Urban heat island: Difference between revisions
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The term "heat island" describes built up areas that are hotter than nearby rural areas. The annual mean air temperature of a city with 1 million people or more can be | The term "heat island" describes built up areas that are hotter than nearby rural areas. The annual mean air temperature of a city with 1 million people or more can be 1–3°C warmer than its surroundings. [http://www.epa.gov/heatisland/index.htm] | ||
The temperature in Atlanta is 5 to 8 degrees Fahrenheit higher than outlying areas, and this excess heat produces increased rainfall and thunderstorms. [http://science.nasa.gov/newhome/headlines/essd26apr99_1.htm] | The temperature in Atlanta is 5 to 8 degrees Fahrenheit higher than outlying areas, and this excess heat produces increased rainfall and thunderstorms. [http://science.nasa.gov/newhome/headlines/essd26apr99_1.htm] | ||
This temperature gradient can gradually increase; for example, from 1945 to 1990 San Antonio has apparently gotten 3°C warmer than nearby New Braunfels. [http://www.swri.org/3pubs/ttoday/fall97/heat.htm] | This temperature gradient can gradually increase; for example, from 1945 to 1990 San Antonio has apparently gotten 3°C warmer than nearby New Braunfels. [http://www.swri.org/3pubs/ttoday/fall97/heat.htm] | ||
Revision as of 15:19, 26 January 2009
The term "heat island" describes built up areas that are hotter than nearby rural areas. The annual mean air temperature of a city with 1 million people or more can be 1–3°C warmer than its surroundings. [1] The temperature in Atlanta is 5 to 8 degrees Fahrenheit higher than outlying areas, and this excess heat produces increased rainfall and thunderstorms. [2]
This temperature gradient can gradually increase; for example, from 1945 to 1990 San Antonio has apparently gotten 3°C warmer than nearby New Braunfels. [3]