As you might remember, there were a few days after 9/11 when all air traffic nationwide was grounded. Some scientists took it as a once-in-a-lifetime opportunity to examine what effect air traffic might have on climate.
Thanks for the link. I was well aware of that week. Michigan skies were exceptionally deep blue and cloud free - all week. I am also aware that NASA recorded an increase in the daily temperature range (details escape me). My question getting modded down to -4 is an amazing example of... something. People thinking climate is all about CO2? I dunno, but I'm gonna go follow that nature link. Thanks again.
Here's an article in Nature talking about it.
http://www.nature.com/news/2008/081231/full/news.2008.1335.h...