Taught by Mohammed Al Nami Lesson 2.1 & 2.2 Taught by Mohammed Al Nami Khaled Al Ghannam Faisal Al Saleh Mohammed Al Mohammed

What is wind? Air that moves horizontally Moves from an area of high pressure to low pressure Is parallel to the ground

How is wind generated?

The Coriolis Effect The effect of the Earth’s rotation. For example, ground near the poles doesn't spin as fast as ground near the equator. This affects wind too

Wind Patterns/Wind Belts Caused by the Coriolis effect Hot air rises to the atmosphere Gets to the poles Cools down and sinks as wind Wind rushes to the equator in a straight line, but is bent by the Coriolis effect

Calm Regions Most “calm” regions don’t have many strong winds The Doldrums are a low pressure zone near the equator. It’s air rises up to the poles. During hot months, there is a lot of rain.

Horse Latitude High pressure zones around 30◦N and 30◦N Warm air cools down and sinks here Weather is clear and dry

The Trade Winds East to west From Horse Latitude Die out near the equator

The Westerlies From west From Horse Latitude to poles They bring storms

The Easterlies Blow from east, from polar regions to the mid-altitudes. Storms caused when Easterlies meet Westerlies.

Air Pressure Decreases the higher you get Would not be able to breathe without it

Vocabulary Coriolis Effect: The effect of Earth’s rotation. Air Pressure: The weight of the atmosphere on the Earth’s surface. Barometer: An instrument to measure air pressure.

Summary Wind is generated by hot air rising up The Coriolis Effect: The effect of the Earth’s rotation The Westerlies and Easterlies Horse latitudes are high pressure Calm regions are low pressure

Thank you all for listening! Mohammed Al Nami Faisal Al Saleh Khaled Al Ghannam Mohamed Al Mohammed