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Glossary and Abbreviations
This glossary has been compiled using definitions found on European Commission,
Intergovernmental Panel on climate Change and other relevant sources, with brief
descriptions provided on main topics.
Rectal temperature – Tre (°C).
Tskm – mean skin temperature (°C).
Tskfc – face skin temperature (°C).
Mskdot – sweat production (g/min).
Shiv – heat generated by shivering (W).
wettA – skin wittedness (%) of body area.
VblSk – skin blood flow (%) of basal value.
DTS – Dynamic Thermal Sensation
Physiologically Equivalent Temperature The Physiologically Equivalent
Temperature (PET) is the equivalent temperature at a given place (outdoors or
indoors) to the air temperature in a typical indoor setting with core and skin temperatures equal to those under the conditions being assessed. Thereby, the heat
balance of the human body with a work metabolism 80 W (light activity, added
to basic metabolism) and a heat resistance of clothing 0.9 clo) is maintained
(Höppe 1999).
The Universal Thermal Climate Index UTCI (Jendritzky et al. 2012) is defined
as the air temperature (Ta) of the reference condition causing the same model
response as the actual condition. Thus, UTCI represents the air temperature,
which would produce, under reference conditions, the same thermal strain as in
the actual thermal environment.
Both meteorological and non-meteorological (metabolic rate and thermal resistance of clothing) reference conditions were defined:
• wind speed (v) of 0.5 m/s at 10 m height (approximately 0.3 m/s in 1.1 m),
• mean radiant temperature (Tmrt) equal to air temperature,
• vapor pressure (VP) that represent relative humidity of 50 %, at high air temperatures (>29 °C) the reference air humidity is defined as 20 hPa.
Glossary and Abbreviations
This glossary has been compiled using definitions found on European Commission,
Intergovernmental Panel on climate Change and other relevant sources, with brief
descriptions provided on main topics.
Rectal temperature – Tre (°C).
Tskm – mean skin temperature (°C).
Tskfc – face skin temperature (°C).
Mskdot – sweat production (g/min).
Shiv – heat generated by shivering (W).
wettA – skin wittedness (%) of body area.
VblSk – skin blood flow (%) of basal value.
DTS – Dynamic Thermal Sensation
Physiologically Equivalent Temperature The Physiologically Equivalent
Temperature (PET) is the equivalent temperature at a given place (outdoors or
indoors) to the air temperature in a typical indoor setting with core and skin temperatures equal to those under the conditions being assessed. Thereby, the heat
balance of the human body with a work metabolism 80 W (light activity, added
to basic metabolism) and a heat resistance of clothing 0.9 clo) is maintained
(Höppe 1999).
The Universal Thermal Climate Index UTCI (Jendritzky et al. 2012) is defined
as the air temperature (Ta) of the reference condition causing the same model
response as the actual condition. Thus, UTCI represents the air temperature,
which would produce, under reference conditions, the same thermal strain as in
the actual thermal environment.
Both meteorological and non-meteorological (metabolic rate and thermal resistance of clothing) reference conditions were defined:
• wind speed (v) of 0.5 m/s at 10 m height (approximately 0.3 m/s in 1.1 m),
• mean radiant temperature (Tmrt) equal to air temperature,
• vapor pressure (VP) that represent relative humidity of 50 %, at high air temperatures (>29 °C) the reference air humidity is defined as 20 hPa.