Observational investigation for effects of the lightning discharges in South-east Asia on the D/E-region ionosphere

• Project/Area Number: 25302005
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Space and upper atmospheric physics
• Research Institution: Chiba University
• Principal Investigator: Ohya Hiroyo 千葉大学, 工学(系)研究科(研究院), 助教 (00241943)
• Co-Investigator(Kenkyū-buntansha): TAKAHASHI Yukihiro 北海道大学, 大学院理学研究院, 教授 (50236329) ; TSUCHIYA Fuminori 東北大学, 大学院理学研究科, 助教 (10302077) ; YAMASHITA Kozo サレジオ工業高等専門学校, 電気工学科, 講師 (20609911)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000); Fiscal Year 2015: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000); Fiscal Year 2013: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
• Keywords: 雷放電 / EMP / 下部電離圏 / VLF/LF帯電磁波 / D領域電離圏 / 超高層物理学 / 電離圏

Outline of Final Research Achievements

During 2013-2015 physical years, we could install new VLF observation system in Philippines and Vietnam to reveal the effects of lightning discharges on the lower ionosphere. All the five observation stations of Asia VLF Observation Network (AVON) were completed. By analyzing the AVON data, the following results were obtained.
(1)　The phase change strongly depends in both strength of EMP and distance of causative lightning from the 1-hop point, if the strength of the EMP exceeds the breakdown electric field at 90 km altitude. (2) Outside of these distances, the phase decreases (which correspond to the ionization decrease) was found. Intensity of EMP degreases as distance from a causative lightning. When the electric filed strength becomes lower than the breakdown threshold, electron attachment rate dominates ionization rate, causing decrease in ionization. This suggests that EMP does not affect ionization state in the lower ionosphere just above lightning.

Research Products

• [Int'l Joint Research] 国立成功大学(台湾)
• [Int'l Joint Research] チュラロンコン大学(タイ)
• [Int'l Joint Research] インドネシア航空宇宙研究所（LAPAN）(インドネシア)
• [Int'l Joint Research] フィリピン大気地球物理天文サービス局(PAGASA)(フィリピン)
• [Int'l Joint Research] 国立水文気象サービス超高層気象観測所(AMO)(インドネシア)
• [Journal Article] Energetic electron precipitation associated with pulsating aurora: EISCAT and Van Allen Probe observation (2015)
  • Author(s): Y. Miyoshi, S. Oyama, S. Saito, S. Kurita, H. Fujiwara, R. Kataoka, Y. Ebihara, C. Kletzing, G. Reeves, O. Santolik, M. Clilverd, C. Rodger, E. Turunen, and F. Tsuchiya
  • Journal Title: J. Geophys. Res. Space Physics Volume: 120 Issue: 4 Pages: 1-13
  • DOI: 10.1002/2014ja020690
  • Peer Reviewed / Open Access
• [Presentation] 陸別・国内におけるLF帯標準電波観測 (2016)
  • Author(s): 土屋史紀、森永洋介、小原隆博、三澤浩昭、佐藤光輝、本間規泰、大矢浩代
  • Organizer: 陸別観測所ユーザーズミーティング
  • Place of Presentation: 陸別，北海道
  • Year and Date: 2016-03-28
• [Presentation] Energetic electron precipitation into the atmosphere at auroral and sub-auroral latitudes during storm and substorm periods: Low frequency radio transmitter observation in north Europe and America (2016)
  • Author(s): Tsuchiya, F., T. Obara, H. Misawa, T. Sakanoi, Y. Miyoshi, K. Shiokawa, Y. Ogawa, M. Connors, and D. Hampton
  • Organizer: International GEMSIS and ASINACTR-G2602 Workshop: Future Perspectives of Researches in Space Physics
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2016-03-22
  • Int'l Joint Research
• [Presentation] Relationships between typhoon occurrence, thunderstorm activity and solar parameters (2016)
  • Author(s): Takahashi, Y.
  • Organizer: The International Science Conference on MAHASRI
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2016-03-03
  • Int'l Joint Research
• [Presentation] Monitoring of thunderstorm electrification Based on electromagnetic and electrostatic measurement in the metropolitan region (2016)
  • Author(s): Yamashita. K., Y. Kubono, Y. Takahashi, J. Hamada, J. Matsumoto
  • Organizer: The International Science Conference on MAHASRI
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2016-03-02
  • Int'l Joint Research
• [Presentation] Ground Network Observations for the ERG Project (2015)
  • Author(s): Shiokawa K., Abe, S, Fujii, R., Hashimoto, K., Hosokawa, K., Ishii, M., Kadokura A., Kawano H., Kikuchi T., Kitamura K., Miyoshi Y., Nagatsuma T., Nishitani N., Obana Y., Ogawa Y., Ohya H., Okada M., Otsuka Y., Oyama S., Ozaki M., Saita S., Sato N., Shinohara M., Tadokoro H., Taguchi M., Tsuchiya F., et al.
  • Organizer: ISAS Workshop: Magnetospheric Plasmas 2015
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2015-12-01
  • Int'l Joint Research
• [Presentation] Future plan of AVON (Asia VLF Observation Network) and cooperation with other ground-based network and satellite projects (2015)
  • Author(s): Ohya, H., F. Tsuchiya, K. Yamashita, Y. Takahashi, and Y. Miyoshi
  • Organizer: Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS) 2015 Fall Meeting
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2015-10-31
  • Int'l Joint Research
• [Presentation] Nighttime periodicity for the phase of LF transmitter signals (2015)
  • Author(s): 大矢浩代，土屋史紀, 西岡未知，塩川和夫
  • Organizer: 地球電磁気・地球惑星圏学会第138回講演会
  • Place of Presentation: 東京大学（東京）
  • Year and Date: 2015-10-31
• [Presentation] Evaluation of detection efficiency of lightning distribution in the Kanto region based on radio measurement in VLF range (2015)
  • Author(s): 山下幸三, 高橋幸弘, 濱田純一, 松本淳, 大矢浩代, 土屋史紀
  • Organizer: 地球電磁気・地球惑星圏学会第138回講演会
  • Place of Presentation: 東京大学（東京）
  • Year and Date: 2015-10-31
• [Presentation] VLF帯電界計測に基づいた関東圏落雷観測網の性能評価 (2015)
  • Author(s): 山下 幸三, 高橋 幸弘, 濱田 純一, 松本 淳, 大矢 浩代, 土屋 史紀
  • Organizer: 地球電磁気・地球惑星圏学会第138回講演会
  • Place of Presentation: 東京大学（東京）
  • Year and Date: 2015-10-31
• [Presentation] Dual frequency observation of subionospheric perturbations associated with Hokuriku winter lightning (2015)
  • Author(s): Morinaga、Y., F. Tsuchiya, T. Obara, H. Misawa, and Y. Honma
  • Organizer: Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS) 2015 Fall Meeting
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2015-10-31
  • Int'l Joint Research
• [Presentation] 関東落雷観測網の構築と今後の課題 (2015)
  • Author(s): 山下幸三、高橋幸弘、濱田純一、松本淳
  • Organizer: 第9回MUレーダー・赤道大気レーダーシンポジウム
  • Place of Presentation: 京都
  • Year and Date: 2015-09-10
• [Presentation] VLF帯電磁界計測に基づいた関東圏における落雷観測の初期結果 (2015)
  • Author(s): 山下幸三, 高橋幸弘
  • Organizer: 2015年電子情報通信学会 ソサエティ大会
  • Place of Presentation: 仙台
  • Year and Date: 2015-09-09
• [Presentation] Statistical Study of Nighttime Periodic Phase Variations in LF Transmitter Signals at Mid-Low Latitudes (2015)
  • Author(s): Ohya, H., F. Tsuchiya, M. Nishioka, K. Shiokawa, K. Yamashita, and Y. Takahashi
  • Organizer: Asia Oceania Geosciences Society (AOGS) 2015
  • Place of Presentation: Singapore
  • Year and Date: 2015-08-03
  • Int'l Joint Research
• [Presentation] Thunderstorm activity monitored by super dense network with electromagnetic sensors (2015)
  • Author(s): Takahashi, Y., and M. Sato
  • Organizer: Asia Oceania Geosciences Society (AOGS) 2015
  • Place of Presentation: Singapore
  • Year and Date: 2015-08-03
  • Int'l Joint Research
• [Presentation] Monitoring of thunderstorm activity by super dense network with electromagnetic filed sensors (2015)
  • Author(s): Takahashi, Y.
  • Organizer: 26th International Union of Geodesy and Geophysics (IUGG) General Assembly 2015
  • Place of Presentation: Prague, Czech Republic
  • Year and Date: 2015-06-30
  • Int'l Joint Research
• [Presentation] Earth’s sprites/lightning measurements from satellites, aircraft, balloons and international space stations (2015)
  • Author(s): Takahashi, Y.
  • Organizer: Summer radio astromony school in Mongolia
  • Place of Presentation: National University of Mongolia
  • Year and Date: 2015-06-25
  • Int'l Joint Research / Invited
• [Presentation] Relationship between phase variation of LF signals and GPS-TEC variations related with MSTIDs at mid-low latitudes (2015)
  • Author(s): Ohya, H., M. Nishioka, K. Shiokawa, and F. Tsuchiya
  • Organizer: Japan Geoscience Union Meeting (JpGU) 2015
  • Place of Presentation: Chiba, Japan
  • Year and Date: 2015-05-24
  • Int'l Joint Research
• [Presentation] Variations of sferic waveforms in VLF range observed by AVON (2015)
  • Author(s): Onishi, S., Y. Takahashi, and K. Yamashita
  • Organizer: Japan Geoscience Union Meeting (JpGU) 2015
  • Place of Presentation: Chiba, Japan
  • Year and Date: 2015-05-24
• [Presentation] Wide energy electron precipitation associated with the pulsating aurora and its impact on the middle atmosphere (2015)
  • Author(s): Miyoshi, Y., S. Oyama, S. Saito, S. Kurita, H. Fujiwara, R. Kataoka, Y.Ebihara, C. Kletzing, G. Reeves, O. Santolik, M. Clilverd, C. Rodger, E.Turunen, and F. Tsuchiya
  • Organizer: Japan Geoscience Union Meeting (JpGU) 2015
  • Place of Presentation: Chiba, Japan
  • Year and Date: 2015-05-24
  • Int'l Joint Research
• [Presentation] Comprehensive observations on the pulsating aurora from satellite and ground-observations (2015)
  • Author(s): Miyoshi, Y., S. Oyama, S. Saito, S. Kurita, H. Fujiwara, R. Kataoka, Y. Ebihara, C. Kletzing, G. Reeves, O. Santolik, M. Clilverd, C. Rodger, E. Turunen, and F. Tsuchiya
  • Organizer: Japan Geoscience Union Meeting (JpGU) 2015
  • Place of Presentation: Chiba, Japan
  • Year and Date: 2015-05-24
  • Int'l Joint Research
• [Presentation] 北陸冬季雷と関連する下部電離圏擾乱の二周波観測 (2015)
  • Author(s): 森永 洋介, 土屋 史紀, 小原 隆博, 三澤 浩昭, 本間 規泰
  • Organizer: 日本地球惑星科学連合 連合大会 2015年大会
  • Place of Presentation: 幕張メッセ（千葉）
  • Year and Date: 2015-05-24
• [Presentation] Thunderstorm monitoring with VLF network and super dense meteorological observation system (2015)
  • Author(s): Takahashi, Y., and M. Sato
  • Organizer: EGU General Assembly 2015
  • Place of Presentation: Vienna, Asutria
  • Year and Date: 2015-04-16
  • Int'l Joint Research
• [Presentation] New observation systems for disaster monitoring with ground lightning networks and micro-satellite constellation (2015)
  • Author(s): Takahashi, Y.
  • Organizer: International Workshop on Disaster Risk Reduction under the e-ASIA Joint Research Program and Typhoon Yolanda related J-RAPID Program
  • Place of Presentation: Quezon City, Philippines
  • Year and Date: 2015-04-15
  • Int'l Joint Research / Invited
• [Presentation] LF標準電波/AVONネットワークによる降下電子観測 (2015)
  • Author(s): 大矢浩代, 土屋史紀, 山下幸三, 高橋幸弘, 小原隆博
  • Organizer: 第6回ERGサイエンス会議
  • Place of Presentation: 名古屋大学
  • Year and Date: 2015-03-13
• [Presentation] VLF/LF波で探る下部電離圏の電離現象 (2015)
  • Author(s): 土屋史紀, 森永洋介, 小原隆博, 三澤浩昭, 本間規泰, 大矢浩代, 高橋幸弘, 佐藤光輝, 山下幸三, 足立透
  • Organizer: 陸別ユーザーズミーティング
  • Place of Presentation: 陸別
  • Year and Date: 2015-03-13
• [Presentation] 東南アジア域におけるVLF帯空電観測 (2015)
  • Author(s): 山下幸三、高橋幸弘、大矢浩代、土屋史紀
  • Organizer: 地域ネットワークによる宇宙天気の観測・教育活動に関する研究集会
  • Place of Presentation: ホテルルイガンズ福岡
  • Year and Date: 2015-03-13
• [Presentation] ELF帯・VLF帯電磁界計測に基づいた東南 (2015)
  • Author(s): 山下幸三、高橋幸弘、大矢浩代、土屋史紀
  • Organizer: 電子情報通信学会2015年度総合大会
  • Place of Presentation: 滋賀
  • Year and Date: 2015-03-10
• [Presentation] 静電界計測に基づいた積乱雲観測の検討 (2015)
  • Author(s): 久保埜雄貴、山下幸三
  • Organizer: 電子情報通信学会2015年度総合大会
  • Place of Presentation: 滋賀
  • Year and Date: 2015-03-10
• [Presentation] 東南アジアVLF帯電磁波観測ネットワーク（AVON）による雷・下部電離圏観測とウィンタースクール開催報告 (2015)
  • Author(s): 大矢浩代, 山下幸三, 土屋史紀, 高橋幸弘, 中田裕之
  • Organizer: 地域ネットワークによる宇宙天気の観測・教育活動に関する研究集会
  • Place of Presentation: ホテルルイガンズ福岡
  • Year and Date: 2015-03-02
• [Presentation] ERGプロジェクトにおける連携地上観測ネットワーク (2015)
  • Author(s): 塩川和夫,藤井良一,橋本久美子,細川敬祐,石井守,門倉昭,河野英昭,菊池崇,北村健太郎,三好由純,長妻努,西谷望,尾花由紀,小川泰信,大矢浩代,岡田雅樹,大塚雄一,尾崎光紀,佐藤夏雄,篠原学,田所裕康,田口真,田中良昌,谷森達,土屋史紀,山岸久雄,吉川顕正,行松彰,湯元清文
  • Organizer: 第15回宇宙科学シンポジウム
  • Place of Presentation: 宇宙研，相模原
  • Year and Date: 2015-01-06
• [Presentation] Periods of the lower ionosphere disturbances observed in the phase variations of LF transmitter signals (2014)
  • Author(s): 大矢 浩代,西岡 未知,塩川 和夫,土屋 史紀
  • Organizer: 第136回地球電磁気・地球惑星圏学会講演会
  • Place of Presentation: キッセイ文化ホール，松本
  • Year and Date: 2014-11-03
• [Presentation] 東北大学における地上観測ネットワークのデータベース開発 (2014)
  • Author(s): 八木 学,小原 隆博,鍵谷 将人,米田 瑞生,熊本 篤志,三澤 浩昭,土屋 史紀,岩井 一正,寺田 直樹,大矢 浩代
  • Organizer: 第136回地球電磁気・地球惑星圏学会講演会
  • Place of Presentation: キッセイ文化ホール，松本
  • Year and Date: 2014-11-02
• [Presentation] Response of the D-region ionosphere over South-East Asia during the maximum of Solar Cycle 24 using AVON (Asia VLF Observation Network) data (2014)
  • Author(s): Hiroyo Ohya, Fuminori Tsuchiya, Kozo Yamashita, Yukihiro Takahashi, Kazuo Shiokawa, and Yoshizumi Miyoshi
  • Organizer: Asia Oceania Geosciences Society 11th Annual Meeting
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2014-07-29
• [Presentation] Variations in the D-region ionosphere associated with lightning EMP using AVON and VLF/LF data in Japan (2014)
  • Author(s): OHYA, Hiroyo, TSUCHIYA, Fuminori, YAMASHITA, Koz, TAKAHASHI, Yukihiro, SHIOKAWA, Kazuo, MIYOSHI, Yoshizumi
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-30
  • Invited
• [Presentation] Monitoring of lightning activity in the Maritime Continent based on radio observation in 1-100 Hz band and 0.1-40 kHz band (2014)
  • Author(s): YAMASHITA, Kozo, OHYA, Hiroyo, TAKAHASHI, Yukihiro, TSUCHIYA, Fuminori, SATO, Mitsuteru
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-30
  • Invited
• [Presentation] Geolocation of lightning discharge in the Maritime Continent based on radio observation in 0.1-40 kHz band (2014)
  • Author(s): Kozo Yamashita, Ohya Hiroyo, Yukihiro Takahashi, Fuminori Tsuchiya, Jun Matsumoto
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-30
• [Presentation] 東北大学における電波観測ネットワーク (2014)
  • Author(s): 八木 学, 小原 隆博, 鍵谷 将人, 米田 瑞生, 熊本 篤志, 三澤 浩昭, 土屋 史紀, 岩井 一正, 寺田 直樹, 大矢 浩代
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-29
• [Presentation] AVONデータを用いた東南アジアのD領域電離圏変動 (2014)
  • Author(s): 大矢 浩代，土屋 史紀，山下 幸三，高橋 幸弘，塩川 和夫，三好 由純，中田 裕之，八木 学
  • Organizer: 地域ネットワークによる宇宙天気の観測・教育活動に関する研究集会
  • Place of Presentation: 九州大学（福岡県福岡市）
• [Presentation] ERG計画における連携地上ネットワーク観測 (2014)
  • Author(s): 塩川 和夫，藤井良一、橋本久美子、細川敬祐、門倉昭、河野英昭、菊池崇、北村健太郎、三好由純、長妻努、西谷望、尾花由紀、小川泰信、大矢浩代、岡田雅樹、大塚雄一、尾崎光紀、佐藤夏雄、篠原学、田所裕康、田口真、田中良昌、谷森達、土屋史紀、山岸久雄、吉川顕正、行松彰、湯元清文
  • Organizer: 第14回宇宙科学シンポジウム
  • Place of Presentation: 宇宙科学研究所（神奈川県相模原市）
• [Presentation] Response of the D-region ionosphere to lightning using Asia VLF observation network (AVON) and VLF/LF data in Japan (2013)
  • Author(s): H. Ohya, F. Tsuchiya, K. Yamashita, Y. Takahashi, K. Shiokawa, and Y. Miyoshi
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
• [Presentation] Asia VLF Observation Network (AVON) for Monitoring the D- and Lower E-Region Ionosphere (2013)
  • Author(s): H. Ohya, F. Tsuchiya, K. Yamashita, Y. Takahashi, K. Shiokawa, and Y. Miyoshi
  • Organizer: Asia-Pacific Radio Science Conference (AP-RASC) 2013
  • Place of Presentation: Howard International House (Taipei, Taiwan)
• [Presentation] Response of the D-region ionosphere to EMP using Asia VLF observation network (AVON) and VLF/LF data in Japan (2013)
  • Author(s): H. Ohya, F. Tsuchiya, K. Yamashita, Y. Takahashi, H. Nakata, K. Shiokawa, and Y. Miyoshi
  • Organizer: International Climate And Weather of the Sun-Earth System (CAWSES)-II Symposium 2013
  • Place of Presentation: 名古屋大学（愛知県名古屋市）
• [Presentation] Long Ionospheric Recovery Events Associated with Elves (2013)
  • Author(s): F. Tsuchiya, Y. Takahashi, K. Yamashita, H. Ohya
  • Organizer: Asia Oceania Geosciences Society (AOGS) 2013
  • Place of Presentation: Brisbane Convention & Exhibition Centre (Brisbane, Australia)
• [Presentation] Construction of lightning observation network in Asia and its applications to meteorology and climate studies (2013)
  • Author(s): Takahashi, Y., K. Yamashita, H. Ohya, and F. Tsuchiya
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
• [Presentation] Database of optical and radio wave observation network of the Tohoku University (2013)
  • Author(s): 八木 学，小原 隆博，鍵谷 将人，米田 瑞生，熊本 篤志，三澤 浩昭，土屋 史紀，岩井 一正，寺田 直樹，小野 高幸，大矢 浩代
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
• [Presentation] Geomagnetic, optical, and radio observation network of the Tohoku University (2013)
  • Author(s): 八木 学，小原 隆博，鍵谷 将人，米田 瑞生，熊本 篤志，三澤 浩昭，土屋 史紀，岩井 一正，寺田 直樹，小野 高幸，大矢 浩代
  • Organizer: 地球電磁気・地球惑星圏学会 第１３４回講演会
  • Place of Presentation: 高知大学（高知県高知市）
• [Presentation] Measurement of electromagnetic waves in ELF and VLF bands to monitor lightning activity in the Maritime Continent (2013)
  • Author(s): Yamashita, K., Takahashi, Y., Ohya, H., Tsuchiya, F., Sato, M. and Matsumoto, J.
  • Organizer: European Geosciences Union (EGU) 2013
  • Place of Presentation: Vienna, Austria
• [Presentation] ELF・VLF 帯電磁場計測に基づいた海洋大陸における雷活動の監視 (2013)
  • Author(s): 山下 幸三，大矢 浩代，高橋 幸弘，土屋 史紀，松本 淳
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
• [Presentation] VLF帯電界計測システムの構築と評価 (2013)
  • Author(s): 久保埜雄貴，山下幸三
  • Organizer: 電子情報通信学会ソサイエティ大会
  • Place of Presentation: 福岡工業大学（福岡県福岡市）
• [Remarks] AVONデータベース
  • URL: http://iugonet02.gp.tohoku.ac.jp/avon/cdf/