By Tyler Hatfield

What are 'winds'?

The definition of 'wind' is that the movement of air from areas of high pressure, to areas of low pressure.

What causes wind?

Wind is caused by the differences in pressure in the atmosphere. When a difference in atmospheric pressure exists, air moves from a higher to a lower pressured area.

Local Winds

Global Winds

What are 'Global Winds'?

Global Winds are a type of wind that spreads over a large area. They are crated by the unequal heating of the Earth's surface. Different parts of the world gets different forms of air pressure. The higher the temperature, the lower the air pressure. If the Sun's Rays hit the equator, giving it a high temperature, it has low air pressure. If it hits the poles, it's a higher air pressure.

High Air Pressure and Low Air Pressure

Uneven heating of the Earth at the equator and the north and south poles creates these giant convection currents. On the equator, warm air rises up and cold air sinks down. As I said before, cold air has a high air pressure and warm air has a low air pressure. This causes winds to blow from an area of higher pressure (The Poles) to an area of lower pressure (The Equator). The warm air at the Equator is pushed towards the poles where it is cooler. The cold polar air has more air pressure creating winds that move the air back towards the equator.
Diagram of the Global Winds

There are multiple types of Global Winds. - Polar Easterlies (2) - Prevailing Westerlies (2) - Trade Winds (2) - Horse Latitudes (2) - Doldrums (1)