System Using Deep Learning: Real-time Operation in Tromsoe, Norway.
Scientific Reports, 12, 8038, 2022.

4. Chen,L., K.Shiokawa, Y.Miyoshi, S.Oyama, C.‐W.Jun, Y.Ogawa, K.Hosokawa, Y.Inaba, Y.Kazama, S.Y.Wang, S.W.Y.Tam, T.F.Chang, B.J.Wang, K.Asamura, S.Kasahara, S.Yokota, T.Hori, K.Keika, Y.Kasaba, A.Kumamoto, F.Tsuchiya, M.Shoji, Y.Kasahara, A.Matsuoka, I.Shinohara, S.Imajo, S.Nakamura, M.Kitahara
Observation of source plasma and field variations of a substorm brightening aurora at L~6 by a ground-based camera and the Arase satellite on 12 October 2017.
Journal of Geophysical Research: Space Physics, 127, 2022.

5. Stober,G., A.Liu, A.Kozlovsky, Z.Qiao, A.Kuchar, C.Jacobi, C.Meek, D.Janches, G.Liu, M.Tsutsumi, N.Gulbrandsen, S.Nozawa, M.Lester, E.Belova, J.Kero, N.Mitchell
Meteor Radar vertical wind observation biases and mathematical debiasing strategies including a 3DVAR+DIV algorithm.
Atmos.Meas.Tech., 15, 5769-5792, 2022.

6. Kavanagh,A., Y.Ogawa, E.E.Woodfield
Two techniques for determining F-region Ion Velocities at meso-scales: differences and impacts on Joule heating.
Journal of Geophysical Research: Space Physics, 127, 2022.

7. Tesfaw H.W., I.I.Virtanen, A.Aikio, A.Nel, M.Kosch, Y.Ogawa
Precipitating electron energy spectra and auroral power estimation by incoherent scatter radar with high temporal resolution.
Journal of Geophysical Research: Space Physics, 127, 2022.

8. Bosse,L., J.lilensten, M.G.Johnsen, N.Gillet, S.Rochat, A.Delboulbé, S.Curaba, Y.Ogawa, P.Derverchère, S.Vauclair
The polarisation of auroral emissions: A tracer of the E region ionospheric currents.
Journal of Space Weather and Space Climate, 12, 17, 2022.

9. Tesema,F., N.Partamies, D.K.Whiter, Y.Ogawa
Types of pulsating aurora: Comparison of model and EISCAT electron density observations.
Annales Geophysicae, 40, 1-10, 2022.

10. Safargaleev,V., Sergienko,T., Hosokawa,K., et al.
Altitude of pulsating arcs as inferred from tomographic measurements.
Earth, Planets and Space, 74, 31, 2022.

11. Yamauchi,M., De Keyser,J., Parks,G., et al.
Plasma-neutral gas interactions in various space environments: Assessment beyond simplified approximations as a Voyage 2050 theme.
Experimental Astronomy, 54, 521–559, 2022.

2021

12 papers were published in 2021.

Refereed Journal Articles

1. Nishiyama,T., M.Taguchi, H.Suzuki, P.Dalin, Y.Ogawa, U.Brandstrom, T.Sakanoi
Temporal evolutions of N2+ Meinel (1,2) band near 1.5 μm associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band.
Earth, Planets and Space, 73, 30, 2021.

2. Hosokawa,K., Y.Miyoshi, S.-I.Oyama, Y.Ogawa, S.Kurita, Y.Kasahara, Y.Kasaba, S.Yagitani, S.Matsuda, M.Ozaki, F.Tsuchiya, A.Kumamoto, T.Takashima, I.Shinohara, R.Fujii
Over-darkening of pulsating aurora.
Journal of Geophysical Research: Space Physics, 126, 2021.

3. Sugo,S., O.Kawashima, S.Kasahara, K.Asamura, R.Nomura, Y.Miyoshi, Y.Ogawa, K.Hosokawa, T. Mitani, T.Namekawa, T.Sakanoi, M.Fukizawa, N.Yagi, Y.Fedorenko, A. Nikitenko, S.Yokota, K.Keika, T.Hori, C.Koehler
Energy-resolved detection of precipitating electrons of 30-100 keV by a sounding rocket associated with dayside chorus waves.
Journal of Geophysical Research: Space Physics, 126, 2021.

4. Takada,M., K.Seki, Y.Ogawa, K.Keika, S.Kasahara, S.Yokota, T.Hori, K.Asamura, Y.Miyoshi, I.Shinohara
Low-altitude ion upflow observed by EISCAT and its effects on supply of molecular ions in the ring current detected by Arase (ERG).
Journal of Geophysical Research: Space Physics, 126, 2021.

5. Fukizawa,M., Sakanoi,T., Ogawa,Y., Tsuda,T.T., Hosokawa,K.
Statistical study of electron density enhancements in the ionospheric F region associated with pulsating auroras.
Journal of Geophysical Research: Space Physics, 126, 2021.

6. Kawamura,M., Sakanoi,T., Fukizawa,M., Miyoshi,Y., Hosokawa,K., Tsuchiya,F., et al.
Simultaneous pulsating aurora and microburst observations with ground-based fast auroral imagers and CubeSat FIREBIRD-II.
Geophysical Research Letters, 48, 2021.

7. Miyamoto,T., Oyama,S.-i., Raita,T., Hosokawa,K., Miyoshi,Y., Ogawa,Y., Kurita,S.
Variations in cosmic noise absorption in association with equatorward development of the pulsating auroral patch: A case study to estimate the energy spectra of auroral precipitating electrons.
Journal of Geophysical Research: Space Physics, 126, 2021.

8. Miyoshi,Y., Hosokawa,K., Kurita,S., et al.
Penetration of MeV electrons into the mesosphere accompanying pulsating aurorae.
Sci Rep, 11, 13724, 2021.

9. Stepanov,N.A., Sergeev,V.A., Shukhtina,M.A., Ogawa,Y., Chu,X., Rogov,D.D.
Ionospheric electron density and conductance changes in the auroral zone during substorms.
Journal of Geophysical Research: Space Physics, 126, 2021.

10. Namekawa,T., Mitani,T., Asamura,K., Miyoshi,Y., Hosokawa,K., Ogawa,Y., et al.
Rocket observation of sub-relativistic electrons in the quiet dayside auroral ionosphere.
Journal of Geophysical Research: Space Physics, 126, 2021.

11. Kagawa,A., Hosokawa,K., Ogawa,Y., Ebihara,Y., Kadokura,A.
Occurrence distribution of polar cap patches: dependences on UT, season and hemisphere.
Journal of Geophysical Research: Space Physics, 126, 2021.

12. Bjoland,L.M., Ogawa,Y., Løvhaug,U.P., Lorentzen,D.A., Hatch,S.M., Oksavik,K.
Electron density depletion region observed in the polar cap ionosphere.
Journal of Geophysical Research: Space Physics, 126, 2021.

2020

9 papers were published in 2020.

Refereed Journal Articles

1. Nishimura,Y., M.R.Lessard, Y.Katoh, Y.Miyoshi, E.Grono, N.Partamies, N.Sivadas, K.Hosokawa, M.Fukizawa, M.Samara, R.G.Michell, R.Kataoka, T.Sakanoi, D.K.Whiter, S.Oyama, Y.Ogawa, S.Kurita
Diffuse and Pulsating Aurora.
Space Science Reviews, 216, 4, 2020.

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

3. Hosokawa,K., Kullen,A., Milan,S., et al.
Aurora in the Polar Cap: A Review.
Space Science Reviews, 216, 15, 2020.

4. Hosokawa,K., Y.Miyoshi, M.Ozaki, S.Oyama, Y.Ogawa, S.Kurita, Y.Kasahara, Y.Kasaba, S.Yagitani, S.Matsuda, F.Tsuchiya, A.Kumamoto, R.Kataoka, K.Shiokawa, T.Raita, E.Turunen, T.Takashima, I.Shinohara, R.Fujii
Multiple time-scale beats in aurora: precise orchestration via magnetospheric chorus waves.
Nature Scientific Reports, 10, 3380, 2020.

5. Oyama,S., A.Shinbori, Y.Ogawa, M.Kellinsalmi, T.Raita, A.Aikio, H.Vanhamaki, 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, M.Lester
An ephemeral red arc appeared at 68° MLat at a pseudo breakup during geomagnetically quiet conditions.
Journal of Geophysical Research: Space Physics, 125, 2020.

6. 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, R.Fujii
Development of low-cost multi-wavelength imager system for studies of aurora and airglow.
Polar Science, 23, 2020.

7. Tsuda,T.T., Li,C., Hamada,S., Hosokawa,K., Oyama,S., Nozawa,S., et al.
OI 630.0‐nm and N2 1PG emissions in pulsating aurora events observed by an optical spectrograph at Tromsø, Norway.
Journal of Geophysical Research: Space Physics, 125, 2020.

8. Billett,D.D., K.Hosokawa, A.Grocott, J.A.Wild, A.L.Aruliah, Y.Ogawa, S.Taguchi
Multi-instrument Observations of Ion-Neutral Coupling in the Dayside Cusp.
Geophysical Research Letters, 47, 2020.

9. Bjoland,L.M., Y.Ogawa, U.Lovhaug, D.Lorentzen, S.M.Hatch, K.Oksavik
Electron density depletion region observed in the polar cap ionosphere.
Journal of Geophysical Research: Space Physics, 126, 2020.

2019

7 papers were published in 2019.

Refereed Journal Articles

1. Taguchi,S., K.Hosokawa, Y.Ogawa
Plasma flow in the north-south aligned auroral region equatorward of the dayside auroral oval.
Journal of Geophysical Research: Space Physics, 124, 10778-10793, 2019.

2. Takahashi,T., I.Virtanen, K.Hosokawa, Y.Ogawa, A.Aikio, H.Miyaoka, A.Kero
Polarization electric field inside auroral patches: Simultaneous experiment of EISCAT radars and KAIRA.
Journal of Geophysical Research: Space Physics, 124, 3543-3557, 2019.

3. Ogawa,Y., K.Seki, K.Keika, Y.Ebihara
Characteristics of CME- and CIR-driven ion upflows in the polar ionosphere.
Journal of Geophysical Research: Space Physics, 124, 3637-3649, 2019.

4. Kozlovsky,A., S.Shalimov, S.Oyama, K.Hosokawa, M.Lester, Y.Ogawa, C.Hall
Ground Echoes Observed by the Meteor Radar and High-Speed Auroral Observations in the Substorm Growth Phase.
Journal of Geophysical Research: Space Physics, 124, 9278-9292, 2019.

5. Xu,H., Shiokawa,K., Oyama,S., Nozawa,S.
High-latitude thermospheric wind study using a Fabry-Perot interferometer at Tromsø in Norway: averages and variations during quiet times.
Earth, Planets and Space, 71, 110, 2019

6. Xu,H., K.Shiokawa, S.Oyama, Y.Otsuka
Thermospheric wind variations observed by a Fabry-Perot interferometer at Tromsø, Norway, at substorm onsets.
Earth, Planets and Space, 71, 93, 2019.

7. Cai,L., Oyama,S., Aikio,A., Vanhamäki,H., Virtanen,I.
Fabry-Perot interferometer observations of thermospheric horizontal winds during magnetospheric substorms.
Journal of Geophysical Research: Space Physics, 124, 3709-3728, 2019.

2018

5 papers were published in 2018.

Refereed Journal Articles

1. Nozawa,S., T.Kawabata, K.Hosokawa, Y.Ogawa, T.T.Tsuda, A.Mizuno, R.Fujii, C.M.Hall
A new five-wavelength photometer operated in Tromsø (69.6ºN, 19.2ºE).
Earth, Planets and Space,70, 193, 2018.

2. Oyama,S., T.T.Tsuda, K.Hosokawa, Y.Ogawa, Y.Miyoshi, S.Kurita, A.E.Kero, R.Fujii, Y.Tanaka, A.Mizuno, T.Kawabata, B.Gustavsson, T.Leyser
Auroral molecular-emission effects on the atomic oxygen line at 777.4 nm.
Earth, Planets and Space, 70, 166, 2018.

3. Tsuda,T.T., M.T.Rietveld, M.J.Kosch, S.Oyama, Y.Ogawa, K.Hosokawa, S.Nozawa, T.Kawabata, A.Mizuno
Survey of conditions for artificial aurora experiments by the second electron gyro-harmonic at EISCAT Tromsø using dynasonde data.
Earth, Planets and Space, 70, 94, 2018.

4. Tsuda,T.T., M.T.Rietveld, M.J.Kosch, S.Oyama, K.Hosokawa, S.Nozawa, T.Kawabata, A.Mizuno, Y.Ogawa
Survey of conditions for artificial aurora experiments at EISCAT Tromsø using dynasonde data.
Earth, Planets and Space, 70, 40, 2018.

5. Virtanen,I.I., B.Gustavsson, A.Aikio, A.Kero, K.Asamura, Y.Ogawa
Electron energy spectrum and auroral power estimation from incoherent scatter radar measurements.
Journal of Geophysical Research: Space Physics, 123, 6865-6887, 2018.

2017

9 papers were published in 2017.

Refereed Journal Articles

1. Oyama,S., Kubota,K., Morinaga,T., Tsuda,T.T., Kurihara,J., Larsen,M.F., M.Yamamoto, L.Cai
Simultaneous FPI and TMA measurements of the lower thermospheric wind in the vicinity of the poleward expanding aurora after substorm onset.
Journal of Geophysical Research: Space Physics, 122, 10864 -10875, 2017.

2. Oyama,S., A.Kero, C.J.Rodger, M.A.Clilverd, Y.Miyoshi, N.Partamies, E.Turunen, T.Raita, P.T.Verronen, S.Saito
Energetic electron precipitation and auroral morphology at the substorm recovery phase.
Journal of Geophysical Research: Space Physics, 122, 6508-6527, 2017.

3. Takahashi,T., K.Hosokawa, S.Nozawa, T.T.Tsuda, Y.Hiraki, J.Sakai, Y.Ogawa, M.Tsutsumi, H.Fujiwara, T.D.Kawahara, N.Saito, S.Wada, T.Kawabata, C.Hall
Depletion of mesospheric sodium during extended period of pulsating aurora.
Journal of Geophysical Research: Space Physics, 122, 1212-1220, 2017.

4. Bjoland,L.M., Y.Ogawa, C.Hall, M.Rietveld, U.P.Lovhaug, C.La Hoz, H.Miyaoka
Long-term variations and trends in the polar E-region.
Journal of Atmospheric and Solar-Terrestrial Physics, 163, 85-90, 2017.

5. Taguchi,S., Y.Chiba, K.Hosokawa, Y.Ogawa
Horizontal profile of a moving red line cusp aurora.
Journal of Geophysical Research: Space Physics, 122, 3509-3525, 2017.

6. Yamazaki,Y., M.J.Kosch, Y.Ogawa
Average field-aligned ion velocity over the EISCAT radars.
Journal of Geophysical Research: Space Physics, 122, 5630-5642, 2017.

7. Adachi,K., S.Nozawa, Y.Ogawa, A.Brekke,. 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 Tromsoe (69.6°N)
Earth, Planets and Space, 69, 90, 2017.

8. Sergeeva,V., N.Stepanova, Y.Ogawa, S.Kakic, K.Kauristie
Solar wind dependence of electric conductances and currents in the auroral zone.
Journal of Atmospheric and Solar-Terrestrial Physics, 177, 38-45, 2017.

9. Ivchenko,N., N.Schlatter, H.Dahlgren, Y.Ogawa, Y.Sato, I.Haggstrom
Plasma line observations from the EISCAT Svalbard Radar during the International Polar Year.
Annales Geophysicae, 35, 1143-1149, 2017.

2016

7 papers were published in 2016.

Refereed Journal Articles

1. Oyama,S.-i., K.Shiokawa, Y.Miyoshi, K.Hosokawa, B.J.Watkins, J.Kurihara, T.T.Tsuda, C.T.Fallen
Lower thermospheric wind variations in auroral patches during the substorm recovery phase.
Journal of Geophysical Research: Space Physics, 121, 3564-3577, 2016.

2. Miyoshi,Y., S.Oyama, S.Saito, S.Kurita, H.Fujiwara, R.Kataoka, Y.Ebihara, C.Kletzing, G.Reeves, O.Santolik, M.Clilverd, C.J.Rodger, E.Turunen, F.Tsuchiya
Energetic electron precipitation associated with pulsating aurora: EISCAT and Van Allen Probe observations.
Journal of Geophysical Research: Space Physics, 120, 2754-2766, 2016.

3. Tsuda,T., M.Yamamoto, H.Hashiguchi, K.Shiokawa, Y.Ogawa, S.Nozawa, H.Miyaoka A.Yoshikawa
A proposal on the study of solar-terrestrial coupling processes with atmospheric radars and ground-based observation network.
Radio Science, 51, 1587-1599, 2016.

4. Yamazaki,Y., M.J.Kosch, Y.Ogawa, D.R.Themens
High-latitude Ion Temperature Climatology during the International Polar Year 2007-2008.
J.Space Weather Space Clim., 6, A35, 13, 2016.

5. Turunen,E., A.Kero, P.T.Verronen, Y.Miyoshi, S.-I.Oyama, S.Saito
Mesospheric ozone destruction by high-energy electron precipitation associated with pulsating auora.
Journal of Geophysical Research: atmospheres, 121, 11852-11861, 2016.

6. Hosokawa,K., S.Taguchi, Y.Ogawa
Edge of polar cap patches.
Journal of Geophysical Research: Space Physics, 121, 3410-3420, 2016.

7. Hosokawa,K., S.Taguchi, Y.Ogawa
Periodic creation of polar cap patches from auroral transients in the cusp.
Journal of Geophysical Research: Space Physics, 121, 5639-5652, 2016.

2015

8 papers were published in 2015.

Refereed Journal Articles

1. Miyoshi,Y., S.Oyama, S.Saito, S.Kurita, H.Fujiwara, R.Kataoka, Y.Ebihara, C.Kletzing, G.Reeves, O.Santolik, M.Cliverd, C.J.Rodger, E.Turunen, F.Tsuchiya
Energetic electron precipitation associated with pulsating aurora: EISCAT and Van Allen Probe observations.
Journal of Geophysical Research: Space Physics, 120, 2754-2766, 2015.

2. Ieda,A., S.Oyama, H.Vanhamäki, R.Fujii, A.Nakamizo, O.Amm, T.Hori, M.Takeda, G.Ueno, A.Yoshikawa, R.J.Redmon, W.F.Denig, Y.Kamide, N.Nishitani
Approximate forms of daytime ionospheric conductance.
Journal of Geophysical Research: Space Physics, 119, 10397-10415, 2014.

3. 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, R.Fujii
A case study on generation mechanisms of a sporadic sodium layer above Tromso (69.6°N) during a night of high auroral activity.
Annales Geophysicae, 33, 941-953, 2015.

4. Hosokawa,K. Y.Ogawa
Ionospheric variation during pulsating aurora.
Journal of Geophysical Research: Space Physics, 120, 5943-5957, 2015.

5. Taguchi,S., K.Hosokawa, Y.Ogawa
Three-dimensional imaging of the plasma parameters of a moving cusp aurora.
Journal of Atmospheric and Solar-Terrestrial Physics, 133, 98-110, 2015.

6. Ishida,T., Y.Ogawa, A.Kadokura, K.Hosokawa, Y.Otsuka
Direct observations of blob deformation during a substorm.
Annales Geophysicae, 33, 525-530, 2015.

7. Taguchi,S., K.Hosokawa Y.Ogawa
Investigating the particle precipitation of a moving cusp aurora using simultaneous observations from the ground and space.
Progress in Earth and Planetary Science, 2, 11, 2015.

8. McCrea,I.W., A.Aikio, L.Alfonsi, E.Belova, S.Buchert, M.Clilverd, N.Engler, B.Gustavsson, C.Heinselman, J.Kero, M.Kosch, H.Lamy, T.Leyser, Y.Ogawa, K.Oksavik, A.Pellinen-Wannberg, F.Pitout, M.Rapp, I.Stanislawska, J.Vierninen
The science case for the EISCAT_3D radar.
Progress in Earth and Planetary Science, 2, 21, 2015.
日本語要約

2014

12 papers were published in 2014.

Refereed Journal Articles

1. 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, R.Fujii
A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data.
Annales Geophysicae, 32, 1195-1205, 2014.

2. 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.
Journal of Geophysical Research: Space Physics, 119, 8249-8261, 2014.

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

4. Ishida,T., Y.Ogawa, A.Kadokura, Y.Hiraki, I.Haggstrom
Seasonal variation and solar activity dependence of the quiet-time ionospheric trough.
Journal of Geophysical Research: Space Physics, 119, 6774-6783, 2014.

5. Ogawa,Y., T.Motoba, S.C.Buchert, I.Haggstrom, S.Nozawa
Upper atmosphere cooling over the past 33 years.
Geophysical Research Letters, 41, 5629-5635, 2014.

6. Oyama,S., Y.Miyoshi, K.Shiokawa, J.Kurihara, T.T.Tsuda, B.J.Watkins
Height-dependent ionospheric variations in the vicinity of nightside poleward expanding aurora after substorm onset.
Journal of Geophysical Research: Space Physics, 119, 4146-4156, 2014.

7. Sakai,J., K.Hosokawa, S.Taguchi, Y.Ogawa
Storm-time enhancements of 630.0-nm airglow associated with polar cap patches,
Journal of Geophysical Research: Space Physics, 119, 2214-2228, 2014.

8. Nozawa,S., T.Kawahara, N.Saito, C.Hall, T.Tsuda, T.Kawabata, S.Wada, A.Brekke, T.Takahashi, H.Fujiwara, Y.Ogawa, R.Fujii
Variations of the neutral temperature and sodium density between 80 and 107km above Tromsoe during the winter of 2010-2011 by a new solid state sodium LIDAR.
Journal of Geophysical Research: Space Physics, 119, 441-451, 2014.

9. Vickers,H., M.J.Kosch, E.Sutton, L.Bjoland, Y.Ogawa, C.La Hoz
A solar cycle of upper thermosphere density observations from the EISCAT Svalbard Radar.
Journal of Geophysical Research: Space Physics, 119, 6833-6845, 2014.

10. Kero,A., J.Vierinen, D.McKay-Bukowski, C.-F.Enell, M.Sinor, L.Roininen, Y.Ogawa
Ionospheric electron density profiles inverted from a spectral riometer measurement.
Geophysical Research Letters, 41, 5370-5375, 2014.

11. Kosch,M.J., H.Vickers, Y.Ogawa, A.Senior, N.Blagoveshchenskaya
First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT.
Geophysical Research Letters,41, 7427-7435, 2014.

12. Kosch,M.J., C.Bryers, M.T.Rietveld, T.K.Yeoman, Y.Ogawa
Aspect angle sensitivity of pump-induced optical emissions at EISCAT.
Earth, Planets and Space, 66, 159, 2014

2013

14 papers were published in 2013.

Refereed Journal Articles

1. Oyama,S., T.Watanabe, R.Fujii, S.Nozawa, 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.

2. Ogawa,Y., M.Sawatsubashi, S.C.Buchert, K.Hosokawa, S.Taguchi, S.Nozawa, S.Oyama, T.T.Tsuda, R.Fujii
Relationship between auroral substorm and ion upflow in the nightside polar ionosphere.
Journal of Geophysical Research: Space Physics, 118, 7426-7437, 2013.

3. Tanaka,Y., A.Shinbori, T.Hori, Y.Koyama, S.Abe, N.Umemura, Y.Sato, M.Yagi, S.UeNo, A.Yatagai, Y.Ogawa, Y.Miyoshi
Analysis software for upper atmospheric data developed by the IUGONET project and its application to polar science.
Advances in Polar Science, 24(4), 231-240, 2013.

4. Yoshikawa,A., O.Amm, H.Vanhamaki, R.Fujii
Theory of Cowling channel formation by reflection of shear Alfven waves from the auroral ionosphere.
Journal of Geophysical Research: Space Physics, 118, 6416-6425, 2013.

5. Yoshikawa,A., O.Amm, H.Vanhamaki, R.Fujii
Illustration of Cowling Channel Coupling to the Shear Alfven Wave.
Journal of Geophysical Research: Space Physics, 118, 2013.

6. Tsuda,T.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 Tromso, Norway,
Geophysical Research Letters, , 40, 4486-4490, 2013.

7. Matuura,N., T.Tsuda, S.Nozawa
Field-1 Aligned Current Loop Model on Formation of Sporadic Metal Layers.
Journal of Geophysical Research: Space Physics, 118, 4628-4639, 2013.

8. Sakai,J., S.Taguchi, K.Hosokawa, Y.Ogawa
Steep plasma depletion in dayside polar cap during a CME-driven magnetic storm.
J. Geophys. Res.118, 462-471, 2013.

9. Hosokawa,K., S.Taguchi, Y.Ogawa, J.Sakai
Two-dimensional direct imaging of structuring of polar cap patches.
Journal of Geophysical Research: Space Physics, 118, 6536-6543, 2013.

10. Hosokawa,K., S.Taguchi, Y.Ogawa, T.Aoki
Periodicities of polar cap patches.
Journal of Geophysical Research: Space Physics, 118, 447-453, 2013.

11. Ogawa,Y., A.Kadokura, T.Motoba, Y.Tanaka, K.Hosokawa
Processing and visualization of large amounts of auroral data obtained with All-sky/Narrow field-of-view parallel imagers in Tromso and Longyearbyen.
Journal of Space Science Informatics Japan, vol.2, 51-61, 2013. (written in Japanese)
小川泰信, 門倉昭, 元場哲郞, 田中良昌, 細川敬祐
トロムソ/ロングイアビンにおけるオーロラ観測用並列イメージャーの大量データ処理と可視化.
宇宙科学情報解析論文誌, vol.2, 51-61, 2013.

12. Tanaka,Y., A.Shinbori, N.Umemura, T.Hori, S.Abe, Y.Koyama, H.Hayashi, S.Ueno,
Y.Sato, A.Yatagai, Y.Ogawa, Y.Miyoshi, K.Seki, Y.Miyashita, T.Segawa
Current status and future development of IUGONET data analysis software.
Journal of Space Science Informatics Japan, vol.2, 63-70, 2013. (written in Japanese)
田中良昌, 新堀淳樹, 梅村宜生, 堀智昭, 阿部修司, 小山幸伸, 林寛生, 上野悟,
佐藤由佳, 谷田貝亜紀代, 小川泰信, 三好由純, 関華奈子, 宮下幸長, 瀨川朋紀
IUGONET 解析ソフトウェアの現状と今後の発展.
宇宙科学情報解析論文誌, vol.2, 63-70, 2013.

13. Amm,O., R.Fujii, H.Vanhamaki, A.Yoshikawa, A.Ieda
General solution for calculating polarization electric fields in the auroral ionosphere and application examples.
Journal of Geophysical Research: Space Physics, 118, 2428-2437, 2013..

14. Vickers,H., M.J.Kosch, E.Sutton, Y.Ogawa, C.La Hoz
Thermospheric atomic oxygen density estimates using the EISCAT Svalbard Radar.
Journal of Geophysical Research: Space Physics, 118, 1319-1330, 1319-1330, 2013.

2012

11 papers were published in 2012.

Refereed Journal Articles

1. 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.
Journal of Atmospheric and Solar-Terrestrial Physics, vol.90-91, 26-44, 2012.

2. Sato,Y., T.Ono, N.Sato, Y.Ogawa
First observations of 4fce auroral roar emissions.
Geophysical Research Letters, vol.39, 2012.

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

4. Taguchi,S., K.Hosokawa, Y.Ogawa, T.Aoki, M.Taguchi
Double bursts inside a poleward-moving auroral form in the cusp.
Journal of Geophysical Research: Space Physics, vol.117, 2012.

5. Fujii,R., O.Amm, H.Vanhamaki, A.Yoshikawa, A.Ieda
An application of the finite length Cowling channel model to auroral arcs with longitudinal variations.
Journal of Geophysical Research: Space Physics, vol.117, 2012.

6. Oyama,S., J.Kurihara, B.J.Watkins, T.T.Tsuda, T.Takahashi
Temporal variations of the ion-neutral collision frequency from EISCAT observations in the polar lower ionosphere during periods of geomagnetic disturbances.
Journal of Geophysical Research: Space Physics, vol.117, 2012.

7. Ogawa,Y., S.Nozawa, I.Haggstrom, S.Oyama, T.Motoba, T.Tsuda, A.Saito, Y.Miyashita, Y.Tanaka, T.Hori, G.Ueno, H.Miyaoka, R.Fujii
Large-scale data processing and visualization of the European incoherent scatter (EISCAT) radar system.
Journal of Space Science Informatics Japan, vol.1, 83-89, 2012. (written in Japanese)
小川泰信, 野澤悟徳, I.Haggstrom, 大山伸一郎, 元場哲郎, 津田卓雄,
齋藤昭則, 宮下幸長, 田中良昌, 堀智昭, 上野玄太, 宮岡宏, 藤井良一
欧州非干渉散乱（EISCAT）レーダーの大規模データ処理と可視化.
宇宙科学情報解析論文誌, vol.1, 83-89, 2012.

8. Tanaka,Y., A.Shinbori, M.Kagitani, T.Hori, S.Abe, Y.Koyama, H.Hayashi,
D.Yoshida, T.Kono, S.Ueno, N.Kaneda, M.Yoneda, H.Tadokoro, T.Motoba,
Y.Miyoshi, K.Seki, Y.Miyashita, T.Segawa, Y.Ogawa
Development of IUGONET data analysis software.
Journal of Space Science Informatics Japan, vol.1, 91-98, 2012. (written in Japanese)
田中良昌, 新堀淳樹, 鍵谷将人, 堀智昭, 阿部修司, 小山幸伸, 林寛生,
吉田大紀, 河野貴久, 上野悟, 金田直樹, 米田瑞生, 田所裕康, 元場哲郎,
三好由純, 関華奈子, 宮下幸長, 瀨川朋紀, 小川泰信
IUGONET解析ソフトウェアの開発.
宇宙科学情報解析論文誌, vol.1, 91-98, 2012.

9. Vanhamaki,H., A.Yoshikawa, O.Amm, R.Fujii
Ionospheric Joule heating and Poynting flux in quasi-static approximation.
Journal of Geophysical Research: Space Physics, 117, 2012.

10. Gorin,J.D., A.V.Koustov, R.A.Makarevich, J.-P.St.-Maurice, S.Nozawa
Velocity of E-region HF echoes under strongly-driven electrojet conditions.
Annales Geophysicae, 30, 235-250, 2012.

11. Lund,E.J., M.R.Lessard, F.Sigernes, D.A.Lorentzen, K.Oksavik, P.M.Kintner, K.A.Lynch, D.H.Huang, B.C.Zhang, H.G.Yang, Y.Ogawa
Electron temperature in the cusp as measured with the SCIFER-2 sounding rocket.
Journal of Geophysical Research: Space Physics, 117, 2012.