Internal waves detected with a continental shelf current-meter array

Abstract

A 1-km square current-meter array at 130 m depth on the Sydney continental shelf revealed an internal wave packet at 100 m depth propagating coastward at 0.5 m s-1 with a period of c. 15 min and a wavelength of c. 400 m. Current meters at 35 and 70 m depth on one mooring showed what was possibly an independent packet that was detected 20 min before the deeper one and that showed depressions of the temperature structure (of 20 m) and shear flow between the two meters.