Dynamic Oceanography - Tides


Tides are in fact a very large wave within which the earth rotates. This lecture include the static and dynamic models of tide formation.

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Table of Contents

Title slide

Tides and the Forces That Generate Them

Tides have a wave form

Sun and Moon act together to influence tides

Diurnal and semidiurnal tides

Examples of tides

Tides result from gravitational attraction and centrifugal effect.

Gravitational and centrifugal force

Explanation of diurnal versus semidiurnal tides

The Equilibrium Theory of Tides

Origin of the tides: equilibrium model

Variations in tidal range

Spring and neap tides

The Dynamic Theory of Tides 1

The Dynamic Theory of Tides 2


The Dynamic Theory of Tides 3

Movement of tides across ocean basins is deflected by Coriolis

Amphidrome formation

Amphidromic systems

Rotary tidal waves

Composite tidal waves

In long and narrow basins tides can not rotate.

Narrow basins: examples


Estuarine tides

Reversing falls

Tidal currents.

Rose diagrams and progressive tidal currents

Global distribution of amphidromic systems

Global distribution of tide types


Author: Sean Todd

Email: stodd@coa.edu

Home Page: http://www.coa.edu/faculty/webpages/stodd/index.

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