Small Winter Thunderstorm with Sprites and Strong Positive Discharge

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2011/09/01

タイトル(英語): Small Winter Thunderstorm with Sprites and Strong Positive Discharge

著者名: Tomoyuki Suzuki (Air Weather Group, Japan Air Self-Defense Force), Masashi Hayakawa (Advanced Wireless Communications Research Center and Research Station on Seismo Electromagnetics, The University of Electro-Communications), Koichiro Michimoto (Department of Strategic Studies, National Defense Academy of Japan)

著者名(英語): Tomoyuki Suzuki (Air Weather Group, Japan Air Self-Defense Force), Masashi Hayakawa (Advanced Wireless Communications Research Center and Research Station on Seismo Electromagnetics, The University of Electro-Communications), Koichiro Michimoto (Department of Strategic Studies, National Defense Academy of Japan)

キーワード: winter thunderstorms，sprites，positive cloud-to-ground discharges

要約(英語): A sprite campaign was conducted in the Hokuriku area of Japan during a winter of 2004/2005. On the basis of a combined analysis of the data from various instruments (CCD cameras, radar, VHF/LF∼MF lightning mapping system, field mill network, and ELF detector), we studied meteorological and electrical structures for winter thunderstorms and sprite-producing positive discharge. Typical winter sprite parent thunderstorms had a meso-scale cloud area with embedded small convective cells. Some small winter thunderstorms accompanied by the most frequent sprite events were found to cause 2∼3 sprite events during a short interval of about 3∼5 min. When the sprites were observed, the extent of the convective cells at 20 dBZ counter was atmost ∼20 × 20 km. The VHF sources associated with sprites were located near south of the convective cell and were mapped within very small areas of at most ∼10 × 10 km. This fact shows that some small winter thunderstorms can generate large positive charge associated with sprites. We will present the analysis of such a small thunderstorms with sprites and positive lightning discharges.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.131 No.9 （2011） 特集：自然災害軽減のための電磁界技術

本誌掲載ページ: 723-728 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/131/9/131_9_723/_article/-char/ja/