chp 8 ppt part1

chp 8 ppt part1 - Waves & Water Dynamics Chapter 8...

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Waves & Water Dynamics Chapter 8 Prof. G. Weatherly
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Waves transport energy not mass. Currents, such as the Gulf Stream, discussed in last chapter transport energy and mass.
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Waves are seen at the surface (surface waves). They are also seen interfaces of low and high density water (internal waves). As indicated below internal waves have larger amplitudes and longer wavelengths, than surface waves. They also move much slower than surface waves.
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An example of an internal wave seen in the Sulu Sea (in southwestern Phillipines). A satellite photo. These were probably excited at the shelf break.
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An example of a breaking internal wave off the Oregon coast on the continental shelf. Seen with a sonar fish finder. The orange-red is the internal wave.
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Surface waves are classified by what causes them. Tides (caused by astronomical effects of moon and sun; next chapter), Tsunami (caused by tectonic activity), an wind waves (caused by winds).
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Lot of energy in tides. Indivual
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chp 8 ppt part1 - Waves & Water Dynamics Chapter 8...

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