from slashdot.org:

"An article in the Proceedings of the National Academy of Sciences reports that daily temperature ranges are smaller on weekdays than on weekends. This phenomenon is strongest in the US, but also appears in China and Japan. The researchers attribute this to human activity, although the exact mechanism is unclear. The prime suspect is aerosol / cloud interactions. Here is the more legible version from Scientific American"

scientific america:

http://www.sciam.com/article.cfm?art...5980A84189EEDF

areosol cans:
http://saga.pmel.noaa.gov/aceasia/pr...tus022601.html

 

It's probably just because I use so much CRC Brakleen. They really should start sending me a Christmas card.