Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

10 years investigations o f the solar UV radiation and total ozone in Stara Zagora, Bulgaria features during both of them. After the first contact TOC began to decrease till the maximum obscuration, reaching values which turned out to be less by about 75 DU for 11 August 1999 and 82 DU for 29 March 2006 with respectto the corresponding ones before the eclipses. In both cases, two maxima on either side of the totality were also found. The registered behaviour of the total ozone around and after the maximum obscuration is quite similar to the one, obtained by Mims and Mims [7] and Chakrabarty et al. [8]. I contact Max. phase 76% (V contact Local time (UT ♦ 2), h Fig. 7. The behaviour o fUV solar radiation during the solar eclipse on March 29th2006 in Stara Zagora. References 1.Efstathiou M , Varotsos C , Kondratyev K.Ya, Journal of Meteorology and Atmospheric Physics, 68, pp.171-176,1998. 2.Madronich S , McKenzie R .L , Caldwell M .M , Bjom L .O , Ambio, 24, pp. 143-152, 1995. 3. Chandra S , Varotsos C , Flynn L.E, Geophysical Research Letters, 23, pp. 555-558, 1996. 4. Kondratyev K .Ya, Varotsos C .A , Nuovo Cimento C, 18, pp. 123-151, 1995. 5. Steinbreht W , Claude H , Kohler U , Hoinka K .P, Journal of Geophysical Research, 103, pp. 19183- 19192, 1998. Local Time (UT+3 h) Fig. 8. TOC variations during the solar eclipse (A - 29.03.2006; В - 11.08.1999).Moments: a - 1 contact; b - max phase; с - I V contact. 6.Petkov B .H , Gogosheva Ts.N. and Krastev D.G.: Measurements of the total ozone content over Bulgaria by scanning ultraviolet spectrometer, Comptes rendus de l’Academie bulgare des Sciences, 54, N 7, 35-38, 2001. 7. Mims, F.M.and Mims, E .R , Fluctuations in column ozone during the total solar eclipse of July 11, 1991. Geophysical Research Letters, 20, 367-370,1993. 8. Chakrabarty, D.K. et a l. Fluctuation in ozone column over Ahmedabad during the solar eclipse of 24 October 1995. Geophysical Research Letters, 24, 3001, 1997. 181