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Submission + - Famous paintings help study the Earth's past atmosphere

houghi writes: From European Geosciences Union:
A team of Greek and German researchers has shown that the colours of sunsets painted by famous artists can be used to estimate pollution levels in the Earth’s past atmosphere. In particular, the paintings reveal that ash and gas released during major volcanic eruptions scatter the different colours of sunlight, making sunsets appear more red.

The original paper can be found right here

Furthermore, in the last 150 years, the sunsets have become redder, likely refelecting increased manmade polution.
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Famous paintings help study the Earth's past atmosphere

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