Earth Temperature without GHGs - Revision history

Jmdonev: 1 revision imported

2026-08-04T20:43:59Z

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energy>Jmdonev at 20:29, 4 August 2026

2026-08-04T20:29:59Z

← Older revision		Revision as of 20:29, 4 August 2026
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	[[Category:~~Maddy edit~~]]		[[Category:Done 2026-08-01]]
	<onlyinclude>The [[temperature of the Earth]], as well as the [[greenhouse effect on other planets\|temperature of other planets]], depends strongly on the composition of the [[atmosphere]] ~~and~~ how significant the effects of the [[greenhouse effect]] are.		<onlyinclude>The [[temperature of the Earth]], as well as the [[greenhouse effect on other planets\|temperature of other planets]], depends strongly on the composition of the [[atmosphere]], particularly how significant the effects of the [[greenhouse effect]] are.

	On Earth, the [[temperature]] is kept at a comfortable level since the atmosphere traps some of the [[radiant heat]] from the Sun, warming the surface and sustaining life. This trapping is done by greenhouse gases in our atmosphere, which absorbs some infrared heat radiation and ~~reradiates~~ some to the surface of the Earth to warm it.</onlyinclude><ref name="RE1">NASA's Cosmos. (May 7, 2015). ''Heating by the Greenhouse Effect'' [Online]. Available: http://ase.tufts.edu/cosmos/view_chapter.asp?id=21&page=1</ref> The warming influence on the Earth is crucial to the existence of life on Earth. Without the influence of the greenhouse effect on our planet, the average surface temperature would be 255 [[Kelvin]] - which can also be expressed as [[Celsius\|-18°C]] or [[Fahrenheit\|0°F]].<ref name="RE1"/> If this were the case, [[water]] on Earth would freeze and life as we know it would not exist. This is a significant temperature drop in comparison to the approximately 15°C average temperature on the Earth with the greenhouse effect.<ref>The Encyclopedia of Earth. (May 7, 2015). ''Greenhouse Effect'' [Online]. Available: http://www.eoearth.org/view/article/153146/</ref>		On Earth, the [[temperature]] is kept at a comfortable level since the atmosphere traps some of the [[radiant heat]] from the Sun, warming the surface and sustaining life. This trapping is done by greenhouse gases in our atmosphere, which absorbs some infrared heat radiation and re-radiates some to the surface of the Earth to warm it.</onlyinclude><ref name="RE1">NASA's Cosmos. (May 7, 2015). ''Heating by the Greenhouse Effect'' [Online]. Available: http://ase.tufts.edu/cosmos/view_chapter.asp?id=21&page=1</ref> The warming influence on the Earth is crucial to the existence of life on Earth. Without the influence of the greenhouse effect on our planet, the average surface temperature would be 255 [[Kelvin]] - which can also be expressed as [[Celsius\|-18°C]] or [[Fahrenheit\|0°F]].<ref name="RE1"/> If this were the case, [[water]] on Earth would freeze and life as we know it would not exist. This is a significant temperature drop in comparison to the approximately 15°C average temperature on the Earth with the greenhouse effect.<ref>The Encyclopedia of Earth. (May 7, 2015). ''Greenhouse Effect'' [Online]. Available: http://www.eoearth.org/view/article/153146/</ref>

	The temperature for the Earth if the greenhouse effect is not taken into account can be derived from the expression called the [[Stefan-Boltzmann law]]. By accounting for the surface area of the Earth and the [[power]] from the Sun reaching the Earth, the equation is as follows:<ref name="wolfson">R. Wolfson. (May 7, 2015). Environment and Climate, 2nd ed. New York, U.S.A. Norton, 2012, pp. 320-322</ref>		The temperature for the Earth if the greenhouse effect is not taken into account can be derived from the expression called the [[Stefan-Boltzmann law]]. By accounting for the surface area of the Earth and the [[power]] from the Sun reaching the Earth, the equation is as follows:<ref name="wolfson">R. Wolfson. (May 7, 2015). Environment and Climate, 2nd ed. New York, U.S.A. Norton, 2012, pp. 320-322</ref>

Jmdonev at 20:25, 10 July 2023

2023-07-10T20:25:31Z

← Older revision		Revision as of 20:25, 10 July 2023
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	[[Category:~~Done 2018-05-18~~]]		[[Category:Maddy edit]]
	<onlyinclude>The [[temperature of the Earth]], as well as the [[greenhouse effect on other planets\|temperature of other planets]], depends strongly on the composition of the [[atmosphere]] and how significant the effects of the [[greenhouse effect]] are.		<onlyinclude>The [[temperature of the Earth]], as well as the [[greenhouse effect on other planets\|temperature of other planets]], depends strongly on the composition of the [[atmosphere]] and how significant the effects of the [[greenhouse effect]] are.

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	<center><math> T = (4.22 \times 10^9 K^4)^{1/4} = 255 K= -18</math>°C</center>		<center><math> T = (4.22 \times 10^9 K^4)^{1/4} = 255 K= -18</math>°C</center>

			==Phet Simulation==
			The [http://phet.colorado.edu/ University of Colorado] has graciously allowed us to use the following Phet simulation. Explore this simulation to see how light and greenhouse gasses play into determining the temperature of the Earth.

			<html>
			<iframe src="https://phet.colorado.edu/sims/html/greenhouse-effect/latest/greenhouse-effect_all.html" width="800" height="600" scrolling="no" allowfullscreen></iframe>
			</html>

	== For Further Reading ==		== For Further Reading ==

Jmdonev at 02:12, 31 March 2019

2019-03-31T02:12:39Z

← Older revision		Revision as of 02:12, 31 March 2019
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	Where:		Where:
	* <math>S</math> is the amount of sunlight that a square meter of Earth's surface absorbs on average. This takes the [[solar constant]], divides by four (to spread it evenly over both latitudes and the day/night cycle) and then accounts for 30% of light being reflected into space. Giving:<math>\frac{1364}{4} \frac{W}{m^2}\times 0.7=~~240~~\frac{W}{m^2}</math>		* <math>S</math> is the amount of sunlight that a square meter of Earth's surface absorbs on average. This takes the [[solar constant]], divides by four (to spread it evenly over both latitudes and the day/night cycle) and then accounts for 30% of [[albedo\|light being reflected into space]]. Giving:<math>\frac{1364}{4} \frac{W}{m^2}\times 0.7=238.7\frac{W}{m^2}</math>
	* <math>e</math> is the emissivity of an object, generally set to 1 for an ideal radiator		* <math>e</math> is the emissivity of an object, generally set to 1 for an ideal radiator
	* <math> \sigma </math> is the [[Stefan-Boltzmann constant]]		* <math> \sigma </math> is the [[Stefan-Boltzmann constant]]
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	<center><math> ~~1364~~ \frac{W}{m^2} = ~~4 (1)~~(5.67 \times 10^{-8} \frac{W}{m^2K^4}) T^4</math></center>		<center><math> 238.7 \frac{W}{m^2} = (5.67 \times 10^{-8} \frac{W}{m^2K^4}) T^4</math></center>

Jmdonev at 02:11, 31 March 2019

2019-03-31T02:11:09Z

← Older revision		Revision as of 02:11, 31 March 2019
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	The temperature for the Earth if the greenhouse effect is not taken into account can be derived from the expression called the [[Stefan-Boltzmann law]]. By accounting for the surface area of the Earth and the [[power]] from the Sun reaching the Earth, the equation is as follows:<ref name="wolfson">R. Wolfson. (May 7, 2015). Environment and Climate, 2nd ed. New York, U.S.A. Norton, 2012, pp. 320-322</ref>		The temperature for the Earth if the greenhouse effect is not taken into account can be derived from the expression called the [[Stefan-Boltzmann law]]. By accounting for the surface area of the Earth and the [[power]] from the Sun reaching the Earth, the equation is as follows:<ref name="wolfson">R. Wolfson. (May 7, 2015). Environment and Climate, 2nd ed. New York, U.S.A. Norton, 2012, pp. 320-322</ref>

	<center><math>S = 4 e \sigma T^4</math></center>		<center><math>S = e \sigma T^4</math></center>

	Where:		Where:
	* <math>S</math> is the [[solar constant]], ~~equal~~ to ~~approximately~~ <math>1364 \frac{W}{m^2}</math>		* <math>S</math> is the amount of sunlight that a square meter of Earth's surface absorbs on average. This takes the [[solar constant]], divides by four (to spread it evenly over both latitudes and the day/night cycle) and then accounts for 30% of light being reflected into space. Giving:<math>\frac{1364}{4} \frac{W}{m^2}\times 0.7=240\frac{W}{m^2}</math>
	* <math>e</math> is the emissivity of an object, generally set to 1 for an ideal radiator		* <math>e</math> is the emissivity of an object, generally set to 1 for an ideal radiator
	* <math> \sigma </math> is the [[Stefan-Boltzmann constant]]		* <math> \sigma </math> is the [[Stefan-Boltzmann constant]]

Jmdonev: 1 revision imported

2018-05-18T22:53:07Z

1 revision imported

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Jmdonev at 19:29, 11 May 2018

2018-05-11T19:29:41Z

← Older revision		Revision as of 19:29, 11 May 2018
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	[[Category:Done ~~2015~~-06-01]]		[[Category:Done 2018-05-18]]
	<onlyinclude>The [[temperature of the Earth]], as well as the [[greenhouse effect on other planets\|temperature of other planets]], depends strongly on the composition of the [[atmosphere]] and how significant the effects of the [[greenhouse effect]] are.		<onlyinclude>The [[temperature of the Earth]], as well as the [[greenhouse effect on other planets\|temperature of other planets]], depends strongly on the composition of the [[atmosphere]] and how significant the effects of the [[greenhouse effect]] are.

	On Earth, the [[temperature]] is kept at a comfortable level since the atmosphere traps some of the [[radiant heat]] from the Sun, warming the surface and sustaining life. This trapping is done by greenhouse gases in our atmosphere, which absorbs some infrared heat radiation and reradiates some to the surface of the Earth~~, warming~~ it.</onlyinclude><ref name="RE1">NASA's Cosmos. (May 7, 2015). ''Heating by the Greenhouse Effect'' [Online]. Available: http://ase.tufts.edu/cosmos/view_chapter.asp?id=21&page=1</ref> The warming influence on the Earth is crucial to the existence of life on Earth. Without the influence of the greenhouse effect on our planet, the average surface temperature would be 255 [[Kelvin]] - which can also be expressed as [[Celsius\|-18°C]] or [[Fahrenheit\|0°F]].<ref name="RE1"/> If this were the case, [[water]] on Earth would freeze and life as we know it would not exist. This is a significant temperature drop in comparison to the approximately 15°C average temperature on the Earth with the greenhouse effect.<ref>The Encyclopedia of Earth. (May 7, 2015). ''Greenhouse Effect'' [Online]. Available: http://www.eoearth.org/view/article/153146/</ref>		On Earth, the [[temperature]] is kept at a comfortable level since the atmosphere traps some of the [[radiant heat]] from the Sun, warming the surface and sustaining life. This trapping is done by greenhouse gases in our atmosphere, which absorbs some infrared heat radiation and reradiates some to the surface of the Earth to warm it.</onlyinclude><ref name="RE1">NASA's Cosmos. (May 7, 2015). ''Heating by the Greenhouse Effect'' [Online]. Available: http://ase.tufts.edu/cosmos/view_chapter.asp?id=21&page=1</ref> The warming influence on the Earth is crucial to the existence of life on Earth. Without the influence of the greenhouse effect on our planet, the average surface temperature would be 255 [[Kelvin]] - which can also be expressed as [[Celsius\|-18°C]] or [[Fahrenheit\|0°F]].<ref name="RE1"/> If this were the case, [[water]] on Earth would freeze and life as we know it would not exist. This is a significant temperature drop in comparison to the approximately 15°C average temperature on the Earth with the greenhouse effect.<ref>The Encyclopedia of Earth. (May 7, 2015). ''Greenhouse Effect'' [Online]. Available: http://www.eoearth.org/view/article/153146/</ref>

	The temperature for the Earth if the greenhouse effect is not taken into account can be derived ~~quickly~~ from an expression of the [[Stefan-Boltzmann law]]. By accounting for the surface area of the Earth and the [[power]] from the Sun reaching the Earth, the equation is:<ref name="wolfson">R. Wolfson. (May 7, 2015). Environment and Climate, 2nd ed. New York, U.S.A. Norton, 2012, pp. 320-322</ref>		The temperature for the Earth if the greenhouse effect is not taken into account can be derived from the expression called the [[Stefan-Boltzmann law]]. By accounting for the surface area of the Earth and the [[power]] from the Sun reaching the Earth, the equation is as follows:<ref name="wolfson">R. Wolfson. (May 7, 2015). Environment and Climate, 2nd ed. New York, U.S.A. Norton, 2012, pp. 320-322</ref>

	<center><m>S = 4 e \sigma T^4</m></center>		<center><math>S = 4 e \sigma T^4</math></center>

	Where:		Where:
	* <m>S</m> is the [[solar constant]], equal to approximately <m>1364 \frac{W}{m^2}</m>		* <math>S</math> is the [[solar constant]], equal to approximately <math>1364 \frac{W}{m^2}</math>
	* <m>e</m> is the emissivity of an object, generally set to 1 for an ideal radiator		* <math>e</math> is the emissivity of an object, generally set to 1 for an ideal radiator
	* <m> \sigma </m> is the [[Stefan-Boltzmann constant]]		* <math> \sigma </math> is the [[Stefan-Boltzmann constant]]
	* <m> T </m> is the temperature of the Earth, in Kelvin		* <math> T </math> is the temperature of the Earth, in Kelvin

	With accepted values in this equation, the theoretical average temperature of the Earth is:		With accepted values in this equation, the theoretical average temperature of the Earth is:


	<center><m> 1364 \frac{W}{m^2} = 4 (1)(5.67 \times 10^{-8} \frac{W}{m^2K^4}) T^4</m></center>		<center><math> 1364 \frac{W}{m^2} = 4 (1)(5.67 \times 10^{-8} \frac{W}{m^2K^4}) T^4</math></center>


	<center><m> T = (4.22 \times 10^9 K^4)^{1/4} = 255 K= -18</m>°C</center>		<center><math> T = (4.22 \times 10^9 K^4)^{1/4} = 255 K= -18</math>°C</center>

			== For Further Reading ==
			For further information please see the related pages below:

			*[[Greenhouse effect on other planets]]
			*[[Greenhouse gas]]
			*[[Climate change]]
			*[[Hydrocarbon combustion]]
			*[[Special:Random\|A random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:30:50Z

1 revision imported

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J.williams at 16:49, 12 August 2015

2015-08-12T16:49:15Z

New page

[[Category:Done 2015-06-01]]
<onlyinclude>The [[temperature of the Earth]], as well as the [[greenhouse effect on other planets|temperature of other planets]], depends strongly on the composition of the [[atmosphere]] and how significant the effects of the [[greenhouse effect]] are.

On Earth, the [[temperature]] is kept at a comfortable level since the atmosphere traps some of the [[radiant heat]] from the Sun, warming the surface and sustaining life. This trapping is done by greenhouse gases in our atmosphere, which absorbs some infrared heat radiation and reradiates some to the surface of the Earth, warming it.</onlyinclude><ref name="RE1">NASA's Cosmos. (May 7, 2015). ''Heating by the Greenhouse Effect'' [Online]. Available: http://ase.tufts.edu/cosmos/view_chapter.asp?id=21&page=1</ref> The warming influence on the Earth is crucial to the existence of life on Earth. Without the influence of the greenhouse effect on our planet, the average surface temperature would be 255 [[Kelvin]] - which can also be expressed as [[Celsius|-18°C]] or [[Fahrenheit|0°F]].<ref name="RE1"/> If this were the case, [[water]] on Earth would freeze and life as we know it would not exist. This is a significant temperature drop in comparison to the approximately 15°C average temperature on the Earth with the greenhouse effect.<ref>The Encyclopedia of Earth. (May 7, 2015). ''Greenhouse Effect'' [Online]. Available: http://www.eoearth.org/view/article/153146/</ref>

The temperature for the Earth if the greenhouse effect is not taken into account can be derived quickly from an expression of the [[Stefan-Boltzmann law]]. By accounting for the surface area of the Earth and the [[power]] from the Sun reaching the Earth, the equation is:<ref name="wolfson">R. Wolfson. (May 7, 2015). Environment and Climate, 2nd ed. New York, U.S.A. Norton, 2012, pp. 320-322</ref>

<center><m>S = 4 e \sigma T^4</m></center>

Where:
* <m>S</m> is the [[solar constant]], equal to approximately <m>1364 \frac{W}{m^2}</m>
* <m>e</m> is the emissivity of an object, generally set to 1 for an ideal radiator
* <m> \sigma </m> is the [[Stefan-Boltzmann constant]]
* <m> T </m> is the temperature of the Earth, in Kelvin

With accepted values in this equation, the theoretical average temperature of the Earth is:

<center><m> 1364 \frac{W}{m^2} = 4 (1)(5.67 \times 10^{-8} \frac{W}{m^2K^4}) T^4</m></center>

<center><m> T = (4.22 \times 10^9 K^4)^{1/4} = 255 K= -18</m>°C</center>
==References==
{{reflist}}
[[Category:Uploaded]]