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Diurnal variation of ionization rate close to ground

Dhanorkar, SS and Kamra, AK (1994) Diurnal variation of ionization rate close to ground. Journal of Geophysical Research, 99. pp. 18523-18526.

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Ionization rates for different times on two fair-weather days are computed using Hoppel's (1985) theoretically deduced aerosol-size-dependent attachment coefficients and the aerosol-size spectra derived from our measurements of mobility spectra of atmospheric ions made at a height of 1 m above ground at Pune (18°32′N, 73°51′E, 559 m above mean sea level), India. The ionization rates are minimum in the afternoon and increase to their maximum values of 116.52 and 103.93 ion pairs cm−3 s−1 in the early morning. Increase in ionization rate is found to accompany with the increase in the total aerosol concentration. Our results suggest that this increase in ionization rate may be due to addition of some radioactive aerosol particles, primarily in the size range of 0.002 to 0.004 μm

Item Type: Article
Additional Information: Copyright of this article belongs to American Geophysical Union
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 14 May 2016 04:46
Last Modified: 14 May 2016 04:46

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