Air Pressure & Winds

Measuring Air Pressure

• millibars
• inches of mercury
• mercury barometer
• aneroid barometer
• aneroid barograph

Examples of High and Low Pressures recorded on Earth

Pressure & Temp Changes with Altitude

Horizontal Variations in Air Pressure

• influence of temperature on air pressure

Factors Affecting Wind

• pressure gradient force
• Coriolis Effect (graphic, animation)
• friction

Winds Aloft & Geostrophic Flow

Cyclonic & Anticyclonic Flow

Airflow associated with surface/upper atm

Wind Vane & Anemometer

Wind Roses of Westerlies and SE Trades