1. Chapter 5 Global Temperatures
Geosystems 6e
An Introduction to Physical Geography
Robert W. Christopherson
Charles E. Thomsen

2. Earth’s Temperature Patterns
Isotherm – an isoline (a line of constant value) that connects points of equal temperature
Thermal equator – isotherm connecting all points of highest mean temperature
January Temperature Map  
Thermal equator movement southward
More pronounced over large continents
July Temperature Map  
Thermal equator movement northward

3. January Temperatures
Figure 5.14

4. July Temperatures
Figure 5.16

5. Global Temperature Ranges
Figure 5.17

6. Arctic Sea Ice Changes
Figure HLC 5.1.1

7. Air Temperature and the Human Body
Wind chill – the apparent temperature when you take wind speeds into account
Correlates cold and wind speed
Heat index – the apparent temperature when you take humidity into account
Correlates heat and humidity

8. Wind Chill Table
Figure FS 5.1.1

9. Heat Index Table
Figure FS 5.1.2