JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Poster

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

[P-EM12] [EE] Space Weather, Space Climate, VarSITI

Tue. May 23, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Ryuho Kataoka(National Institute of Polar Research), Antti A Pulkkinen(NASA Goddard Space Flight Center), Kanya Kusano(Institute for Space-Earth Environmental Research, Nagoya University), Kazuo Shiokawa(Institute for Space-Earth Environmental Research, Nagoya University)

[PEM12-P21] Long-term variation of Schumann resonance parameters at Kuju station

*Akihiro Ikeda1, Teiji Uozumi2, Akimasa Yoshikawa3, Akiko Fujimoto2, Shuji Abe2, Hiromasa Nozawa1 (1.NIT, Kagoshima College, 2.ICSWSE, Kyushu Univ., 3.Department of Earth and Planetary Sciences, Kyushu Univ.)

Keywords:Schumann resonance, solar activity

The Schumann resonance (SR) is the global resonance of electromagnetic waves generated by global lightning activity. The resonance is formed by the Earth-ionosphere cavity and the specific resonance frequency appears in ground magnetic field variation. Expectations for the SR have increased recently as an indicator of global and regional lightning activity. In order to use the SR parameters for studying such earth’s climate, we need a better understanding of the long-term variations of the SR. In this study, we focused on the long-term variation of the SR at Kuju, Japan (KUJ; M.Lat. = 23.4 degree, M. Lon. = 201.0 degree).
The ground magnetic field variation in the extremely low frequency (ELF) range has been measured by an induction magnetometer at KUJ since 2003. The observation is a part of activities by International Center for Space Weather Science and Education Kyushu University.
The fundamental mode of the Schumann resonance (SR1) around 8 Hz can be seen at KUJ. The peak frequency of SR1 correlates with F10.7. Also the correlation between SR1 amplitude and F10.7 reveals. The SR parameters seem to be affected by the ionospheric conditions which change depending on solar activity.