WP 3 - Urban Climate
Responsible Contacts:
Prof. Dr. Lutz Katzschner and Dipl.-Ing. René Burghardt (University of Kassel, Department of Environmental Meteorology)
Main Objectives
The overall aim of WP 3 is the creation of climate functional maps to describe the urban climate in regards to thermal stress, climate comfort and ventilation (Gagge et al. 1986; Jendritzky et al. 1990; VDI 1998; Soligo et al. 1998). These parameters are closely connected to the urban design. It is also an objective to investigate the impacts of different building structures on urban climate. The results of this research shall be integrated into information and decisions support systems which assist climate adapted urban planning and the demands of the other disciplines.
The main objective in Urban Climate investigation is to develop an urban climate map with recommendations for urban development. In different steps, through a GIS calculation system and the information of previous measurements, an urban climatic map was drawn. Based on the information building volumes, openness and city structure a calculation was carried out, depending on the transformation of these layers to urban climate classification system. Cooling factors, heat storage capacities and ventilation factors (roughness) forms the urban climate map characterized by thermal loads and air mass exchange quality.
Urban climate layers and classification
layers | urban climate aspect | data used | classification with weighting factors |
building volume | heat storage | building information and land use | building volume in m3 |
built up areas and openness | heat storage and ventilation | building information and land use | % relation of built to non-built areas |
cold and fresh air production, green areas | heat balance of surfaces production of fresh and cool air, influencing neighbourhoods | land use classification, surface conditions | in m3 /m2*h as cooling rate
|
roughness, air paths and ventilation | land use, openness, use of background wind and local circulations | land use and openness surface data | zo derived from the wind profile |