1. Wind

2. Wind is defined as the movement of air caused by differences in air pressure
Warm air rises at the equator and cool air sinks at the poles
Rising air creates a low pressure area. Sinking air created a high pressure area.
This movement of air causes large circular patterns of wind called convection cells

3. Global Winds
Movement of air within the convection cells creates defined areas of global winds
Polar Easterlies: From the poles to 60 degree latitude.
Trade Winds: 30 latitude to the equator. Named by sailors traveling the oceans
Doldrums: Area around the equator. Very little wind here because the warm air is rising

4. Jet Stream
A narrow belt of strong winds that blow in the upper Troposphere
Can reach speeds of 400 km / h
Can affect the movement of weather / fronts / storms around the world

5. Local Winds Move short distances and can blow from any direction
Geographic features such as shorelines or mountains that produce temperature differences can create local winds

6. Local Winds
Sea and land breezes – During day, land heats up faster so the air above land rises. Air over ocean flows in to replace it. Process reverses at night
Mountain and Valley Breezes – During day warm air rises up along mountain slopes creating valley breezes. At night cool air sinks down the mountain slopes producing a mountain breeze.