[M-IS07] Effects of lightning, severe weather and tropical storms

[MIS07-05] Successive observation of atmospheric electric observation at Kakioka Geomagnetic Observatory

*Masashi Kamogawa¹, Tomoyuki Suzuki¹, Toshiyasu Nagao³, Yasuhiro Minamoto² (1.Global Center for Asian and Regional Research, University of Shizuoka, 2.Laboratory for Environmental Research at Mount Fuji, 3.Institute of Oceanic Research and Development, Tokai University)

Keywords:Atmospheric electric field, Potential gradient, Kakioka

The atmospheric electric field (AEF) measurement has been carried out by the Japan Meteorological Agency (JMA) at Kakioka geomagnetic observatory since 1929. The JMA decided that the AEF measurement would terminate at the end of February 2021. Since many researchers have used the AEF data at Kakioka, several research groups such as universities examined whether or not successive observations could be conducted at Kakioka. In our grope, we installed one field mill with board range of intensity developed by Otowa Co. Ltd., sensitive and insensitive field mills developed by Boltek and two all-sky cameras at 18 of Feb., 2021. This observation was available on not only traditional fair-weather study but also the study of severe weather accompanying heavy lightning activities. The sampling of field mills are 20 Hz (Otowa) and 10 Hz (Boltek). The time stamp was synchronized by GPS.

This paper is a preliminary report of the AEF measurement in the vicinity of the current AEF observation operated by our group. This figure shows that the time-series of AEF records (Otowa) from 19 to 23 of Feb. of 2021 in UT.