I decided to look up “turner, english artist” and found a bunch of his paintings with dates on them. It appears that the brightest skies he painted were between 1835 and 1845, so I will have to check to see if there was significant volcanic activity in those years, especially Iceland which would be more likely to affect English skies. Cheers and happy Thanksgiving.
Thanks, and a Happy Thanksgiving to you as well. I may eat out that day. One of the volcanic skies claims about Turner is that there were three big eruptions during his career, if that helps.