Their first graph shows the difference of 1997 — 1970 spectral results converted from W / m2 into Brightness Temperature (the equivalent blackbody radiation temperature). (scienceofdoom.com)
A giant void where little matter or dark energy is present, like the WMAP Cold Spot, causes significant drops in radiation temperature. (science.howstuffworks.com)
An irradiated object can never reach a higher temperature than the source causing the radiation (scienceofdoom.com)