Japan Geoscience Union Meeting 2018

Presentation information

[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS04] Thunderstorms and lightning as natural hazards in a changing climate

Sun. May 20, 2018 1:45 PM - 3:15 PM A01 (Tokyo Bay Makuhari Hall)

convener:Mitsuteru Sato(Department of Cosmoscience, Hokkaido University), Hisayuki Kubota(Hokkaido University), Kozo Yamashita(足利工業大学工学部, 共同), Yukihiro Takahashi(Department of Cosmosciences, Graduate School of Science, Hokkaido University), Chairperson:Takahashi Yukihiro(Hokkaido University), Sato Mitsuteru(Faculty of Science, Hokkaido University), Yamashita Kozo(Department of Technology, Ashikaga Institute of Technology)

2:00 PM - 2:15 PM

[MIS04-08] Monitoring for lightning activities and thunder cloud developments over the Tokyo metropolitan area based on electrostatic field and electromagnetic measurements

*Jun-Ichi Hamada1, Jun Matsumoto2, Kozo Yamashita3, Yukihiro Takahashi4 (1.Faculty of Urban Environmental Sciences, Tokyo Metropolitan University, 2.Department of Geography, Tokyo Metropolitan University, 3.Department of Technology, Ashikaga Institute of Technology, 4.Department of Cosmosciences, Graduate School of Science, Hokkaido University)

Keywords:Lightning, Heavy rainfall

To monitor lightning activities and development of thunder cloud, electromagnetic and electrostatic field measurements were conducted over the Tokyo metropolitan area during the summer season in 2016 and 2017.

In 2016, we observed atmospheric electrostatic field with an electric field monitor (BOLTEK ELF-100) at Hino campus of Tokyo Metropolitan University during August-September. Lightning activities were measured with ELV-VLF band radio observation system at 4 sites in the metropolitan area. The worldwide lightning location network (WWLLN) data was also used to indicate temporal and spatial variations of lightning over the area and the climatological characteristics

Obtained results show clear intra-seasonal variations of lightning activities in 2016. One of the most frequent lightning events were observed in August 18 with the passage of a frontal system over the Kanto area. The electrostatic field measurement at Hino shows clear relationship between electric field variations and thundercloud developments. We will introduce observational results more detail in the presentation.

This work was partly supported by Japan Science and Technology Agency (JST) and Japan International Cooperation Agency (JICA) under SATREPS