The mystery of WIND

By :Nathan Allaire

Definition of Wind

Wind is the movement of air caused by differences in air pressure. Differences in air pressure are caused by the uneven heating of the earth.

Local Winds

Local winds are winds that can move short distances and blow in any direction. They are caused by geographic features that produce temperature differences.


Sea breezes are created by high pressure over the ocean during the day and low pressure over land due to the uneven heating of the earth. Air moves from the ocean to the land creating a sea breeze.


Land breezes are created by low pressure over the ocean during the night and high pressure over the land due to the uneven heating of the earth. This causes wind to move from the land to the ocean creating a land breeze.

Local Winds Diagram

Big image

Global Winds

The combination of pressure belts and the Coriolis Effect cause global winds. Pressure belts form when warm air rises at the equator and moves toward the poles, where it cools. As it cools, some of the air sinks around 30 degrees north and south of the equator. At the poles cold air sinks and moves toward the equator. Around 60 degrees north and south, the air begins to heat up and rise.


Doldrums are areas along the equator where no winds blow because the warm rising air creates an area of low pressure.

Doldrums Diagram

Big image

Trade Winds, Polar Easterlies, and Jet Streams

Trade winds are winds that blow from 30 degrees almost to the equator. They are called the trade winds because of their use by early sailors.


Polar Easterlies are wind belts that extend from the poles to 60 degrees latitude. They are formed from cold sinking air moving from the poles creating cold temperatures.


Jet streams are narrow belts of high speed winds that blow in the upper troposphere and lower stratosphere. They separate warm air from cold air.

Wind web site

This web site will give you more info about the Global winds and the local winds.