UHI formula (Heat Stress Overlay) - Revision history

Frank@tygron.nl at 11:42, 13 April 2026

2026-04-13T11:42:04Z

← Older revision		Revision as of 11:42, 13 April 2026
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	where,		where,
	* <math>Q_{ql-avg}</math> is the [[Daily_avg_radiation_(~~Heat_Overlay~~)\|daily average global radiation]] in W/m<sup>2</sup>/hr		* <math>Q_{ql-avg}</math> is the [[Daily_avg_radiation_(Heat Stress Overlay)\|daily average global radiation]] in W/m<sup>2</sup>/hr
	* <math>C_{air}</math> is the air heat capacity in J. We use a value of 1007 J.		* <math>C_{air}</math> is the air heat capacity in J. We use a value of 1007 J.
	* <math>T_{station}</math> is the hourly [[Hourly_temperature_(~~Heat_Overlay~~)\|temperature]] measured at the station		* <math>T_{station}</math> is the hourly [[Hourly_temperature_(Heat Stress Overlay)\|temperature]] measured at the station
	* <math>\rho_{air}</math> is the calculated air density in kg/m<sup>3</sup>;		* <math>\rho_{air}</math> is the calculated air density in kg/m<sup>3</sup>;
	* <math>R_{specific}</math> is the [https://en.wikipedia.org/wiki/Specific_gas_constant specific gas constant] for dry air. We use a value of 287.058 J/(kg·K)		* <math>R_{specific}</math> is the [https://en.wikipedia.org/wiki/Specific_gas_constant specific gas constant] for dry air. We use a value of 287.058 J/(kg·K)
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	{{article end		{{article end
	\|seealso=		\|seealso=
	* [[Temperature_formulas_(~~Heat_Overlay~~)#Atmospheric Temperature formula\|Atmospheric temperature formula]]		* [[Temperature_formulas_(Heat Stress Overlay)#Atmospheric Temperature formula\|Atmospheric temperature formula]]
	\|references=		\|references=
	<references>		<references>

Frank@tygron.nl at 11:41, 13 April 2026

2026-04-13T11:41:46Z

← Older revision		Revision as of 11:41, 13 April 2026
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	where:		where:
	* S<sub>vf</sub> is the calculated [[Sky_view_avg_result_type_(~~Heat_Overlay~~)\|average sky view factor]];		* S<sub>vf</sub> is the calculated [[Sky_view_avg_result_type_(Heat Stress Overlay)\|average sky view factor]];
	* F<sub>veg</sub> is the calculated [[Vegetation_avg_result_type_(~~Heat_Overlay~~)\|average vegetation fraction]];		* F<sub>veg</sub> is the calculated [[Vegetation_avg_result_type_(Heat Stress Overlay)\|average vegetation fraction]];
	* S is the calculated [[#Daily average global radiation\|daily average global radiation]] in K m/s		* S is the calculated [[#Daily average global radiation\|daily average global radiation]] in K m/s
	* T<sub>max</sub> is the [[Daily_temperature_max_(~~Heat_Overlay~~)\|maximum temperature]] measured at a weather station between 8 AM and 7 AM the next day.		* T<sub>max</sub> is the [[Daily_temperature_max_(Heat Stress Overlay)\|maximum temperature]] measured at a weather station between 8 AM and 7 AM the next day.
	* T<sub>min</sub> is the [[Daily_temperature_min_(~~Heat_Overlay~~)\|minimum temperature]] measured at a weather station between 8 AM and 7 AM the next day.		* T<sub>min</sub> is the [[Daily_temperature_min_(Heat Stress Overlay)\|minimum temperature]] measured at a weather station between 8 AM and 7 AM the next day.
	* U is the [[Daily_avg_wind_speed_(~~Heat_Overlay~~)\|daily average wind speed]] measured at 10 meters above ground at a weather station.		* U is the [[Daily_avg_wind_speed_(Heat Stress Overlay)\|daily average wind speed]] measured at 10 meters above ground at a weather station.

	==Formula Decomposition==		==Formula Decomposition==

Frank@tygron.nl: Frank@tygron.nl moved page UHI formula (Heat Overlay) to UHI formula (Heat Stress Overlay)

2026-04-13T11:37:53Z

Frank@tygron.nl moved page UHI formula (Heat Overlay) to UHI formula (Heat Stress Overlay)

← Older revision	Revision as of 11:37, 13 April 2026
(No difference)

Rudolf@tygron.nl at 11:51, 25 February 2026

2026-02-25T11:51:28Z

← Older revision		Revision as of 11:51, 25 February 2026
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	\|page=		\|page=
	\|source=		\|source=
	\|link=~~http~~://~~www~~.~~meteo~~.wur.nl~~/medewerkers/steeneveld~~/Theeuwes_JOC_2016.pdf		\|link=https://gert-jan.steeneveld.wur.nl/Theeuwes_JOC_2016.pdf
	\|lastvisit=13-02-~~2020~~		\|lastvisit=2026-02-25
	}}		}}
	</references>		</references>
	}}		}}
	{{HeatOverlay_formula_nav}}		{{HeatOverlay_formula_nav}}

Rudolf@tygron.nl at 11:29, 25 February 2026

2026-02-25T11:29:16Z

← Older revision		Revision as of 11:29, 25 February 2026
Line 35:		Line 35:
	* <math>T_{station}</math> is the hourly [[Hourly_temperature_(Heat_Overlay)\|temperature]] measured at the station		* <math>T_{station}</math> is the hourly [[Hourly_temperature_(Heat_Overlay)\|temperature]] measured at the station
	* <math>\rho_{air}</math> is the calculated air density in kg/m<sup>3</sup>;		* <math>\rho_{air}</math> is the calculated air density in kg/m<sup>3</sup>;
	* <math>R_{specific}</math> is the [https://en.wikipedia.org/wiki/Specific_gas_constant\|specific gas constant] for dry air. We use a value of 287.058 J/(kg·K)		* <math>R_{specific}</math> is the [https://en.wikipedia.org/wiki/Specific_gas_constant specific gas constant] for dry air. We use a value of 287.058 J/(kg·K)
	* <math>273.15</math> converts the used temperature from celcius (°C) to kelvin (K)		* <math>273.15</math> converts the used temperature from celcius (°C) to kelvin (K)

Rudolf@tygron.nl at 10:00, 17 October 2025

2025-10-17T10:00:44Z

← Older revision		Revision as of 10:00, 17 October 2025
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	__NOTOC__		__NOTOC__
	The Urban heat island effect is calculated<ref ~~name='~~rmets~~'/>~~ using the following formula:~~<br>~~		The Urban heat island effect is calculated{{ref\|rmets}} using the following formula:

	<math>UHI_{max} = ( 2 - S_{vf} - F_{veg} ) \cdot \sqrt[4]{\frac{ S \cdot (T_{max}-T_{min})^3}{U}}</math>		<math>UHI_{max} = ( 2 - S_{vf} - F_{veg} ) \cdot \sqrt[4]{\frac{ S \cdot (T_{max}-T_{min})^3}{U}}</math>

	where:		where:
	* S<sub>vf</sub> is the calculated [[Sky_view_avg_result_type_(Heat_Overlay)\|average sky view factor]];		* S<sub>vf</sub> is the calculated [[Sky_view_avg_result_type_(Heat_Overlay)\|average sky view factor]];
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	* <math>273.15</math> converts the used temperature from celcius (°C) to kelvin (K)		* <math>273.15</math> converts the used temperature from celcius (°C) to kelvin (K)

	~~==See also=~~=		{{article end
			\|seealso=
	* [[Temperature_formulas_(Heat_Overlay)#Atmospheric Temperature formula\|Atmospheric temperature formula]]		* [[Temperature_formulas_(Heat_Overlay)#Atmospheric Temperature formula\|Atmospheric temperature formula]]
	~~{{Template:HeatOverlay_formula_nav}}~~		\|references=

	~~==References=~~=
	<references>		<references>
	<ref name=~~'rmets'>~~A diagnostic equation for the daily maximum urban heat island effect for cities in northwestern Europe • N.E. Theeuwes et al. • http://www.meteo.wur.nl/medewerkers/steeneveld/Theeuwes_JOC_2016.pdf ~~• last visited~~ 13-02-2020~~</ref>~~		{{ref\|rmets
			\|name=A diagnostic equation for the daily maximum urban heat island effect for cities in northwestern Europe
			\|author=N.E. Theeuwes et al.
			\|page=
			\|source=
			\|link=http://www.meteo.wur.nl/medewerkers/steeneveld/Theeuwes_JOC_2016.pdf
			\|lastvisit=13-02-2020
			}}
	</references>		</references>
			}}
			{{HeatOverlay_formula_nav}}

Frank@tygron.nl: /* References */

2021-09-13T11:53:36Z

References

← Older revision		Revision as of 11:53, 13 September 2021
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	<ref name='rmets'>A diagnostic equation for the daily maximum urban heat island effect for cities in northwestern Europe • N.E. Theeuwes et al. • http://www.meteo.wur.nl/medewerkers/steeneveld/Theeuwes_JOC_2016.pdf • last visited 13-02-2020</ref>		<ref name='rmets'>A diagnostic equation for the daily maximum urban heat island effect for cities in northwestern Europe • N.E. Theeuwes et al. • http://www.meteo.wur.nl/medewerkers/steeneveld/Theeuwes_JOC_2016.pdf • last visited 13-02-2020</ref>
	</references>		</references>

	~~{{Template:Heat_Module_buttons}}~~

Rudolf@tygron.nl at 15:24, 13 February 2020

2020-02-13T15:24:00Z

← Older revision		Revision as of 15:24, 13 February 2020
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	__NOTOC__		__NOTOC__
	The Urban heat island effect is calculated using the following formula:<br>		The Urban heat island effect is calculated<ref name='rmets'/> using the following formula:<br>
	<math>UHI_{max} = ( 2 - S_{vf} - F_{veg} ) \cdot \sqrt[4]{\frac{ S \cdot (T_{max}-T_{min})^3}{U}}</math>		<math>UHI_{max} = ( 2 - S_{vf} - F_{veg} ) \cdot \sqrt[4]{\frac{ S \cdot (T_{max}-T_{min})^3}{U}}</math>
	where:		where:
Line 39:		Line 39:
	* [[Temperature_formulas_(Heat_Overlay)#Atmospheric Temperature formula\|Atmospheric temperature formula]]		* [[Temperature_formulas_(Heat_Overlay)#Atmospheric Temperature formula\|Atmospheric temperature formula]]
	{{Template:HeatOverlay_formula_nav}}		{{Template:HeatOverlay_formula_nav}}

			==References==
			<references>
			<ref name='rmets'>A diagnostic equation for the daily maximum urban heat island effect for cities in northwestern Europe • N.E. Theeuwes et al. • http://www.meteo.wur.nl/medewerkers/steeneveld/Theeuwes_JOC_2016.pdf • last visited 13-02-2020</ref>
			</references>

	{{Template:Heat_Module_buttons}}		{{Template:Heat_Module_buttons}}

Rudolf@tygron.nl: /* Daily average global radiation */

2020-02-13T15:17:44Z

Daily average global radiation

← Older revision		Revision as of 15:17, 13 February 2020
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	* <math>\rho_{air}</math> is the calculated air density in kg/m<sup>3</sup>;		* <math>\rho_{air}</math> is the calculated air density in kg/m<sup>3</sup>;
	* <math>R_{specific}</math> is the [https://en.wikipedia.org/wiki/Specific_gas_constant\|specific gas constant] for dry air. We use a value of 287.058 J/(kg·K)		* <math>R_{specific}</math> is the [https://en.wikipedia.org/wiki/Specific_gas_constant\|specific gas constant] for dry air. We use a value of 287.058 J/(kg·K)
			* <math>273.15</math> converts the used temperature from celcius (°C) to kelvin (K)

	==See also==		==See also==

Bobby@tygron.nl at 10:50, 17 December 2019

2019-12-17T10:50:03Z

← Older revision		Revision as of 10:50, 17 December 2019
Line 38:		Line 38:
	* [[Temperature_formulas_(Heat_Overlay)#Atmospheric Temperature formula\|Atmospheric temperature formula]]		* [[Temperature_formulas_(Heat_Overlay)#Atmospheric Temperature formula\|Atmospheric temperature formula]]
	{{Template:HeatOverlay_formula_nav}}		{{Template:HeatOverlay_formula_nav}}

			{{Template:Heat_Module_buttons}}

← Older revision		Revision as of 11:41, 13 April 2026
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	where:		where:
	* S<sub>vf</sub> is the calculated [[Sky_view_avg_result_type_(~~Heat_Overlay~~)\|average sky view factor]];		* S<sub>vf</sub> is the calculated [[Sky_view_avg_result_type_(Heat Stress Overlay)\|average sky view factor]];
	* F<sub>veg</sub> is the calculated [[Vegetation_avg_result_type_(~~Heat_Overlay~~)\|average vegetation fraction]];		* F<sub>veg</sub> is the calculated [[Vegetation_avg_result_type_(Heat Stress Overlay)\|average vegetation fraction]];
	* S is the calculated [[#Daily average global radiation\|daily average global radiation]] in K m/s		* S is the calculated [[#Daily average global radiation\|daily average global radiation]] in K m/s
	* T<sub>max</sub> is the [[Daily_temperature_max_(~~Heat_Overlay~~)\|maximum temperature]] measured at a weather station between 8 AM and 7 AM the next day.		* T<sub>max</sub> is the [[Daily_temperature_max_(Heat Stress Overlay)\|maximum temperature]] measured at a weather station between 8 AM and 7 AM the next day.
	* T<sub>min</sub> is the [[Daily_temperature_min_(~~Heat_Overlay~~)\|minimum temperature]] measured at a weather station between 8 AM and 7 AM the next day.		* T<sub>min</sub> is the [[Daily_temperature_min_(Heat Stress Overlay)\|minimum temperature]] measured at a weather station between 8 AM and 7 AM the next day.
	* U is the [[Daily_avg_wind_speed_(~~Heat_Overlay~~)\|daily average wind speed]] measured at 10 meters above ground at a weather station.		* U is the [[Daily_avg_wind_speed_(Heat Stress Overlay)\|daily average wind speed]] measured at 10 meters above ground at a weather station.

	==Formula Decomposition==		==Formula Decomposition==