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geordief

Water vapour as a greenhouse gas

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Are water vapour levels  broadly stable in the atmosphere? Is there any potential for them to rise with increases in global temperatures  and impart a feedback effect to any ongoing warming.

 

If so ,what timescales might we be talking about?

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Basically the water capacity of the atmosphere is temperature dependent. At higher temperature the water vapour rises. As water vapour is a greenhouse gas itself it can lead to feedback effects. 

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