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Wind-induced upwelling, coastal currents and sea-level changes

1974; Elsevier BV; Volume: 21; Issue: 5 Linguagem: Inglês

10.1016/0011-7471(74)90038-2

1878-2493

A. E. Gill, Allan J. Clarke,

Ocean Waves and Remote Sensing

The problem of coastal and equatorial upwelling induced by changing wind patterns is considered. In each case, the solution of the linearized problem can be expressed as a sum of modes, the amplitude of each satisfying a first order wave equation. Such equations can be integrated by simple procedures and may be of use for forecasting upwelling. The response at a particular point depends on the wind stress at earlier times at other positions along the coast. Procedures which might be employed for predictions are discussed. When topography and stratification are both present, a model shows that movements of the thermocline are correlated with changes of sea-level at the coast. This suggests that information about upwelling and coastal currents can be obtained from tide gauges.