Urban Heat Island

According To United States Environmental Agency (2009) heat island IS Defined As An urbanized area Which Is Hotter Than The am and is Surrounding Rural Areas. According To Magazine of Technology (2009) Urban heat effects IS Experienced When Temperatures Rise Of An urban area Beyond the temperatures and areas of The Suburban Even In The rural regions. According To Heat Island Group of (2000) it has-been found in That Summer, The Temperature Of The Air In The Surrounding Urban Areas Between Would rise to 6 o F has about 8 Beyond the temperatures Of The Surrounding rural areas. Therefor it Means That It Is The activities Taking place in the urban areas "Which Influences The climate of Those cities. Thesis activities result Into Complex Processes Which Are the Influential Factors In The temperature change in cities. The causes of urban heat effects include destruction of natural vegetation The Because Of The construction of buildings together with Other infrastructure in the urban areas ". Which Waste heat are released from The Vehicles Being Together With heat released from factories and industrial plants Other more air conditioners found In These cities are major contributors of aussi high temperatures in the urban areas ".

Contributing Factor to Urban Heat Effects

Destruction of trees and vegetation are Some Of The causes of urban heat effects. That it has Been found trees and Other Vegetation Contribute to cooling effects of The surroundings. The removal of soil and replacement of pavement has great contribution. Soil absorbed and do not retain Much heat. It Provides natural cooling effect Therefor Reduces heating atmospheric air Of The Surrounding the Environment (Larry, 2009). Pavements That Are Being Constructed in the Cities to replace soil Which Provide cooling affect nature est aussi Another cause Because Of Their high heat absorption and retention (Roy, 2007).

According To Michael (2004) It May Be The Human Beings Themselves That causes the urban heat effect Because In The previous century only TWO PERCENT of the total population in the urban areas WAS purpose There Are Currently about twenty five percent of the total population In The Whole World Who are residing in towns and cities. In the Developed Countries With VAST Industrialized capacity, More Than Fifty Percent Of The population lives in town. The migration of people from rural area to urban center Is A Factor Leading to urban heat island. The development of cities in terms of thesis and infrastructure industries are aussi contributors. According To Kalnay and Cai (2003) They Tried to Determined The rate at Which land use causes Climatic Change as Opposed to urbanization & the land uses result WAS That Will Contribute to only a mean daily temperature Increase of 0.35 o C per century Which Is lower Compared To Increase temperature as a result of ace Urbanization. In United States of America It Was Also Noted That human effect in small towns in The Suburban aussi Had a Significant Increase in due to temperatures. The difference in temperature WAS To Be Noted not Less than 0.1o C. The United States And The global mean temperatures mean temperatures. The urbanization effects Were Recorded To Have Higher In The exchange temperature difference Which WAS Recorded in different periods. THEY found That There Was global warming Between 1900 to 1940, global cooling Düring 1940 to 1965 and Another Period of global worming from 1965 to 2000 (Hansen, Ruedy, Imhoff, Lawrence, Easterling, Peterson, and Carl, 2001).

According To United States Environmental Agency (2009) it has been "Noted With That a city has population of More Than One Million People Will Experience Annual mean temperature of 1 ° C to 3 ° C. Higher Than Surrounding icts Whereas evening temperatures Can Have a difference of 12o C. Between temperatures of the City & the Rural Areas Surrounding it. According To Michael (2004) buildings and other material Such as asphalt concrete as well as "wh.