Atmospheric trajectories were calculated for various Arctic locations for March and April 1983, during the Arctic Gas and Aerosol Sampling Program (AGASP). Ten-day back trajectories arriving twice daily were calculated on the 850-, 700-, and 500-mb isobaric surfaces. During AGASP flights 1-4, trajectories arriving at Barrow show that flow was over the pole from western Asia and Europe, and that the strongest winds and least vertical wind shear on March 14 at 0000 UT. Surface aerosols and optical depth measured at this time at Barrow reflect a significant haze episode. Trajectories arriving along the flight tracks north of Barrow were frequently very different from those arriving at Barrow, indicating that source areas were in northeast Asia. Trajectories arriving along AGASP flight track 8 near Svalbard showed that the source area changed dramatically in the approximate location of an Arctic aerosol/haze front.