УДК 551.58:911.375.5 URBAN CLIMATOLOGY AND APPLICATIONS L. Katzschner University Kassel, Dept. Architecture and Planning, Institute of Environmental Meteorology, Germany Received by the editor 2 September 2008. <...> Conversion of industrial, military and non used train track areas to housing and service centres, the economical concentration and more densely built up inner cities are named as new urbanity. <...> Climatologically speaking this development leads to an increase of heat island, air pollution and a reduced ventilation of the cities. <...> At the example of Kassel it can be seen that this development has positive and negative factors. <...> Urban climate studies can be used to support ideas of architects and planners without destroying thermal and air quality comfort. <...> Especially the importance of open spaces and the thermal conditions there are taken as example to create a climatologically approved urban design. <...> From the definition of an ideal urban climate the different planning levels and climatic scales are combined. <...> Аннотация: Под влиянием демографического роста, развитие городов Германии происходит в трех основных направлениях: перепланировка промышленных зон, территорий военных объектов и неиспользуемых железнодорожных путей в районы жилой застройки и центры обслуживания; экономическая концентрация; уплотнение городской застройки. <...> На примере Кассела видно, что такое развитие имеет как положительные, так и отрицательные стороны. <...> This new urban development leads to an increasing roughness with reduced ventilation and higher air pollution and also to an increased heat island situation with thermal stress conditions. <...> Urban climate studies have to meet these subjects in order to give help for urban planners and architects. <...> The basic knowledge about urban climate has to be evaluated and transferred to planning practice and to answer their urgent questions. <...> But there is also a third aspect, which tend to be the opposite and occurs mainly in eastern Germany. © Katzschner L., 2008 Due to loss of people and industry there the population decreases and many houses and factories were destroyed. <...> Here new areas become free and can be climatologically used for ventilation and for an improvement of the open space climate. <...> In all these developments it is important that urban <...>