International Journal of Biometeorology

, Volume 54, Issue 4, pp 479–483 | Cite as

Climate change and thermal bioclimate in cities: impacts and options for adaptation in Freiburg, Germany

Short Communication


The concept of physiologically equivalent temperature (PET) has been applied to the analysis of thermal bioclimatic conditions in Freiburg, Germany, to show if days with extreme bioclimatic conditions will change and how extreme thermal conditions can be modified by changes in mean radiant temperature and wind speed. The results show that there will be an increase of days with heat stress (PET > 35°C) in the order of 5% (from 9.2% for 1961–1990) and a decrease of days with cold stress (PET < 0°C) from 16.4% to 3.8% per year. The conditions can be modified by measures modifying radiation and wind speed in the order of more than 10% of days per year by reducing global radiation in complex structures or urban areas.


Thermal bioclimate REMO Freiburg Physiologically equivalent temperature 



This research study is supported by the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF) in the allowance of “Klimazwei” (01LS05019). Thanks to the German Weather Service (DWD) for the provision of climate data of Germany.


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Copyright information

© ISB 2010

Authors and Affiliations

  1. 1.Meteorological InstituteUniversity of FreiburgFreiburgGermany

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