Indian Journal of Science and Technology
Year: 2010, Volume: 3, Issue: 3, Pages: 332-334
R. Samuel Selvaraj, S. Tamil Selvi,* and S.P. Vimal Priya
* Dhanalakshmi Srinivasan College of Engineering & Technology, Chennai-603 104.
Presidency College, Department of Physics, Chennai-600 005.
[email protected] ; [email protected]
The possible relationship between surface ozone and smoothed sunspot numbers (SSN) has been studied. The sunspot data were collected from Udaipur Solar Observatory for 1996-2004. Surface ozone has been measured at Tranquebar (110 N, 79.9 0 E), a tropical rural coastal site on the east coast of southeast India, during the same period. The measurements have shown that there exists a significant diurnal cycle/oscillation of average ozone with a maximum concentrations in the afternoon and average minimum ozone concentration at sunrise. Ozone measurements have also shown that the average higher concentrations [23 ± 9 ppbv] in May and lower concentration (17±7 ppbv) in October at this site. Further, the increase in surface ozone in association with increase in sunspot numbers is observed during May and October.
Keywords: Smoothed sunspot numbers; surface ozone; significant diurnal cycle.
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