14:37 Jan 20, 2009 |
English language (monolingual) [PRO] Science - Environment & Ecology / ecologie urbana | |||||
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| Selected response from: Kim Metzger Mexico Local time: 23:11 | ||||
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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4 +5 | dome created over an urban or industrial area |
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3 +2 | increased temperatures within a city |
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Discussion entries: 3 | |
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dome created over an urban or industrial area Explanation: heat island effect Definition Higher-temperature 'dome' created over an urban or industrial area by hot air layers forming at building top or chimney top level. This dome is about 5°C to 7°C (about 40°F to 45°F) warmer than air above it and the ground level temperature, and can trap all polluting emissions within its confines. Most noticeable at night and early morning periods, it normally disperses by midday when the ambient temperature increases. See also temperature inversion. http://www.businessdictionary.com/definition/heat-island-eff... Heat island - An area, such as a city or industrial site, having consistently higher temperatures than surrounding areas because of a greater retention of heat, as by buildings, concrete, and asphalt. http://www.answers.com/topic/urban-heat-island |
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