Very near-bottom tidal straining in a sea strait

Lincoln Sea and Nares Strait

A winter phenomenon of ice break-up takes place in Lincoln Sea every year. A previous study based on ERS-1 SAR data has been resumed based on Radarsat data that is briefly reported here. The study of two winters, 1996-1997 and 1997-1998, is supported by wind data. It is found that the ice motion in the area often is driven by wind but also that it is seriously influenced by blocking at the entr...

Measurements of Turbulence near the Sea Bed in a Tidal Current

The turbulent fluctuations of velocity have been measured, using an electromagnetic flowmeter, at heights up to 1.75 meters above the sea bed. The area of observations was off Anglesey, North Wales, in depths of 12 to 22 meters, on a firm, sandy bottom and during neutrally stable conditions. A number of records of the longitudinal (u) and vertical (w) components of velocity were obtained, and a...

Tidal conversion at a very steep ridge

where ρ0 is the mean density of seawater, U cos(ωt) the tidal velocity, and f the Coriolis frequency. The function M(b/h) increases monotonically with M(0)= 1, M(0.92)= 2 and M(1)=∞. As b/h→ 1, M diverges logarithmically and consequently the radiated power grows as ln[(h − b)/b]. We also calculate the conversion in a realistically stratified ocean with strongly non-uniform buoyancy frequency, N...

Tidal Flow Patterns Near A Coastal Headland

Experimental investigations were carried out in the Manchester Tidal flow Facility (MTF) to study the flow patterns in the region around and adjacent to a hypothetical headland in tidal (oscillatory) ambient flow. The Planar laser-induced fluorescence (PLIF) technique was used for visualization, with fluorescent dye released at specific points around the headland perimeter and in its adjacent r...

Rías and Tidal-sea Estuaries