Iris hypothesis

The iris hypothesis is a partially-discredited theory that suggested increased water vapor Water vapor

Water vapor, also aqueous vapor, is the gas [i] phase of water [i]. ... 

 in the atmosphere Earth's atmosphere

Earth's atmosphere is a layer of gases surrounding the planet Earth [i] and retained by the Earth's gravity [i] ... 

 would result in reduced cirrus cloud Cirrus cloud

A cirrus cloud is a type of cloud [i] composed of ice crystals and characterized by thin, wisplike stran ... 

s and thus more visible-length radiation leakage from Earth's atmosphere. The fallacy was that more infrared Infrared

Infrared radiation is electromagnetic radiation [i] of a wavelength [i] longer than that of visible light [i] ... 

 radiation would be trapped, cancelling out the cooling from the visible-wavelength radiation leakage.

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The iris hypothesis is a partially-discredited theory that suggested increased water vapor Water vapor

Water vapor, also aqueous vapor, is the gas [i] phase of water [i]. ... 

 in the atmosphere Earth's atmosphere

Earth's atmosphere is a layer of gases surrounding the planet Earth [i] and retained by the Earth's gravity [i]... 

 would result in reduced cirrus cloud Cirrus cloud

A cirrus cloud is a type of cloud [i] composed of ice crystals and characterized by thin, wisplike stran ... 

s and thus more visible-length radiation leakage from Earth's atmosphere. The fallacy was that more infrared Infrared

Infrared radiation is electromagnetic radiation [i] of a wavelength [i] longer than that of visible light [i] ... 

 radiation would be trapped, cancelling out the cooling from the visible-wavelength radiation leakage.

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