Ch 20: Air Distribution & Movement

About This Chapter

Watching these lessons can aid in your review of wind patterns, cyclonic activity, air masses and weather fronts. Our videos and quizzes offer information on atmospheric circulation and its impact.

Air Distribution & Movement - Chapter Summary

The lessons in this chapter look at atmospheric circulation and its influence on climate and weather. You'll learn about the atmosphere's general circulation and how we observe it. Our instructors explain the three wind belts and the polar front.

Other lessons examine cyclones, monsoons and weather fronts. You'll see what causes El Nino and La Nina and look at ocean oscillation. After watching these lessons, you should be ready to answer questions about:

  • The single-cell model of general circulation
  • Semi-permanent pressure cells and what they do
  • Global wind patterns
  • Rossby waves
  • Types of wind and breezes
  • Jet streams
  • Pacific, Arctic and North Atlantic oscillations
  • Weather fronts and air masses

These engaging lessons average about five minutes in length and can be viewed anytime on a computer or mobile device. They are developed and taught by expert instructors, who can be contacted for more information if you have questions. A multiple-choice quiz follows each lesson, and these quizzes allow you to assess your knowledge and see where you need extra review.

15 Lessons in Chapter 20: Air Distribution & Movement
Test your knowledge with a 30-question chapter practice test
Atmospheric Circulation: Scale & Observation

1. Atmospheric Circulation: Scale & Observation

Atmospheric circulation is responsible for the weather you experience. This lesson will explain how atmospheric circulation works and then it will explore how it impacts the weather in a couple of different locations.

The Single-Cell Model of General Circulation

2. The Single-Cell Model of General Circulation

Have you ever wondered how air circulates in the atmosphere? This lesson will explain an early model of air circulation, the single-cell model. It will also look at some of the problems with this early model of air circulation.

The General Circulation of the Atmosphere

3. The General Circulation of the Atmosphere

The Sahara Desert, tropical rainforests, and cold polar winds are all due to Earth's rotation. In this video lesson, you will learn how this rotation has created global air circulation patterns on Earth and how it is responsible for such diverse climate patterns across the globe.

The Effects of Semi-Permanent Pressure Cells

4. The Effects of Semi-Permanent Pressure Cells

Although semi-permanent pressure cells don't sound particularly exciting, they actually are. This lesson will describe how pressure systems develop and examine four semi-permanent pressure cells.

The Global Wind Patterns of the Three Wind Belts

5. The Global Wind Patterns of the Three Wind Belts

You are familiar with wind, but did you know there are different wind belts depending on where you are on the earth? This lesson will examine the three main wind belts: polar easterlies, tropical easterlies and prevailing westerlies.

Jet Streams & the Polar Front

6. Jet Streams & the Polar Front

You've probably heard about jet streams during the news weather segment. But what is a jet stream? This lesson will explain how jet streams form, what they are and then will focus on the polar jet stream.

Rossby Waves & Cyclonic Activity

7. Rossby Waves & Cyclonic Activity

Chances are you've never heard of a Rossby wave, but these waves are important players in the weather patterns you observe on a daily basis. This lesson will explore Rossby waves and then we'll explain how Rossby waves are related to cyclones.

Monsoons & Monsoonal Circulations

8. Monsoons & Monsoonal Circulations

Monsoons bring a seasonal change in weather to many parts of the world. This lesson will explore two monsoonal circulations and will also discuss how monsoons impact the people who experience them.

Air Conditions of Different Types of Wind

9. Air Conditions of Different Types of Wind

Winds are all the same, right? Actually no. This lesson will examine different types of wind including the Chinook, a type of foehn wind, and the Santa Ana winds, a type of katabatic wind.

Air Conditions of Different Types of Breezes

10. Air Conditions of Different Types of Breezes

Breezes are light winds, but did you know there are different types of breezes? This lesson will examine sea, land, valley and mountain breezes, explaining how they form and where you can find them.

The Relationship Between El Nino & La Nina

11. The Relationship Between El Nino & La Nina

In this video lesson, you will learn about El Niño and La Niña. You will understand the differences between them, as well as some of their effects on both ocean waters and weather patterns on land.

El Niño, La Niña & Walker Circulation

12. El Niño, La Niña & Walker Circulation

This lesson will explore how the Walker Circulation works, as well as El Niño and La Niña. It will include how these weather patterns impact weather patterns around the world.

The Pacific Decadal Oscillation & El Nino

13. The Pacific Decadal Oscillation & El Nino

Understanding the Pacific Decadal Oscillation, or the PDO, and El Niño allows scientists to better understand weather phenomenon. This lesson explores the PDO, as well as its similarities with El Niño and La Niña.

Arctic Oscillation & North Atlantic Oscillation

14. Arctic Oscillation & North Atlantic Oscillation

You've probably never thought much about the Arctic Oscillation or the North Atlantic Oscillation, but these weather phenomena impact global climates. This lesson explores each oscillation and describes the weather patterns associated with them.

Air Masses and Weather Fronts

15. Air Masses and Weather Fronts

After completing this lesson, you will be able to explain what an air mass is, and how the movement of weather fronts leads to weather patterns you see every day. A short quiz will follow.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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