Difference between revisions of "Urban heat island"

From Glossary of Meteorology
imported>Perlwikibot
(Created page with " {{TermHeader}} {{TermSearch}} <div class="termentry"> <div class="term"> == urban heat island == </div> <div class="definition"><div class="short_definition">(<br/>''O...")
 
imported>Rbrandt
 
(2 intermediate revisions by one other user not shown)
Line 7: Line 7:
 
   <div class="term">
 
   <div class="term">
 
== urban heat island ==
 
== urban heat island ==
  </div>
 
  
<div class="definition"><div class="short_definition">(<br/>''Or'' heat island.) Closed isotherms indicating an area of the surface that is relatively  warm; most commonly associated areas of human disturbance such as towns and cities.</div><br/> <div class="paragraph">The physiographic analogy derives from the similarity between the pattern of isotherms and  height contours of an island on a topographic map. Heat islands commonly also possess &ldquo;cliffs&rdquo; at the urban&ndash;rural fringe and a &ldquo;peak&rdquo; in the most built-up core of the city. The annual [[mean  temperature]] of a large city (say 10<sup>6</sup> inhabitants) may be 1&deg;&ndash;2&deg;C warmer than before development,  and on individual [[calm]], [[clear]] nights may be up to 12&deg;C warmer. The warmth extends vertically  to form an urban heat dome in near calm, and an urban heat plume in more windy conditions.</div><br/> </div>
+
<div class="definition"><div class="short_definition">(''Or'' heat island.) Closed [[isotherm|isotherms]] indicating an area of the surface that is relatively  warm; most commonly associated with areas of human disturbance such as towns and cities.</div><br/>
</div>
+
 
 +
<div class="paragraph">The physiographic analogy derives from the similarity between the pattern of isotherms and  height contours of an island on a [[topography|topographic map]]. Heat islands commonly also possess "cliffs" at the urban&ndash;rural fringe and a "peak" in the most built-up core of the city. The annual [[mean temperature|mean  temperature]] of a large city (say 10<sup>6</sup> inhabitants) may be 1&#x000b0;&ndash;2&#x000b0;C warmer than before development,  and on individual [[calm]], [[clear]] nights may be up to 12&#x000b0;C warmer. The warmth extends vertically  to form an urban heat dome in near calm, and an urban heat plume in more windy conditions.</div><br/> </div>
 +
 
 +
<p>''Term edited 29 May 2020.''</p>
  
 
{{TermIndex}}
 
{{TermIndex}}

Latest revision as of 03:54, 29 May 2020



urban heat island

(Or heat island.) Closed isotherms indicating an area of the surface that is relatively warm; most commonly associated with areas of human disturbance such as towns and cities.

The physiographic analogy derives from the similarity between the pattern of isotherms and height contours of an island on a topographic map. Heat islands commonly also possess "cliffs" at the urban–rural fringe and a "peak" in the most built-up core of the city. The annual mean temperature of a large city (say 106 inhabitants) may be 1°–2°C warmer than before development, and on individual calm, clear nights may be up to 12°C warmer. The warmth extends vertically to form an urban heat dome in near calm, and an urban heat plume in more windy conditions.

Term edited 29 May 2020.