Tuesday, July 12, 2011

Isobars: Air pressure



Isobars are contour lines on a map that shows equal or constant pressure relating to that line. They are lines drawn on a map joining places of equal atmospheric pressure. They can be used to predict future weather patterns and are widely used to do so. The map above uses isobar contour lines of different color (red and blue) to show both high and low pressure, respectively. 

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