S
Seiji Kawamura
Researcher at National Institute of Information and Communications Technology
Publications - 32
Citations - 1027
Seiji Kawamura is an academic researcher from National Institute of Information and Communications Technology. The author has contributed to research in topics: Ionosphere & Thermosphere. The author has an hindex of 11, co-authored 32 publications receiving 894 citations.
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Journal ArticleDOI
An empirical model of the Earth's horizontal wind fields: HWM07
Douglas P. Drob,J. T. Emmert,Geoff Crowley,J. M. Picone,Gordon G. Shepherd,Wilbert R. Skinner,Paul B. Hays,Rick J. Niciejewski,Miguel Larsen,Chiao-Yao She,John W. Meriwether,G. Hernandez,Martin J. Jarvis,D. P. Sipler,Craig A. Tepley,M. S. O'Brien,J. R. Bowman,Qian Wu,Yasuhiro Murayama,Seiji Kawamura,Iain M. Reid,Robert A. Vincent +21 more
TL;DR: The Horizontal Wind Model (HWM07) as mentioned in this paper provides a statistical representation of the horizontal wind fields of the Earth's atmosphere from the ground to the exosphere (0-500 km).
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A physical mechanism of positive ionospheric storms at low latitudes and midlatitudes
N. Balan,N. Balan,Kazuo Shiokawa,Yuichi Otsuka,Takashi Kikuchi,D. Vijaya Lekshmi,Seiji Kawamura,Mamoru Yamamoto,G. J. Bailey +8 more
TL;DR: In this article, a physical mechanism of the positive ionospheric storms at low latitudes and midlatitudes is presented through multi-instrument observations, theoretical modeling, and basic principles.
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A climatology of middle and upper atmosphere radar observations of thermospheric winds
TL;DR: Shigaraki radar observations of horizontal thermospheric winds in the magnetic meridian plane over the period September 1986 to September 1996 are reported as climatological averages in the form of time-of-day variations for several combinations of seasonal and solar activity conditions and are compared with winds predicted by the horizontal wind model (HWM) and with winds measured at Saint Santin and Millstone Hill.
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Latitudinal wave coupling of the stratosphere and mesosphere during the major stratospheric warming in 2003/2004
Dora Pancheva,Dora Pancheva,Plamen Mukhtarov,Nicholas J. Mitchell,B. Andonov,E. G. Merzlyakov,Werner Singer,Yasuhiro Murayama,Seiji Kawamura,J. Xiong,W. Wan,Wayne K. Hocking,David C. Fritts,Dennis M. Riggin,Chris Meek,A. H. Manson +15 more
TL;DR: In this paper, the coupling of the dynamical regimes in the high and low-latitude stratosphere and mesosphere during the major SSW in the Arctic winter of 2003/2004 has been studied.
Journal ArticleDOI
Plasma temperature variations in the ionosphere over the middle and upper atmosphere radar
TL;DR: In this article, the temperature variations in the ionosphere over the middle and upper atmosphere radar at Shigaraki (34.85°N, 136.10°E, magnetic latitude 25°N) in Japan are studied using the electron and ion temperature data measured by the radar during nearly a full solar cycle (1986-1995).