JMW Turner's paintings are known for florid skies, which he may have seen in the years following the eruption of Mount Tambora in 1815, see: [link] [link] large amounts of volcanic ash up in the jetstream changed the weather and coloured the sky. following the recent eruptions of the unpronouncable Icelandic volcanos we can expect to see some interesting sunsets, plus cooler weather.
Oh okay, thank you for links and explanations, didn't know this painter !
About the ash, there's something strange, I've often heard it could make more colors, but the most colorfull sunsets and more particulary sunrises are seen during the coolest days of winter when the air is totally clean. You can even see pink light on the ground a few days per year in high mountains! Well I don't know much but I guess there is soo many factors that changes the colors that it must be hard to see some colors are due to a thhing precisely.