All About The Wind

By: Matthew Simonetti

General Information on Wind

The definition of wind is perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction.Wind is caused by differences in air pressure within our atmosphere.

Information on Local Winds

Local winds are small scale convective winds of local origin caused by temperature differences. They usually change very often and the weather forecast people talk about this kind on the TV everyday. A sea breeze describes a wind that blows from the ocean inland towards land.and breezes blow by Unequal heating of air over land and water results in breezes near shorelines.

Information on Global Winds

These Global Winds are the dominant prevailing wind patterns that blow in a fairly constant, steady direction across our earth.Global Winds are formed from uneven heating of the atmosphere from the sun .The Doldrums are regions of the Atlantic and Pacific oceans that have little if any wind. The Doldrums are caused by solar radiation from the sun, as sunlight beams down directly on area around the equator. This heating causes the air to warm and rise straight up rather than blow horizontally. The result is little or no wind, sometimes for weeks on end.

What are Trade Winds? Wind flows outward down the pressure gradient away from the subtropical highs. As it does so, it encounters the coriolis effect caused by the rotation of the Earth. This force causes the winds in the Northern Hemisphere to move from the east towards the west below the subtropical high, and from the west towards the east above the subtropical high. The opposite is true in the Southern Hemisphere. Above the subtropical high winds move from east to west, and below the subtropical high winds move from west to the east.

Prevailing Westerlies are the winds in the middle latitudes between 35 and 65 degrees latitude. They tend to blow from the high pressure area in the horse latitudes towards the poles. These prevailing winds blow from the west to the east steering extratropical cyclones in this general manner.

Prevailing Easterlies are the dry, cold prevailing winds that blow from the high-pressure areas of the polar highs at the north and south poles towards low-pressure areas within the Westerlies at high latitudes. Cold air subsides at the pole creating the high pressure, forcing a southerly (northward in the southern hemisphere) outflow of air towards the equator. This outflow is then deflected westward by the Coriolis effect, therefore these prevailing winds blow from the east to the west.

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