Japan Geoscience Union Meeting 2015

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Poster

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM28] Dynamics in magnetosphere and ionosphere

Wed. May 27, 2015 6:15 PM - 7:30 PM Convention Hall (2F)

Convener:*Yoshizumi Miyoshi(Solar-Terrestrial Environement Laboratory, Nagoya University), Hiroshi Hasegawa(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Shin'ya Nakano(The Institute of Statistical Mathematics), Yoshimasa Tanaka(National Institute of Polar Research), Tomoaki Hori(Nagoya University Solar Terrestrial Environment Laboratory Geospace Research Center)

6:15 PM - 7:30 PM

[PEM28-P05] Ionospheric currents induced by Dst field and their effects on the geomagnetic field variation

*Masahiko TAKEDA1 (1.Data Analysis Center for Geomagnetism and Space Magnetism., Kyoto Univ.)

Keywords:Dst field, induced ionospheric currents, geomagnetic field variation

Ionospheric currents induced by Dst field were simulated, and their effects on the geomagnetic field variation was estimate. It was found that a vortex current system is induced in the dayside ionosphere for the variation of less than 10 minutes because of the lower nighttime conductivity, and causes geomagnetic field variation in the Y-component.