Theoretical and Applied Climatology

, Volume 135, Issue 3–4, pp 873–876 | Cite as

The potential of a modified physiologically equivalent temperature (mPET) based on local thermal comfort perception in hot and humid regions

  • Tzu-Ping LinEmail author
  • Shing-Ru Yang
  • Yung-Chang Chen
  • Andreas Matzarakis
Original Paper


Physiologically equivalent temperature (PET) is a thermal index that is widely used in the field of human biometeorology and urban bioclimate. However, it has several limitations, including its poor ability to predict thermo-physiological parameters and its weak response to both clothing insulation and humid conditions. A modified PET (mPET) was therefore developed to address these shortcomings. To determine whether the application of mPET in hot-humid regions is more appropriate than the PET, an analysis of a thermal comfort survey database, containing 2071 questionnaires collected from participants in hot-humid Taiwan, was conducted. The results indicate that the thermal comfort range is similar (26–30 °C) when the mPET and PET are applied as thermal indices to the database. The sensitivity test for vapor pressure and clothing insulation also show that the mPET responds well to the behavior and perceptions of local people in a subtropical climate.


Physiologically equivalent temperature mPET Thermal comfort Hot-humid regions 


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of ArchitectureNational Cheng Kung UniversityTainanTaiwan
  2. 2.Research Center for Environmental Changes, Academia SINICA, 11F of HSSBTaipeiTaiwan
  3. 3.Chair of Environmental Meteorology, Faculty of Environment and Natural ResourcesAlbert-Ludwigs-University FreiburgFreiburgGermany
  4. 4.Research Center Human BiometeorologyGerman Meteorological ServiceFreiburgGermany

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