Greenhouse effect: Difference between revisions
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The '''Greenhouse Effect''' (or "atmospheric effect") is a general attribute of planets and moons with atmospheres. It is an imbalance between surface radiation and top-of-atmosphere radiation due to the presence of [[greenhouse gas|greenhouse gases]]. | The '''Greenhouse Effect''' (or "atmospheric effect") is a general attribute of planets and moons with atmospheres. It is an imbalance between surface radiation and top-of-atmosphere radiation due to the presence of [[greenhouse gas|greenhouse gases]]. For example, in the case of the [[Earth]], the surface emits 390 W/m**2 (averaged over a year and the whole surface), but the emission at the top of the atmosphere is 235 W/m**2, giving a global-average greenhouse effect of 155 W/m**2<ref name="Tren96">Trenberth <i>et al</i>., 1996. in <i>Climate change 1995: The science of climate change</i>, Cambridge Univ. Press.</ref>. The top-of-atmosphere outgoing radiation balances the incoming 235 W/m**2 of solar radiation (342 W/m**2 incident minus 107 W/m**2 reflected). | ||
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== References == | |||
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Revision as of 22:39, 3 February 2007
The Greenhouse Effect (or "atmospheric effect") is a general attribute of planets and moons with atmospheres. It is an imbalance between surface radiation and top-of-atmosphere radiation due to the presence of greenhouse gases. For example, in the case of the Earth, the surface emits 390 W/m**2 (averaged over a year and the whole surface), but the emission at the top of the atmosphere is 235 W/m**2, giving a global-average greenhouse effect of 155 W/m**2[1]. The top-of-atmosphere outgoing radiation balances the incoming 235 W/m**2 of solar radiation (342 W/m**2 incident minus 107 W/m**2 reflected).
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References
- ↑ Trenberth et al., 1996. in Climate change 1995: The science of climate change, Cambridge Univ. Press.