BIOL 4673 Lecture Notes - Lecture 3: Westerlies, Oceanic Basin, Coriolis Frequency
3 Mar 2018
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Document Summary
Lecture 3: forces on the global ocean 2: wind. How to read a weather map: wind roughly follow lines of constant pressure. In the northern hemisphere the circulation is anti- clockwise around cyclones (low pressure): wind speed is determined by the spacing of the pressure contours. In a low pressure system, the ekman boundary layers at the surface leading to a convergence of winds, and hence the air in the centres must rise to conserve volume. In the southern hemisphere the circulation is clockwise around cyclones (low pressure). Coriolis force: coriolis forces acts at right angles to the velocity of a moving object in a rotating frame of reference. In the northern hemisphere this apparent force is the right of the objects motion. A ctd in use: knowledge of maps, relies on someone compiling data from ocean. Measure currents: can measure currents directly, using following instruments.
