Source here. The official 2009 U.S. temperature was 53.13°F. The official 1900 U.S. temperature was 53.53°F. This is not the global warming Jim Hansen, Al Gore and the devoted had in mind when they claimed that the billions of tons of CO2 humans were pouring into the atmosphere would turn the world into an oven.
Why were they so wrong? Well, probably because human CO2 emissions really don't have that large of an impact on temperatures. During 2009, multiple studies were released indicating that other climate forcings, such as solar, cosmic ray, land-use, black soot (aerosols) and clouds, do have a major impact on global temperatures. These forcings combined would represent an impact multiple times greater than CO2. For the devoted, the sad news has become ever more obvious: CO2 is a bit player regarding temperatures. For plants though, it's the cat's pajamas. (click on image to enlarge)
The graph reveals an overall temperature trend of 1.18°F per century, which will decline as the existing cooling period lengthens. The prior warming and cooling periods are indicated by the dashed boxes. The red dashed line at the top represents the latest 100 year temperature predictions being churned out by climate models (the predictions are predicated on human CO2 having a large impact, which it hasn't).
Additional current temp charts here
Historical temp charts here.
