Temperature formulas (Heat Stress Overlay): Difference between revisions
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m Frank@tygron.nl moved page Temperature formulas (Heat Overlay) to Temperature formulas (Heat Stress Overlay) |
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where | where | ||
* <math>T_{a,t}</math> is the calculated [[Temperature_atmosphere_result_type_( | * <math>T_{a,t}</math> is the calculated [[Temperature_atmosphere_result_type_(Heat Stress Overlay)|atmospheric temperature]] at time t; | ||
* <math>T_{station,t}</math> is the [[Hourly_temperature_( | * <math>T_{station,t}</math> is the [[Hourly_temperature_(Heat Stress Overlay)|temperature]] measured at a weather station at time t; | ||
* <math>UHI_{max,t}</math> is the calculated [[UHI_formula_( | * <math>UHI_{max,t}</math> is the calculated [[UHI_formula_(Heat Stress Overlay)|Urban Heat Island]] effect at time t; | ||
* <math>f_{sun,t}</math> is the [[Sun_daily_motion_( | * <math>f_{sun,t}</math> is the [[Sun_daily_motion_(Heat Stress Overlay)|sun daily motion factor]] at time t; | ||
==Wet-bulb Temperature formula== | ==Wet-bulb Temperature formula== | ||
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* <math>T_{w,t}</math> is the calculated wet-bulb temperature; | * <math>T_{w,t}</math> is the calculated wet-bulb temperature; | ||
* <math>T_{a,t}</math> is the calculated atmospheric temperature; | * <math>T_{a,t}</math> is the calculated atmospheric temperature; | ||
* <math>\phi</math> is the [[Sun_altitude_( | * <math>\phi</math> is the [[Sun_altitude_(Heat Stress Overlay)|sun altitude angle]]; | ||
* Constant values are sourced from the {{Heat DPRA Report}}; | * Constant values are sourced from the {{Heat DPRA Report}}; | ||
Latest revision as of 11:42, 13 April 2026
Two temperature formulas are used in the calculation of the PET value:
Atmospheric Temperature formula
where
- is the calculated atmospheric temperature at time t;
- is the temperature measured at a weather station at time t;
- is the calculated Urban Heat Island effect at time t;
- is the sun daily motion factor at time t;
Wet-bulb Temperature formula
where:
- is the calculated wet-bulb temperature;
- is the calculated atmospheric temperature;
- is the sun altitude angle;
- Constant values are sourced from the DPRA Heat stress report;
See also
- ↑ Wikipedia • Wet-bulb temperature • https://en.wikipedia.org/wiki/Wet-bulb_temperature • Last visited: 20-12-2019
