Surface measurements of atmospheric electrical conductivity at Jnanabharathi Campus, Bengaluru (12.96° N, 77.56° E)

Charan Kumar K, Charan

Abstract

Simultaneous measurements of the atmospheric electrical conductivity (σ) and meteorological parameters were carried out at Jnanabharathi campus, Bangalore University (an urban station), Bengaluru, (12.96° N, 77.56° E) for the first time.  Gerdien condenser setup for σ and mini boundary layer mast (micro meteorological tower) for weather parameters was used in this study.  The observations show that the change in daily and weekly variations of σ is strong dependent of activity of Radon (222Rn) gas and meteorological parameters (which defines the stability of the lower troposphere), respectively.  We observed significant influences of atmospheric convective instability on the σ and a negative correlation of -0.56 was found between σ and accumulated rain fall for 2014.  The average σ for the study period was found to be 4.02 ± 0.02 x 10-14 S/m with higher values during winter compared to summer and monsoon.   In future it is planned to use the air conductivity measurements for atmospheric stability, pollution and climate change studies.


Keyword(s)

atmospheric electrical conductivity; ionisation; small ions; radon

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