TOPOGRAPHICALLY GENERATED GRAVITY-WAVES IN THE BROOKS-RANGE, ALASKA

Amplified wind events are identified over the Brooks Range in Alaska, with observed wind speed increasing from calm to 5 ms(-1) over 24 to 3 6 hours. In simulations using an limited area climate system model, th e wind events are captured consistently, although generally display gr eater strength than observed. Cooling associated with the wind events lead to an identification of the NE region of the North Slope of Alask a, below the inversion, as the source region for the air flow. Analysi s of the wind event of 7th January 1992 supports the nonlinear hydraul ic model of gravity waves.