Global warming potential: Difference between revisions
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[[category:climate change]] | [[category:climate change]] | ||
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<onlyinclude>'''Global warming potential''' | <onlyinclude>'''Global warming potential''' (GWP) measures how much heat a [[greenhouse gas]] (GHG) traps in the atmosphere. All the GHGs measured are relative to CO<sub>2</sub>, which has a value of 1. </onlyinclude> The higher the GWP, the more heat a gas traps, therefore, the higher the GWP the more harm it has on the climate. | ||
The chart below does not take into account the complicated factors involved on how long a gas stays in the atmosphere. | The chart below does not take into account the complicated factors involved on how long a gas stays in the atmosphere. For example, CO<sub>2</sub> has a much longer residence time than methane, decreasing the gap between them of how much heat they will trap in their respective lifetimes. | ||
==Common GWP values<ref>http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch2s2-10-2.html</ref><ref> | ==Common GWP values<ref>"2.10.2 Direct Global Warming Potentials - AR4 WGI Chapter 2: Changes in Atmospheric Constituents and in Radiative Forcing", Ipcc.ch, 2018. [Online]. Available: http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch2s2-10-2.html. [Accessed: 13- Jul- 2018].</ref><ref>"Ozone Layer Protection | US EPA", US EPA, 2018. [Online]. Available: https://www.epa.gov/ozone-layer-protection. [Accessed: 13- Jul- 2018].</ref>== | ||
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| [[NOx|Nitrous oxide]] || N<sub>2</sub>O || 114 || 310 | | [[NOx|Nitrous oxide]] || N<sub>2</sub>O || 114 || 310 | ||
|- | |- | ||
| [[Ammonia]] | | [[Ammonia]] || NH<sub>3</sub> || <2 hours || 0 | ||
|- | |- | ||
| Nitrogen trifluoride || NF<sub>3</sub> || 740 || 10,970 | | Nitrogen trifluoride || NF<sub>3</sub> || 740 || 10,970 | ||
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<nowiki>*</nowiki>Calculating the atmospheric lifetime of CO<sub>2</sub> is extremely complex. If you'd like to learn about it, click [http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch2s2-10-2.html| here]. | <nowiki>*</nowiki>Calculating the atmospheric lifetime of CO<sub>2</sub> is extremely complex. If you'd like to learn about it, click [http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch2s2-10-2.html| here]. | ||
==For Further Reading== | |||
*[[Greenhouse gas]] | |||
*[[Greenhouse gas emission]] | |||
*[[Greenhouse effect]] | |||
*[[Global warming]] | |||
*Or explore a [[Special:Random|random page]] | |||
==References== | ==References== | ||
{{reflist}} | {{reflist}} | ||
[[Category:Uploaded]] | [[Category:Uploaded]] | ||
Revision as of 20:32, 17 July 2018
Global warming potential (GWP) measures how much heat a greenhouse gas (GHG) traps in the atmosphere. All the GHGs measured are relative to CO2, which has a value of 1. The higher the GWP, the more heat a gas traps, therefore, the higher the GWP the more harm it has on the climate.
The chart below does not take into account the complicated factors involved on how long a gas stays in the atmosphere. For example, CO2 has a much longer residence time than methane, decreasing the gap between them of how much heat they will trap in their respective lifetimes.
Common GWP values[1][2]
| Gas | Chemical formula | Atmospheric lifetime (years) | GWP value |
|---|---|---|---|
| Carbon dioxide | CO2 | -* | 1 |
| Methane | CH4 | 12 | 21 |
| Nitrous oxide | N2O | 114 | 310 |
| Ammonia | NH3 | <2 hours | 0 |
| Nitrogen trifluoride | NF3 | 740 | 10,970 |
*Calculating the atmospheric lifetime of CO2 is extremely complex. If you'd like to learn about it, click here.
For Further Reading
References
- ↑ "2.10.2 Direct Global Warming Potentials - AR4 WGI Chapter 2: Changes in Atmospheric Constituents and in Radiative Forcing", Ipcc.ch, 2018. [Online]. Available: http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch2s2-10-2.html. [Accessed: 13- Jul- 2018].
- ↑ "Ozone Layer Protection | US EPA", US EPA, 2018. [Online]. Available: https://www.epa.gov/ozone-layer-protection. [Accessed: 13- Jul- 2018].