Global Winds & Jet Stream

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Presentation transcript:

Global Winds & Jet Stream

Global Winds All winds result from uneven heating of the atmosphere. At the equator the atmosphere is warmer; at the poles it is cooler. You would expect air to simply rise over the equator and sink at the poles. But does it?! (click to open video!)

Global Winds & Coriolis Effect No, because of the Coriolis Effect Coriolis Effect: The apparent curving of the path of a moving object from an otherwise straight path due to the Earth’s rotation A force that deflects moving objects to one side because the Earth is spinning. The object is still going straight but the Earth moves underneath it, making it look like it is curving. In the Northern Hemisphere, the Coriolis Force deflects objects to the right.

Global Wind Belts Use this to label your global winds map. Label the name of the wind belt AND draw arrows to show which way the winds blow.

Coriolis Effect & Storms Coriolis Effect is also what makes hurricanes/cyclones rotate More on this in severe weather!

Jet Stream A narrow belt of strong winds that blow in the upper troposphere/lower stratosphere A fast, strong flowing, river of air Usually flow from west to east Can rise, dip or split Effects storm movement Meteorologist and pilots study this. Why? Jet Stream (click for video)

Wind song http://www.youtube.com/watch?v=g4O9z_R5ZSc