En studie av Uppsala stads värmeö
The urban heat island is an area restricted to a city center where the temperatureis higher than its surrounding environment. The greatest temperature difference isfound at night when the weather is calm and the sky is clear of clouds. There are twomajor causes behind this phenomena and the first one is the use of energy forheating of houses. The heat leaks through the walls of the buildings and warms upthe surrounding mass of air. The second one is the use of building material whichstore the suns radiation on daytime and releases the heat during night. The heatisland leads to larger costs for cooling buildings. It also has an effect on humanhealth, since increased temperatures lead to heat stress which may be fatal. Thisreport aims to investigate if there is an urban heat island located over Uppsala cityand how it can affect daily life for the citizens. To find out how big the urban heatisland effect is in Uppsala city, a number of temperature measurements whereconducted. The results show that there is a visible temperature difference betweenurban and rural areas.