Andreas Matzarakis, University of Freiburg, Freiburg, Germany

Presentation Title: Estimation of urban bioclimate by micro-scale models for the development of mitigation and adaptation possibilities



In order to analyze urban bioclimate and climate, several input and output parameters are required. The quantification of thermal bioclimate assessment methods based on the human energy balance builds the basis of all the known thermal indices. Some data and information can be obtained from measurement or simulated by micro-scale models. This information, in combination with shade, sunshine duration, wind speed and direction in simple and complex environments can be derived by RayMan and SkyHelios models. The models are not only able to calculate, but also visualize climate and urban climate information based on grid and vector data. The information can be derived for different spatial and temporal scales depending on the aim and the demands. The Climate Mapping Tool can visualize most of the demanded urban climate data and data formats in combination with SkyHelios. All three models are linked together and can exchange relevant inputs and information.

Key Lessons Learned

  • Equivalent temperatures are a possibility as a parameter for bioclimate assessments of thermal comfort, cold and heat stress.
  • The application possibilities of the models (RayMan and SkyHelios) cover several fields of human-biom-eteorology, including urban climate issues in the micro-scale.
  • Mitigation and adaptation possibilities based on human thermal comfort can be analyzed and quantified.

Policy/Practice Implications of Research

  • The concept of equivalent temperature based on the human-energy balance including air temperature, humidity, radiation, wind, clothing and activity, etc., provides clearer and more useful information that can be translated to policymakers and planners.
  • Long-term analysis of temperature, specifically the differences in physiological equivalent temperature, which is an indicator for the impacts of climate change on the thermal comfort of humans, can influence policymaking.

Knowledge Gaps and Needs

  • Cities in the era climate change require more information about microclimate conditions, as these form the urban climate.
  • Most studies currently focus on hotspot analysis, but long-term analyses are also needed.
  • How can we more effectively use data visualization and transfer to communicate the information to planners and architects?