Meteorology and Aerosol Distribution during AGASP-III: The 'Haze' Flights (March16-30, 1989)

摘要

The third Arctic Gas and Aerosol Sampling Program (AGASP-III) was conducted overthe Norwegian Sea and near Svalbard, in the Scandinavian Arctic, in March 1989. Measurements of wind, pressure, temperature, relative humidity, ozone, and condensation nucleus (CN) concentration were used to identify the air mass type, recent origin, and existence of pollution-derived aerosols, i.e., haze. Significant regions of elevated CN concentrations that could be traced to known northern European source regions were encountered during three of the flights in the lowest 3 km. On the other three flights the CN concentrations were representative of 'clean background' conditions at this latitude. Significant concentrations of CN (CN>10,000 cu cm) found immediately below the tropopause on three flights indicated vigorious gas-to-particle conversion. In two instances significant ozone destruction was detected in the surface layer.