Sunday, April 11, 2010

Isobars



Isobars are lines on a map connecting points having equal barometric pressure at a reference altitude at a certain time or period of time. It is used to show different pressures on a map. High pressure cells are shown as H's and Low pressure cells as L's. This map of Europe and the Mediterranean is an isobar because it shows the high pressure zones greater that 1015 hectopascals.

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