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Thursday, 09th September 2010 

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Oceanography Articles
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  About Tsunamis
Author: Surf Newquay
 Added: 01/09/2005
 Type: Tutorial
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"Tsunami" is the Japanese term meaning wave in the harbor. As such it is most descriptive of the observed phenomenon frequently referred to as tidal wave or seismic sea wave. A tsunami is a system of gravity waves formed in the sea as a result of a large-scale disturbance of sea level over a short duration of time. In the process of sea level returning to equilibrium through a series of oscillations, waves are generated which propagate outward from the source region.
  Waves
Author: Dr J Floor Anthoni
 Added: 03/27/2004
 Type: Tutorial
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When the wind blows across the water, it changes the water's surface, first into ripples and then into waves. Storms can make enormous waves, particularly if the wind, blows in the same direction for any length of time. In this chapter, you can learn what waves are and how they behave.
  Beaufort Scale Of Wind Force And Sea Conditions
Author: Dr J Floor Anthoni
 Added: 03/27/2004
 Type: Tutorial
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One of the first scales to estimate wind speeds and the effects was created by Britain's Admiral Sir Francis Beaufort (1774-1857). He developed the scale in 1805 to help sailors estimate the winds via visual observations. The scale starts with 0 and goes to a force of 12. The Beaufort scale is still used today to estimate wind strengths.
  Dunes And Beaches
Author: Dr J Floor Anthoni
 Added: 03/26/2004
 Type: Tutorial
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People like beaches. People swim in the water or surf on the waves. The beach is pleasant for a stroll. But why are beaches found where they are? Why are they not washed into the sea? How are dunes formed? How do beaches protect? Why are not all beaches the same?
  Currents
Author: Dr J Floor Anthoni
 Added: 03/26/2004
 Type: Tutorial
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Waves and tides cause currents that see-saw to and fro but the large ocean basins have currents that flow mainly in one direction. Such currents cause upwellings of nutrients from the deep, influence the weather and bring about cyclical changes in coastal seas.
  Oceans
Author: Dr J Floor Anthoni
 Added: 03/25/2004
 Type: Tutorial
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The world's oceans cover more than 70% of the Earth's surface. At places they are as deep as the tallest mountains. Read more about their size, surface distribution, origin, evolution, features, crust, tectonic plate movement and more.
  Ocean Properties
Author: Dr J Floor Anthoni
 Added: 03/24/2004
 Type: Tutorial
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The salt water has important properties for life in the seas, properties that influence the circulation of the ocean water.

  Tides
Author: Dr J Floor Anthoni
 Added: 03/23/2004
 Type: Tutorial
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The tides are caused by the rotation of the Earth in the presence of the gravitational pull of moon and sun. Often interpreted as a water 'bulge' travelling around the globe, being balanced by an equal bulge on the other side, recent discoveries have made this simplified concept much more interesting. The pull between moon and earth causes the sea level to go up and down, in most places twice daily but in some places only once. Very few places don't experience tides at all.
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