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To identify the heat-holding structures, scientists use infrared images. Infrared images record heat. Red objects are hot in the picture of Sacramento and Baton Rouge; they are 65°C to 71°C. That kind of heat melts candles and crayons fast! Objects that are blue are cooler—they may be 25°C to 40°C. In the summer, what color do you think roads and the rooftops of buildings are in the infrared images? What about water and vegetation? Visit these Web sites to find out! To learn more about the heat-island effect: 1. Visit this Web site. 2. Then look at these photos. Remember: Red is hot. Blue is cool. 3. For more information, visit this Web site. 4. Then return to this page and click the Go on arrow. |
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