Chris Nunez

The Definition of Wind/What causes winds

Wind is the sideways movement of air. The air always moves from places with high air pressure and places with low air pressure.The name of wind tells you were it started from. For example a east wind starts from the east.

Winds are caused by differences in air pressure. Most of of the time differences in air pressure are caused by the unequal heating of the atmosphere. Warm air weighs less than cold air. Warm air rises. Then cool air moves in and moves out the rising warm air. This air moving makes the wind blow.

Local winds

Local winds are winds that blow short distances.They are are caused by the unequal heating of Earths surface in a small area. Sea breezes are when a Warm air rises off the land and cold air from the sea blow into the warm air forcing the warm air to move and that makes the wind of a sea breeze. A land breeze is when warm air is over the sea and cold air off of the land goes under the warm air and forces the warm air to move and that causes the winds of a land breeze and this happens at night.

Global Winds

Global winds are created by the unequal heating of the earths surface, just like local winds. But not like local winds, global winds happen over a large area.Horse latitudes are located at 30 degrees and they are called horse latitudes because hundreds of years ago sailors couldn't move, they thought that their horses were to heavy.It was actually that these winds are very calm and they weren't strong enough. So the sailors through there horses overboard and this area was known as the Horse latitudes.

Jet Streams

Several miles above the earths surface are bands of high sped winds called Jet Streams. They blow from west to east at about 200 to 400 kph.

Trade winds

Winds blow towards the equator and away from it. The winds towards the equator turn west.

Prevailing westerlies

Between 30 and 60 degrees are winds that blow from west to east because they blow from west to east they are called the prevailing westerlies. The prevailing westerlies are important in the weather of the U.S.
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