Winds
Global and local winds
What are Winds?
The meaning of wind is air traveling in a fast pace. Winds are the movement of air from high pressure areas to low pressure areas. People measure wind speed with a anemometer which has four cups that spin on a pole. However fast the cups are going is how fast the wind is blowing.
Local Winds
Local winds are winds that blow over short distances. They are caused from the unequal heating of the earths surface within a small area. Some types of local winds are sea breezes and land breezes.
Sea Breeze
A Sea Breeze happens during the day. The cold air comes in from the sea, and hits the warm air from the land. Then the warm air rises into the sky. This is a Sea Breeze.
Land Breezes
Land Breezes happen during the night. The cold air comes from the land and when the cold air hits the warm air from the sea the warm air rises. That is a Land Breeze.
Global Winds
The Global Winds are all over the world. Some global winds are the Jet Stream, Doldrums, Horse Latitudes, Prevailing Westerlies, and the Polar Easterlies. Global winds are winds that travel over a large area. These winds cover the whole world.
Horse Latitude
Horse Latitudes are in the middle of the trade winds and the Prevailing Westerlies. These winds are calm areas of falling air. These winds are at 30 degrees North and South latitude and are very weak.
Trade Winds
Trade Winds are winds that go to the equator for different trades. They lie in between 0 degrees and 30 degrees latitude. Sailors use this wind to help them move their cargo to other countries so they could be traded.
Jet Stream
The Jet Stream is a band of very strong winds in the upper troposphere. Airplanes use this to travel fast while saving fuel. This goes right though the USA.
Polar Easterlies
Polar Easterlies are winds that blow from the North to South pole. These are in the Arctics and are very cold. They are from 60 degrees to 90 degrees latitude.
Convection Currents
Convection Currents are part of global winds not local winds. These Currents are 10 km above the earths lands. These make the wind renewable and makes them stay in one place at a time.