Japan Geoscience Union Meeting 2019

Presentation information

[E] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS05] New technologies to monitor thunderstorm and severe weather activities

Tue. May 28, 2019 1:45 PM - 3:15 PM 101 (1F)

convener:Mitsuteru Sato(Department of Cosmoscience, Hokkaido University), Yukihiro Takahashi(Department of Cosmosciences, Graduate School of Science, Hokkaido University), Hisayuki Kubota(Hokkaido University), Kozo Yamashita(Ashikaga University, Department of Engineering.), Chairperson:Mitsuteru Sato(Faculty of Science, Hokkaido University), Kozo Yamashita(Department of Technology, Ashikaga Institute of Technology)

3:00 PM - 3:15 PM

[MIS05-06] Data Acquisition System for an Infrasound Network for Thunderstorm Monitoring

*Doreena Karmina Abril Pulutan1, Yukihiro Takahashi1, Mitsuteru Sato1, Hisayuki Kubota1, Kozo Yamashita2, Masa-yuki Yamamoto3 (1.Department of Cosmosciences, Hokkaido University, 2.Department of Engineering, Ashikaga University, 3.Department of Systems Engineering, Kochi University of Technology)

Keywords:data acquisition, thunderstorm, lightning, energy

Inside a thunderstorm, an updraft pushes ice crystals with positive charge to the top, while a downdraft pushes hailstones with negative charge to the bottom. This charge separation results in lightning. While the electric charge and peak current in lightning events have been extensively studied, they do not indicate the strength of the atmospheric convection that produces thunderstorms. Another parameter, the electrical energy from lightning, has not been thoroughly explored. We will look at the electrical energy from lightning as a possible indicator of the strength of a developing thunderstorm. Electrical energy, however, has not been clearly linked to the peak current of a lightning event. Thus, we cannot rely on peak current measurements to estimate electrical energy. Infrasound emitted by thunderstorms might be a possible way to estimate the electrical energy in lightning events. Microphones can be used to detect infrasound. This work will discuss the development of a data acquisition system that will be used to record and transmit sampled infrasonic data from microphones. This work is being undertaken under the SATREPS/ULAT Project.