| Tidal Forces |
Tides -- we immediately think of the periodic rise and fall in sea level, observed along coastlines around the world. Tides also mean a repeated cycle of ebb and flood as the currents change their direction and speed.
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Why do we have tides?
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Why are the amplitudes and phases of tides different, depending on location?
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How does the tide propagate around the world, or across a basin?
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What influence does the tide have on a larger scale?
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Historic tidal gauge near Anchorage, indicating the extreme tidal range possible along fiords in Southeast and South-central Alaska. (NOAA/NOS Tides and Currents) |
