TRACE GAS AND AEROSOL MEASUREMENTS USING AIRCRAFT DATA FROM THE NORTH-ATLANTIC REGIONAL EXPERIMENT (NARE 1993)

Measurements of the concentrations of O-3, CO, NO, NOy, condensation n uclei, and aerosols in 12 size bins ranging from 0.1 to 3.1 mu m as we ll as a variety of meteorological parameters were collected aboard the NCAR King Air in August 1993 during 16 flights over or near the Gulf of Maine. The purpose of this measurement campaign was to describe the sources and variation of ozone and its precursors in the western NARE region during the summer season. Correlations between O-3 and CO, O-3 and NOy, and other chemical and aerosol measurements are examined. Se veral features in the altitude profiles are investigated using princip al component analysis, The results of the trace gas analyses indicate that anthropogenically influenced ozone production dominated ozone thr oughout the experimental region at altitudes below 1500 m. Other facto rs identified include a distinct signature from fresh emissions below 1500 m. Above 1500 m the sources of ozone were determined by transport from a variety of sources.