EESA09H3 Lecture Notes - Lecture 2: Polar Front, Canadian Pacific Air Lines, Subtropical Ridge
24 Oct 2012
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Document Summary
Movement of air in an ordered fashion. Difference in pressure forms a pressure gradient. Air flows from high pressure to low pressure called pressure gradient force. Fictitious force due to rotation of the earth. In northern hemisphere, causes a deflection to the right of the motion, to the left in the. Formulated mathematically by gaspard gustave de coriolis in 1835; described by. Is related to the distance from the equator. Acts at right angle to the wind affecting the direction. Pgf is always directed from higher pressure towards the lower pressure. Steep pg (closely spaced isobars) indicate strong pgf and high winds. When the wind starts to blow, the coriolis force causes it to bend to the right of its intended path in the northern hemisphere and to the left of its intended path in the. Typical 1km or so above the earth"s surface. Below 1km, the wind is influenced by friction.
