TY - JOUR A1 - Winiecki, S A1 - Frederick, J E T1 - Ultraviolet radiation and clouds: couplings to tropospheric air quality. Y1 - 2005/11/16 N1 - CR830890C003 N1 - CR830890 JF - JOURNAL OF GEOGRAPHICAL RESEARCH VL - 110 IS - D22202 ER -