Small Variational Signals of Atmospheric Electric Field under Fair Weather

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  • 晴天時大気電界微小変動の観測
  • セイテンジ タイキ デンカイ ビショウ ヘンドウ ノ カンソク

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Abstract

The variational signals of atmospheric electric field under fair weather has been observed both at Aobayama in Sendai and Tsukidate. This signals are measured using slow antenna type electric field meter which is composed of a metal plate electrode and a CR integrator and recorded using a portable pen-recorder. The field meter of this type is suitable to measure relatively rapid variational field signals. We have observed the characteristic variational signals with a few minutes period in a breeze under fair weather. About these signals we examined the comparison of naked metal electrode and insulated one, the dependences of electrode's area and of electrode's height. From signals observed at two different positions the time delay of two waveforms are recognized. This means that scale of electric field perturbation is estimated about several hundred meters. The already found atmospheric circulation with a few minutes suggests that the observed variational electric field signals are caused by the movement of electric charge together with atmospheric circulation.

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