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CH3041
ON-LINE LECTURE 27
• GREENHOUSE EFFECT: this is the heat trapping effect of
the atmosphere on the solar
radiation incident at Earths surface.
• 31% of the
incoming radiation is reflected.
Albedo reflectivity of the earth A = 0.31
Albedo reflectivity of the earth A = 0.31
• 69% heats the air
&
the Earths surface.
the Earths surface.
• The surface
re-radiates heat at long
wavelengths that are
absorbed by gases
such as CO2® heat
re-radiates heat at long
wavelengths that are
absorbed by gases
such as CO2® heat
