Abstract
The purpose of this paper is to study the nature of variation of O3 concentration of Antarctic Survey Stations and its correlation with solar ultraviolet radiation. Solar UV data for the period November 1978 to October 1984 are taken from Solar Geophysical Data Book. In absence of solar UV data for long period, a calibration curve between solar UV radiation and solar flare number (S.F.NO.) is drawn. (A straight line is obtained and correlation coefficient between two variables is 80%). The equation of straight line from least square principle becomes, UV flux = 0.2672 + 2.7578 × 10−5 × S.F.NO. From this equation UV flux values for long period are calculated from known values of solar flare numbers. O3 concentration of two Antarctic Survey Stations, Halley Bay (76‡ S, 27‡ W) and McMurdo (78‡ S, 166‡ E) are considered for analysis and following important results are obtained: (i) Yearly variations of O3 concentrations and UV radiations are mainly controlled by their October concentrations. (ii) Correlation coefficient between O3 concentration and UV radiation is 62% for the month of October. For the other months it is poor. (iii) It is concluded that dramatic decrease of O3 concentration at Antarctica is independent of solar UV radiation and chemical processes are responsible for special depletion of O3.
Published Version
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