Meteorological characteristics of large acidic deposition events at Kejimkujik, Nova Scotia

Major wet deposition events at Kejimkujik National Park, N.S., between May 1979 and December 1983 were characterized in terms of the deposition of sulphate, nitrate and hydrogen ions. The prevailing synoptic meteorological regime was also examined to develop a simple predictive capacity with respect to large acidic deposition events. Approximately 8 per cent of the annual precipitation events at Kejimkujik were responsible for 30 per cent of the total annual amount of acidifying pollutants deposited. Such episodes took place about 5 times per year, between March and November. The sequence of events usually preceding precipitation episodes of this kind was characterized.