Eight water-soluble organic anions were measured in 70 aerosol samples and 10 snow samples at Barrow, Alaska in March-April, 1989. The ranking of the ions in aerosols according to total (coarse+fine aerosol) median concentrations was acetate (44 ng m-3), oxalate (27), benzoate (23), formate (22), propionate (6), methanesulfonate (5), lactate (4), and pyruvate (4). When added up, the median organic anion mass was 156 ng m-3. The organic anion/nssSO4= mass ratio had a median of 0.18 and 0.07 in the coarse (>1 &mgr;m) and fine (0.5, substantially higher than in aerosols. ¿ American Geophysical Union 1993