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8.17: Effect of Latitude on Climate

Difficulty Level: Basic Created by: CK-12
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Do you want to be a Snowbird?

A Snowbird is usually a person who is retired. Like a migrating bird, they go where the weather is good. A snowbird may spend summers "at home" in Michigan or New York. But they travel to Florida or Arizona to spend their winters in the sun and warmth. What would a reverse snowbird be? A person who spent summers in the 100+ degree heat and winters in the sub-0 cold. Brrrr....

Latitude and Climate

Latitude is the distance north or south of the equator. It’s measured in degrees, from 0° to 90°. Several climate factors vary with latitude.

Latitude and Temperature

Temperature changes with latitude. You can see how in Figure below

  • At the equator, the sun’s rays are most direct. This is where temperatures are highest.
  • At higher latitudes, the sun’s rays are less direct. The farther an area is from the equator, the lower is its temperature.
  • At the poles, the sun’s rays are least direct. Much of the area is covered with ice and snow, which reflect a lot of sunlight. Temperatures are lowest here.

Temperature varies with latitude. If you look closely you can see that other factors influence temperature. Mountain ranges, for example, are cooler than they should be for their latitude.

How Much Does Latitude Change Temperature?

(a) Austin, Texas; (b) Wichita, Kansas; (c) Fargo, North Dakota; (d) Manitoba, Canada.

Austin, Texas; Wichita, Kansas; Fargo, North Dakota; and Thompson, Manitoba in Canada all roughly lie on the 97° west longitude line. But they run the length of the North America from 30°N in Austin, to 38°N in Wichita, to 47°N in Fargo, and to 56°N in Thompson. Other factors affect their climate, but all four cities are inland.

July avg high July avg low January avg high January avg low
Austin 96 74 62 41
Wichita 93 70 43 22
Fargo 82 60 18 0
Thompson 73 48 -3 -20

The Table above shows the variation in high and low temperatures that are due primarily to latitude. Which latitude would you prefer?

Summary

  • Latitude affects the amount of solar radiation a place receives.
  • The amount of solar radiation a place receives is greatest at the equator and lessens toward the poles.
  • Latitude is not the only factor that determines the temperature of a region.

Practice

Use this resource to answer the questions that follow.

Basics of Geography: Climate at http://www.youtube.com/watch?v=95TtXYjOEv4 (9:03)

  1. What is climate?
  2. What influences a region's climate?
  3. What is latitude?
  4. What is the climate at the Equator?
  5. What is the Tropic of Cancer and the Tropic of Capricorn?
  6. What is the climate of the area between the Tropic of Cancer and Tropic of Capricorn?
  7. What are the middle latitudes?
  8. Describe the polar regions.
  9. What is elevation?
  10. How does elevation affect climate?

Review

  1. How do you explain the variation in temperature from Austin, Texas to Thompson, Manitoba, Canada?
  2. What are two reasons that solar radiation is different at different latitudes?
  3. Look at the map of temperature versus latitude around the globe. Why are the bands not straight across? What else affects the temperature of a region?

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Difficulty Level:

Basic

Grades:

6 , 7

Date Created:

Jan 04, 2013

Last Modified:

Aug 24, 2014
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