Abstract
The Air Resources Laboratories' trajectory model was used to calculate five-day back trajectories from Barrow, Alaska for the period from February 1975 to January 1980. Using a 300–2000 m averaging layer, trajectories were produced four times a day over the five-year period. A simple typing scheme was designed to indicate both direction and distance of air transport. Analysis of the five-year period showed that most transport from distances beyond 2000 km takes place from November to March, with an anomalous peak in August. The direction of this transport is predominantly from the south, with a peak of over-the-pole flow during the month of March. Trajectory direction and speed vary significantly from year to year and season to season.
Published Version
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