DETERMINATION OF AN URBAN TEMPERATURE MONITORING NETWORK USING GIS METHODS
LELOVICS ENIKŐ, UNGER J., GÁL T.
ABSTRACT. Determination of an urban temperature monitoring network using GIS methods. Local Climate Zones (LCZ) classification system describes the physical conditions of a local-scale environment of a measuring site from the viewpoint of the generated local thermal climate. It is based on quantitative geometric, radiative and thermal properties of the surface. Using GIS methods on the available vector-based and raster-based databases, six built LCZ types were distinguished and mapped in the studied urban area, in a South-Hungarian city. Spatial pattern of temperature surplus – defined as the temperature excess of the built-up areas compared to the temperature of non-built area – was estimated for the whole study area with the application of an empirical model.Appropriate locations of measurement sites were determined considering the two mentioned information sources. First, homogeneous LCZ areas with a radius of a few hundred meters should be around the sites, and the number of the sites should be roughly proportional to the areas of the corresponding LCZs. Second, sites should be located at around the high and low temperature surplus areas, as well as at around the areas of the local maxima and stretches assumed by the modelled pattern. After this designation the sites were adjusted regarding our local knowledge (e.g. representative micro-environment, appropriate circumstances to place the instruments). The representativeness of the network could be evaluated through the estimation of the expected geometric error.
Keywords: urban climate, Local Climate Zones, urban network, Szeged, Hungary.