Temperature formulas (Heat Overlay): Difference between revisions
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Two temperature formulas are used in the calculation of the PET value: | |||
* The atmospheric temperature T<sub>a</sub> | |||
* The wet-bulb temperatur T<sub>w</sub> | |||
==Atmospheric Temperature formula== | ==Atmospheric Temperature formula== | ||
T<sub>a,t</sub> = T<sub>station,t</sub> + UHI<sub>max,t</sub> * f<sub>sun,t</sub><br> | T<sub>a,t</sub> = T<sub>station,t</sub> + UHI<sub>max,t</sub> * f<sub>sun,t</sub><br> | ||
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* UHI<sub>max,t</sub> is the calculated [[UHI_formula_(Heat_Overlay)|Urban Heat Island]] effect at time t; | * UHI<sub>max,t</sub> is the calculated [[UHI_formula_(Heat_Overlay)|Urban Heat Island]] effect at time t; | ||
* f<sub>sun,t</sub> is the [[Sun_daily_motion_(Heat_Overlay)|sun daily motion factor]] at time t; | * f<sub>sun,t</sub> is the [[Sun_daily_motion_(Heat_Overlay)|sun daily motion factor]] at time t; | ||
==Wet-bulb Temperature formula== | |||
==See also== | |||
* [https://en.wikipedia.org/wiki/Wet-bulb_temperature] | |||
Revision as of 13:53, 11 September 2019
Two temperature formulas are used in the calculation of the PET value:
- The atmospheric temperature Ta
- The wet-bulb temperatur Tw
Atmospheric Temperature formula
Ta,t = Tstation,t + UHImax,t * fsun,t
where,
- Ta,t is the calculated atmospheric temperature at time t;
- Tstation,t is the temperature measured at a weather station at time t;
- UHImax,t is the calculated Urban Heat Island effect at time t;
- fsun,t is the sun daily motion factor at time t;