Abstract
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 (11°N, 79.9 °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.
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