Chapter 3a – Air Pressure and Winds

These flashcards cover fundamental concepts of atmospheric pressure and winds, including definitions and key events related to air circulation.

Atmospheric Pressure

The force exerted against a surface by the atmosphere, caused by the weight of air.

Barometer

An instrument used to measure atmospheric pressure.

Typhoon Tip

The strongest hurricane on record, reaching a minimum pressure of 870 millibars.

Pressure Gradient Force

The force that causes air to move from areas of high pressure to areas of low pressure.

Centripetal Force

A center-seeking force that directs wind in a curved path.

Coriolis Effect

The deflection of moving air caused by the rotation of the Earth.

Hadley Cells

Large scale patterns of atmospheric circulation that lead to trade winds and affect climate.

Global Winds

Winds that are affected by the uneven distribution of solar energy across the Earth's surface.

Variations in Pressure

Changes in air pressure that can occur both vertically and horizontally.

Siberian Winter of 1968

Event noted for the highest recorded atmospheric pressure of 1084 millibars.