Shaing efficiency of different urban tree species – ivestigation of popular urban shadetrees in Szeged, Hungary
DOI:
https://doi.org/10.56617/tl.3637Keywords:
urban ecology, urban tree, shading effect, transmissivityAbstract
Trees provide several beneficial services for the residents in urban ecosystems. By interception of stormwater, they reduce the risk of flood events; improve the air quality by filtering out air pollutants, as well as they enhance the well-being of citizens due to their aesthetical value and microclimate regulation services. Several studies, based on field measurements or numerical simulations, have already demonstrated that trees have major potential to mitigate the level of human heat stress, first and foremost due to their shade. The efficiency of shadowing, i.e. the sunshine reduction can be characterized with the tree canopy transmissivity (solar permeability), which varies not only among species but depends also on the annual change of the foliage as well as its health conditions. There is a lack of knowledge concerning the bioclimatic effect of urban forestry and single trees in Central-European climate conditions. Therefore the aim of this study is to investigate the solar radiation reduction capacity of four species used frequently as urban trees in Hungarian towns: small-leaved linden – Tilia cordata, pagoda tree – Sophora japonica, common hackberry – Celtis occidentalis, as well as horse-chestnut – Aesculus hippocastanum. We have considerably little knowledge about the small-scale microclimatic effects of urban trees among Central European circumstances. With our work, we would like to aid future studies, therefore, we put an emphasis on discussing methodological issues of measurements practical implementation.
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