Japan Geoscience Union Meeting 2014

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International Session (Oral)

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

[P-EM07_30PM2] Lightning and TLEs and their effects on the lower and middle atmosphere

Wed. Apr 30, 2014 4:15 PM - 5:30 PM 213 (2F)

Convener:*Mitsuteru Sato(Department of Cosmoscience, Hokkaido University), Toru Adachi(Waseda Institute for Advanced Study, Waseda University), Tomoo Ushio(Information and communication engineering department, Osaka University), Yukihiro Takahashi(Department of Cosmosciences, Graduate School of Science, Hokkaido University), Chair:Mitsuteru Sato(Department of Cosmoscience, Hokkaido University), Kozo Yamashita(Dept.Electrical Engineering, Salesian Polytechnic.)

4:45 PM - 5:00 PM

★ [PEM07-10] Monitoring of lightning activity in the Maritime Continent based on radio observation in 1-100 Hz band and 0.1-40 kHz ba

*Kozo YAMASHITA1, Hiroyo OHYA2, Yukihiro TAKAHASHI3, Fuminori TSUCHIYA4, Mitsuteru SATO3 (1.S, 2.Chiba University, 3.Hokkaido University, 4.Tohoku University)

Keywords:lightning, ELF, VLF, the Maritime Continent, charge moment

Based on measurement of electromagnetic wave radiated from lightning discharge, we can estimate location and electrical properties of each event. In the recent studies, lightning data is focused on as an effective proxy for the monitoring of thunderstorm that causes severe weather. In the previous works, occurrence of lightning discharge has been mainly used. However, recent observation indicates that there is huge lightning whose scale is more than hundreds times bigger than that of averaged one. Lightning data including ″occurrence″ and ″scale″ makes it possible to monitor thunderstorm activity quantitatively. In this works, lightning observation network in the MC based on electromagnetic measurement in ELF and VLF band is summarized. This network is developed to estimate not only spatial distribution but also scale one of lightning discharges. We have already installed receivers in 0.1-40 kHz band at Tainan in Taiwan (23.1N, 121.1E), Saraburi in Thailand (14.5N, 101.0E), Pontianak in Indonesia (0.0N, 109.4E), Los Banos in Philippines (14.2N, 121.25E) and Son Tay in Viet Nam (21.1N, 105.5E). For ELF observation, receiver in 1-100 Hz is installed in Onagawa, Japan (38.4N, 141.5E). Data obtained by multipoint observation is synchronized by GPS receiver installed at each station.At the presentation, we will show the initial result to derive scale distribution of based on the measurement of ELF and VLF sferics.