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Heat islands: Difference between revisions
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(Created page with "== Introduction == Urban heat islands (UHIs) are metropolitan areas that are significantly warmer than their surrounding rural areas due to human activities. The term "heat island" describes built up areas that are hotter than nearby rural areas. The UHI effect is most noticeable during the summer or dry season. == Formation == Heat islands form as cities replace natural land cover with pavement, buildings, and other infrastructure. These su...") |
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Heat islands form as cities replace natural land cover with pavement, buildings, and other infrastructure. These surfaces absorb - rather than reflect - the sun's heat, causing surface temperatures and overall ambient temperatures to rise. The lack of vegetation also means that less cooling through [[Photosynthesis|photosynthesis]] is taking place. | Heat islands form as cities replace natural land cover with pavement, buildings, and other infrastructure. These surfaces absorb - rather than reflect - the sun's heat, causing surface temperatures and overall ambient temperatures to rise. The lack of vegetation also means that less cooling through [[Photosynthesis|photosynthesis]] is taking place. | ||
[[Image:Detail-145165.jpg|thumb|center|Aerial view of a city with a clear distinction between the urban and rural areas.]] | |||
== Factors Contributing to Heat Islands == | == Factors Contributing to Heat Islands == | ||