urban heat island

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urban heat island

[′ər·bən ′hēt ‚ī·lənd]
(meteorology)
Increased urban temperatures of 1-2°C higher for daily maxima and 1-9°C for daily minima compared to rural environs resulting from changes in moisture balance due to impermeable surfaces, decreased humidity, or alteration in heat balance.
References in periodicals archive ?
The new report notes that Urban Heat Islands disproportionately impact environmental justice communities, which suffer the cumulative impacts of environmental burdens.
Counting key causes of the heat island effects, he said removal of green areas, rapid rise in motor vehicles, soaring building construction activities, modification of land surfaces, emission of heat from air conditioning units and encroachment on natural waterways or rainwater drains have converted the urban centres into heat islands, making them unlivable.
Islamabad -- Federal Climate Change Minister, Senator Mushahidullah Khan, on Sunday urged the federal and provincial forest officials to boost urban forestry at national scale to protect urban areas from heat waves and from becoming heat islands.
Urban heat islands are best described as the temperature gradient difference between developed and undeveloped areas.
The town provides an example of the urban heat island effect in the Arctic.
The objective of this work was to study the impact of urbanization on development of urban heat island (UHI) of Karachi city.
The intensifying urban heat island (UHI) effect is the primary driver for the growth of this market.
As global temperatures increase, urban areas are "experiencing a kind of double whammy," according to UCLA's Dennis Lettenmaier, who coauthored a new study in Environmental Research Letters showing that a combination of general increases in temperature along with the heat island effect is leading to more extreme heat events in cities.
Key word: urbanization, local climate, population change, PMD, Urban Heat Island
Among the causes of urban heat island occurrence is the lack of vegetation and high absorption of solar radiation on the surface of the city [1].