Development of the observation network for comprehensive study on giant thunderstorm, Hector

2009 Fiscal Year Final Research Report

• Project/Area Number: 18253004
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Osaka University
• Principal Investigator: KAWASAKI Zen-ichiro Osaka University, 工学研究科, 教授 (60126852)
• Co-Investigator(Kenkyū-buntansha): USHIO Tomoo 大阪大学, 工学研究科, 准教授 (50332961) ; MORIMOTO Takeshi 大阪大学, 工学研究科, 講師 (60403169) ; TAKAGI Nobuyuki 岐阜大学, 工学部, 教授 (80179415) ; WANG Daohong 岐阜大学, 工学部, 准教授 (20273120) ; NAKAJIMA Teruyuki 東京大学, 気候システム研究センター, 教授 (60124608) ; HAYASHI Syugo 気象庁気象研究所, 予報研究部, 研究官 (20354441)
• Research Collaborator: ARTHUR Jim , オーストラリア気象局 ; MAY Peter , オーストラリア気象局 ; CHRISTIAN Hugh , アメリカ航空宇宙局 ; WILLIAMS Earle マサチューセッツ工科大学 ; HOELLER Hartmut , ドイツ航空宇宙センター
• Project Period (FY): 2006 – 2009
• Keywords: 自然現象観測 / 気象学 / 大気電気学 / 観測ネットワーク / モデリング

Research Abstract

We have conducted field campaign in Darwin, Australia to study on giant thunderstorm, Hector by means of our original combined lightning observation network with meteorological equipments operated by Bureau of Meteorology Australia. Lightning leader channels with long horizontal developments are successfully visualized. It is concluded that the horizontal long negative leaders in cloud-to-ground flashes progress along the boundary of positive charge region. When the leaders reach the end of the positive charge regions, they change their direction to downward. An innovative estimation for charge distributions neutralized by lightning flashes is tried out. Ascent of positive charge with Hector developments is noticed.

Research Products

• [Journal Article] Lightning channels of cloud-to-ground flashes neutralizing multiple charge regions inside winter thunderclouds (2010)
  • Author(s): M. Akita, S. Yohida, Y. Nakamura, T. Morimoto, T. Ushio, Z.-I. Kawasaki, D. Wnag
  • Journal Title: IEEJ Transactions on Fundamentals and Materials vol.130-A,no.5 Pages: 467-472
  • Peer Reviewed
• [Journal Article] What occurs in K-process of cloud flashes (2010)
  • Author(s): M. Akita, Y. Nakamura, S. Yoshida, T. Morimoto, T. Ushio, Z. Kawasaki, D. Wang
  • Journal Title: Journal of Geophysical Research vol.115,D07106 Pages: doi:10. 1029/2009JD012016
  • Peer Reviewed
• [Journal Article] ENSO and convective activities in Southeast Asia and western Pacific (2007)
  • Author(s): S. Yoshida, T. Morimoto, T. Ushio, Z. Kawasaki
  • Journal Title: Geophysical Research Letters vol.34,L21806 Pages: doi:10. 1029/2007GL030758
  • Peer Reviewed
• [Journal Article] Measurements of reactive nitrogen produced by tropical thunderstorms during BIBLE-C (2007)
  • Author(s): M. Koike, Y. Kondo, K. Kita, N. Takegawa, N. Nishi, T. Kashihara, S. Kawakami, S. Kudoh, D. Blake, T. Shirai, B. Liley, M. Ko, Y. Miyazaki, Z. Kawasaki, T. Ogawa
  • Journal Title: Journal of Geophysical Research Vol.112,D18304 Pages: doi:10. 1029/2006JD008193
  • Peer Reviewed
• [Journal Article] VHF broadband digital interferometer (2006)
  • Author(s): T. Morimoto, Z. Kawasaki
  • Journal Title: Transactions on Electrical and Electronic Engineering vol.1,Issue2 Pages: 140-144
  • Peer Reviewed
• [Presentation] 広帯域干渉計を用いた雷放電の進展様相および中和電荷量に関する考察 (2010)
  • Author(s): 秋田, 村田, 中村, 吉田, 森本, 牛尾, 河崎, 山本
  • Organizer: 日本大気電気学会第82回研究発表会
  • Place of Presentation: 東京
  • Year and Date: 20100100
• [Presentation] 雷放電と降水粒子の微物理過程 (2009)
  • Author(s): 中村, 秋田, 森本, 牛尾, 河崎
  • Organizer: 日本気象学会2009年度秋季大会
  • Place of Presentation: 福岡
  • Year and Date: 20091100
• [Presentation] 2008年ダーウィンにおける三次元雷嵐観測の概要と結果 (2009)
  • Author(s): 村田, 米多, 秋田, 中村, 吉田, 森本, 牛尾, 河崎, 山本
  • Organizer: 2009年電気関係学会関西支部連合大会
  • Place of Presentation: 大阪
  • Year and Date: 20091100
• [Presentation] 雷観測用VLF/LF帯広帯域ディジタル干渉法による雷放電標定システムの開発 (2009)
  • Author(s): 高柳, 秋田, 中村, 森本, 牛尾, 河崎
  • Organizer: 2009年度電気学会基礎・材料・共通部門大会
  • Place of Presentation: 静岡
  • Year and Date: 20090900
• [Presentation] Charge distributions for cloud-to-ground flashes with horizontally long leaders (2009)
  • Author(s): M. Akita, T. Morimoto, T. Ushio, Z. Kawasaki
  • Organizer: 日本地球惑星科学連合2009年大会
  • Place of Presentation: 千葉
  • Year and Date: 20090500
• [Presentation] オーストラリア・ダーウィンの雷雲における放電開始点と放電頻度 (2009)
  • Author(s): 村田, 秋田, 吉田, 中村, 森本, 牛尾, 河崎
  • Organizer: 日本大気電気学会第80回研究発表会
  • Place of Presentation: 東京
  • Year and Date: 2009-01-08
• [Presentation] Spider-like lightning observation using VHF broadband digital interferometer (2008)
  • Author(s): Y. Nakamura, K. Murata, T. Morimoto, T. Ushio, Z. Kawasaki
  • Organizer: AGU 2008 Fall Meeting
  • Place of Presentation: California, U.S.A.
  • Year and Date: 2008-12-15
• [Presentation] Comprehensive thunderstorm observations by the broadband radar network (2008)
  • Author(s): T. Morimoto, T. Ushio, Z. Kawasaki
  • Organizer: The XXIXth URSI General Assembly
  • Place of Presentation: Illinois, U.S.A.
  • Year and Date: 2008-08-11
• [Presentation] VHF波帯広帯域ディジタル干渉計を用いたK変化を伴う雲放電観測 (2008)
  • Author(s): 秋田, 佐藤, 森本, 牛尾, 河崎
  • Organizer: 日本地球惑星科学連合2008年大会
  • Place of Presentation: 千葉
  • Year and Date: 2008-05-29
• [Presentation] Three-dimensional VHF observations using advanced VHF broadband digital interferometer (2007)
  • Author(s): M. Akita, K. Hirai, M. Satoh, Y. Nakamura, T. Morimoto, T. Ushio, Z. Kawasaki
  • Organizer: 13th International Conference on Atmospheric Electricity (ICAE)
  • Place of Presentation: Beijing, China
  • Year and Date: 2007-08-17
• [Book] 雷に魅せられて～カミナリ博士、その謎を追う～ (2008)
  • Author(s): 河崎善一郎, 化学同人
  • Total Pages: 200
  • Publisher: 化学同人