This was the clearest day of the experiment. A large surface high was east of the camp. Winds were southeasterly. Both radar and lidar reported clear skies over the ice camp.
The ER-2 flew over Barrow making coastal crossings. It encountered clouds at several levels. Cloud motions were from the southeast. The C-130 flew to SHEBA ship.
The trajectories to SHEBA ship show that most air came only a short distance in the Arctic Ocean rotating around the large high pressure system. Only the 9 km trajectory shows air coming from Siberia to the ship.
The trajectories to Barrow show the surface air coming from northern most Canada across the Beaufort Sea to Barrow. This air appears to have originated farther north near the pole. The 1.0 and 1.5 km trajectories come from the southeast near Inuvik Canada. The 3.0 km trajectory shows air coming from farther south in Canada and the 6 and 9 km trajectories show north Pacific air looping along the Canadian and Alaskan southwest coasts on the Pacific before crossing Alaska to Barrow.
