The Energy Model of Urban Heat Island

Despite the fact that presence of a heat island over city was established quite long time ago, now there is no versatile algorithm for determination urban intensity. The proposed models either take into account only one or several factors formation an do not consider physical reasons difference in thermodynamic conditions between and countryside. In this regard, it impossible to make forecast determine optimal methods reducing intensity arbitrarily chosen wide range its characteristics climatic conditions. This paper studies causes order develop quantitative model process through radiation fluxes various nature countryside (background area). A new equation allowing different seasons times day, as well under atmospheric conditions, be calculated from meteorological parameters measured at stationary observation station proposed. has been tested comparison results numerical simulation with direct measurements Tomsk mobile station. It shown main contributors are anthropogenic emissions (80–90% winter, 40–50% summer) absorption shortwave by underlying surface (5–15% summer). longwave surface, water vapor other constituents, consumption evaporation insignificant. An increase turbulent flux responsible outflow absorbed energy summer 20–30% winter.