Changes in atmospheric electricity over about eighty years

Hideyuki HIRAHARA; Yasuhiro MINAMOTO

Presentation information

Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS26_29AM1] Atmospheric Electricity

Tue. Apr 29, 2014 9:00 AM - 10:45 AM 422 (4F)

Convener:*Yasuhide Hobara(Graduate School of Information and Engineering Department of Communication Engineering and Informatics, The University of Electro-Communications), Tomoo Ushio(Information and communication engineering department, Osaka University), Chair:Yasuhide Hobara(Graduate School of Information and Engineering Department of Communication Engineering and Informatics, The University of Electro-Communications)

9:15 AM - 9:30 AM

[MIS26-02] Changes in atmospheric electricity over about eighty years

*Hideyuki HIRAHARA¹, Yasuhiro MINAMOTO¹ (1.Kakioka Magnetic Observatory)

Keywords:atmospheric electricity, diurnal variation, fair weather, water dropper, cloud grid information

The Japan Meteorological Agency has observed atmospheric electric field at Kakioka magnetic observatory (KMO) since 1929. This observation has been carried out by a water-dropper instrument without replacing. Meteorological observations at KMO stopped in 1997, and fair-weather days of atmospheric electricity have been extracted from data of atmospheric electricity itself and precipitations. We extracted clear weather days with weather satellite images and all-sky photos at KMO, and derived diurnal variation of the atmospheric electric field in calm days. In this presentation, we will show the diurnal curve at present and past, from 1931 to 1935, and discuss changes in atmospheric electricity over about eighty years.