Atmospheric Circulation and Weather Systems
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.
Terminology
Historical Insight
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?
How to use this lesson
Read the overview first, then explain the main idea in your own words before checking the key concepts. Use the quick-check questions without looking at the answer. For examination preparation, verify dates, definitions, and syllabus requirements against your official textbook and school or examination-board guidance.
Test Your Knowledge
Ready to check your understanding of this chapter? Take our interactive practice quiz.