日本地球惑星科学連合2014年大会

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インターナショナルセッション(口頭発表)

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

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

2014年4月30日(水) 16:15 〜 17:30 213 (2F)

コンビーナ:*佐藤 光輝(北海道大学 大学院理学研究院)、足立 透(早稲田大学高等研究所)、牛尾 知雄(大阪大学大学院工学研究科情報通信工学部門)、高橋 幸弘(北海道大学・大学院理学院・宇宙理学専攻)、座長:佐藤 光輝(北海道大学 大学院理学研究院)、山下 幸三(サレジオ工業高等専門学校 電気工学科)

16:45 〜 17:00

[PEM07-10] 1-100Hz帯磁場観測と0.1-40kHz帯電磁界観測に基づいた落雷活動の監視

*山下 幸三1大矢 浩代2高橋 幸弘3土屋 史紀4佐藤 光輝3 (1.サレジオ工業高等専門学校、2.千葉大学、3.北海道大学、4.東北大学)

キーワード:雷, 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.