Vertical profile of radon and its progeny concentrations and its effect on atmospheric electrical conductivity near the surface of the earth

Pruthvi Rani, K. S. and Chandrashekara, M. S. and Paramesh, L. (2014) Vertical profile of radon and its progeny concentrations and its effect on atmospheric electrical conductivity near the surface of the earth. International Journal of Advanced Scientific and Technical Research, 4 (4). pp. 119-129. ISSN 2249-9954

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Abstract

Electrical conductivity of the atmosphere is due to the presence of ions in the atmosphere and depends on the meteorological parameters. The variation of electrical conductivity near the earth’s surface is mainly due to the variations of 222Rn and its short-lived daughter nuclei. The diurnal and vertical variations of atmospheric electrical conductivity, radon and its progeny concentrations were studied at Mysore city, Karnataka State, India. Radon concentration varies from 3.70 Bq m-3 to 19.40 Bq m-3 with a geometric mean of 10.80 Bq. m-3. Ion-pair production rate varies between 1.48 to 5.11 ion –pairs cm–3 s–1 over a day. The positive and negative conductivity value varies from 2.44 to 5.31×10–14 –1m–1 with a geometric mean of 3.31 ×10–14 –1m–1 and 2.41 to 5.06×10–14 –1m-1 with a geometric mean of 3.31 ×10–14 –1m–1 respectively. The stable atmosphere during night helps more accumulation of radon near the ground surface and hence the atmospheric electrical conductivity was maximum during early morning hours. A good correlation between electrical conductivity and ion production rate due to radon and its progeny concentrations is observed with a correlation coefficient of 0.87. Vertical variation of atmospheric electrical conductivity is similar to that of radon and its progeny concentrations. Atmospheric electrical conductivity shows positive correlation with wind speed and atmospheric pressure with correlation coefficients 0.72 and 0.47 respectively.

Item Type: Article
Subjects: Physical Sciences > Physics
Divisions: PG Campuses > Manasagangotri, Mysore > Physics
Depositing User: Praveen Kumari B.L
Date Deposited: 29 Apr 2015 07:25
Last Modified: 29 Apr 2015 07:25
URI: http://eprints.uni-mysore.ac.in/id/eprint/17769

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