Abstract : 1C.30
Climate of cities urban heat island and urban induced precipitation, effect on humanity
Babajide Mojeed Farinde
Pollution Hazards Free Environmental Group
Concerned about air quality and energy consumption has sprawled a large number of studies on Urban Climate. A knowledge of the climate of city has many important applications, particularly in Bio-climatology(The study of the relations of Climate and Live) . . The Climate of such areas differ from those of open country in many ways and so serious air pollution is mainly found in Cities. Since much of the World’s population lives in built-areas, this subject is of great importance. There is growing evidence that the Urban Environment contributes substantially to illness and Morbidity, particularly in the case of Respiratory Diseases. This is the evidence in that building streets, parking lots and industrial plants of a city have quite different properties from open country as regards (1) Storage of heat (2)Storage of water(3) Absorption of solar radiation and (4)All components of the hydrological circle, viz, Evaporation percolation, Runoff and Water Storage.
In addition, Cities releases a great deal of heat to the atmosphere from furnaces, automobiles and other fuel consuming activities. A direct consequence of these factors is that the Boundary Layer over a city is quiet unlike that over the surrounding country. Therefore both long wave and Short wave radiation are raised even through the duration of sunshine is reduced, humidity is reduced but there is some increase in Urban induced precipitation. Cloud amounts increased, Fogs are thicker, occur more frequently and are more persistent, thus impairing Visibility.For this reasons, there is increasing interest in special Micro- Meteorology Studies of a city as it affect humanity which is the subject of this Paper. It is based on the need for a detailed description of heat, water vapour and pollution sources strengths and emission heights throughout the Urban areas. Only then will it be possible to arrive at some reasonable estimate of the Energy Budgets of a City and so avert any disaster that may befe