Movie 1. Snapshots from the animation with an interval of three months. Note the preferential site for eddy generation off Sitka, AK during spring. Movie 1: The mean annual cycle of the upper layer thickness in the eastern Gulf of Alaska. Animation period: July (beginning) - June (end). No. of frames: 59. Interval: 6 days 2 hours. Size: 833 KB. The color coding of the upper layer thickness (in meters) is shown to the left. Please note that some software for displaying MPEG animations will not display each frame by default. We strongly recommend that you set your MPEG viewer to "Play All Frames" or a similar option.