ThinkRankAtmospheric Circulation and Weather Systems
Overview
Weather is driven by the movement of air prompted by pressure differences. This chapter details the global wind patterns, the cells of general circulation, and the destructive power of cyclonic systems.
Learning Objectives
- Explain the primary forces governing wind movements
- Map the tricellular model of atmospheric circulation
- Contrast Tropical and Extra-tropical cyclones
- Analyze the impact of Jet Streams on weather
Key Concepts
General Circulation
The combination of the Hadley, Ferrel, and Polar cells that transport heat from the equator toward the poles.
The Coriolis Effect
An apparent force caused by Earth's rotation that deflects winds to the right in the Northern Hemisphere and left in the Southern.
Key Terms
ITCZAnticycloneJet StreamTrade WindsGeostrophic Wind
Examples
The Hadley Cell
Warm air rises at the equator and sinks at 30° latitude, creating the trade winds.
Quick Check
- What is the ITCZ?
- How are Tropical cyclones fueled?