Ground conductivity measurements with high temporal resolution

  • 旻潔 何

Student thesis: Master's Thesis

Abstract

The atmospheric conductivity varies with time, height, humidity and composed of the environment. In addition, an ionosphere-atmosphere-lithosphere coupling model proposed by Kuo et al. [2011, 2014] pointed out that the precursors of earthquake may also result a change of the conductivity at ground. The goal of this work is to design a Gerdien condenser with a high temporal resolution to observe the conductivity variation and its associations. Furthermore, the long-term in-situ conductivity monitoring can understand the circulation of the electric charges above the Earth's surface and the global electric circuit.
In this work, the circuit of the Gerdien condenser was redesigned, and the mechanical structure was enhanced to reduce the leakage current effectively and to solve the problem of the static charges adherence to the outer electrode. After the verification, this instrument can measure the variation of the conductivity at different ion concentrations effectively. Two experiments were carried out, and the variation of the conductivity associated with the PM2.5 and PM10 was observed, furthermore, the diurnal variation of the conductivity is also noted.
Date of Award2018
Original languageEnglish
SupervisorBing-Chih Chen (Supervisor)

Keywords

  • Atmospheric Electric Conductivity
  • Gerdien Condenser
  • High Temporal Resolution

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