if the revolving of the earth creates wind how come there are days which appear to be totally windless? And then why are there days with heavy winds?
2007-06-23 00:31:40 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Winds represent the flows of air masses necessary for the earth to transfer excess heat energy especially from the equator to the poles. The air masses can travel as distinct cells that rotate because of Coriolis forces due to the earth's rotation. Just as there is relative calm in the eye of a hurricane, wind conditions prevail relative to the centers of rotation of cells. When hot and cold cells (or fronts) collide, warm air is forced high aloft where it cools and moisture condenses causing snow that melts to rain. Some of the strongest winds occur at storm fronts where a falling wall of rain that entrains air forcing it down to the ground where it spreads out as strong gusty winds.
2007-06-23 01:26:37 · answer #1 · answered by Kes 7 · 1⤊ 0⤋
Besides the revolution of the Earth, wind comes from pressure differences between air masses. The wind blows from high pressure areas to low, just like a balloon when it's deflating. When the sun warms the air, it get's less dense and weighs less per unit volume. Cold air weighs more. Aif containing moisture weighs even more. The whole mess also moves from West to East, because the Earth is rotating underneath it. Sometimes, you'll be under a large mass of area of a constant density without much pushing it .... so it seems calm..
2007-06-24 11:08:17 · answer #2 · answered by squeezie_1999 7 · 1⤊ 0⤋
Winds are caused due to the change in pressure. An area which is hot (low pressure) will transfer some heat to a colder region (high pressure). Therefore the outcome of this transfer is wind.
When you feel that there is no wind, it just simply means that there is no change in pressure in the surrounding areas.
Similarly, when it is VERY gusty, it means that there is a HUGE pressure difference btwn surrounding areas and hence you feel the breeze.
2007-06-23 07:43:43 · answer #3 · answered by whizardgirl2001 2 · 2⤊ 0⤋
The revolving earth is not the direct cause of winds. Winds occur in response to changes in PVT (pressure, volume, temperature) in weather systems. The exchange of heat between high pressure and low pressure weather systems is the cause of winds. The greater the difference in the adjacent pressures, the higher the wind speed.
2007-06-23 08:02:50 · answer #4 · answered by ekil422 4 · 1⤊ 0⤋
It would be faster if you looked that up your self. You must like people to type.
2007-06-23 07:39:49 · answer #5 · answered by manpalda s 2 · 1⤊ 1⤋