%0 Journal Article
%T Ozone and UV-B radiation anticorrelations at fixed solar zenith angles in southern Brazil
%A Ricardo Andr¨¦ Guarnieri
%A Fernando Lu¨ªs Guarnieri
%A Danieli Balbueno Contreira
%A Liana Franco Padilha
%J Geof¨ªsica internacional
%D 2004
%I Universidad Nacional Aut¨®noma de M¨¦xico
%X Anticorrelation behavior between total ozone column and UV-B radiation was observed for clear sky conditions during the year 2000 at the Southern Space Observatory OES/CRSPE/INPE ¨C MCT (29.44¡ãS, 53.82¡ãW) located in the southern part of Brazil. To eliminate geometrical dependence of the solar angular position in relation to the instrument, UV-B radiation was measured at fixed solar zenith angles. The UV-B radiation (280-315 nm) was measured by an Eko Instruments model MS-210W radiometer, and total ozone column data was obtained by a Total Ozone Mapping Spectrometer on board of the NASA Earth Probe satellite. Correlation coefficients varied from R = -0.86 at 70¡ã and 55¡ã, to R = -0.97 at 40¡ã. Ozone variations explained 74 to 94% of the UV-B variability. A 1% reduction in ozone resulted in an increase of about 1% in UV-B for the solar zenith angles studied.
%K Ozone
%K ultraviolet radiation
%K anticorrelations
%K fixed solar zenith angles
%K cloud coverage
%K clear sky
%U http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2004/01/guarnieri.pdf