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9. Global Wind Patterns

 

 

 

 

Expedition Menu

1. Introduction
2. Ocean Temperature
3. Circulation
4. Atmospheric Heat
5. Heat and Pressure
6. Atmospheric Pressure
7. Air Pressure and Wind
8. Wind Directions
9. Global Wind Patterns
10. Measuring Circulation

Motions of air in the atmosphere, in the form of wind, create a stress on the surface of the ocean, which in turn, provides for the transfer of momentum to the water below!

Stress is defined as force per unit area and in measured in units of dynes/centimeter2

  • The red arrows in the diagram below indicate very strong winds, creating stresses greater than 1 dynes/cm2 . (cm = centimeter; 2.54 cm = 1 inch)

  • Also note how the wind directions form circular paths around high pressure systems, as the wind blows away from the high pressure it is deflected due to the Coriolis effect.

Map showing the distribution and direction of wind stress on sea surface

Courtesy of Shinzou Fujio with dataset published by Oregon State University (Han and Lee, 1981).
Last Updated on
October 24, 1998
Send to Don Reed
Department of Geology
San José State University 

 

How are the motions of the surface of the ocean measured?