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AOS 3 Lecture Screens (580 words) |
 | Due to the variation of pressure in the vertical, there is a vertical pressure gradient force acting upward (since pressure is relatively high near the ground and relatively low aloft, and pressure gradient forces point from high to low pressures). |
| In the horizontal, we consider all the forces that affect the wind: the (horizontal) pressure gradient force and the Coriolis force. |
| When this happens, the Coriolis force turns with it, to stay at a right angle to the wind direction; the pressure gradient force continues to point with the same maginitude and direction, right angle to the isobars and from higher to lower pressure. |
| OUP Canada: Unit 09 (1194 words) |
| The pressure gradient force is a precursor to wind (i.e. |
| The Coriolis force is an apparent force caused by the rotation of the Earth; it deflects moving objects to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. |
| The difference in surface pressure over a given distance between two locations is called the pressure gradient; when that pressure gradient exists, it acts as a force that causes air to move (as wind) from the place of higher pressure to that of lower pressure. |
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