Are the colors of a sunset dependent on the tempature? What makes the colors of the sunset?
The colors of the sunset are not dependent on temperature,
except in the case of a low enough temperature to produce
fog or an enhanced haze (higher humidity combined with air
pollution). The colors are a consequence of preferential
scattering of different wavelengths of sunlight by the
particles and water vapor in the air. A large amount of
particles tend to scatter out blue light, giving us a pink
to red sunset. The red sunset can be washed out to whitish
by heavy haze or high relative humidity, which will scatter
all wavelengths more equally; however, the sun itself will
still appear to be reddish-orange. When there is very dry,
clean air, such as with an Arctic high pressure system, the
sky near the horizon will stay nearly blue, with the sun
being brilliant orange.
meteorologist at Argonne Nat. Lab.
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Update: June 2012