The actual measured temperature record shows something different: There have been hot years and hot decades since the turn of the last century, and colder years and colder decades. But the overall measured temperature shows no clear trend over the last century, at least not one that suggests runaway warming.
That is, until the NOAA’s statisticians “adjust” the data. Using complex statistical models, they change the data to reflect not reality, but their underlying theories of global warming. That’s clear from a simple fact of statistics: Data generate random errors, which cancel out over time. So by averaging data, the errors mostly disappear.
That’s not what NOAA does.
According to the NOAA, the errors aren’t random. They’re systematic. As we noted, all of their temperature adjustments lean cooler in the distant past, and warmer in the more recent past. But they’re very fuzzy about why this should be.
Far from legitimately “adjusting” anything, it appears they are cooking the data to show a politically correct trend toward global warming. Not by coincidence, that has been part and parcel of the government’s underlying policies for the better part of two decades.
What NOAA does aren’t niggling little changes, either.