by James Delingpole, Breitbart: Much of recent global warming has been fabricated by climate scientists to make it look more frightening, a study has found. The peer-reviewed study by two scientists and a veteran statistician looked at the global average temperature datasets (GAST) which are used by climate alarmists to argue that recent years have been “the hottest evah” and that the warming of the last 120 years has been dramatic and unprecedented.
What they found is that these readings are “totally inconsistent with published and credible U.S. and other temperature data.”
That is, the adjusted data used by alarmist organizations like NASA, NOAA, and the UK Met Office differs so markedly from the original raw data that it cannot be trusted.
This chart gives you a good idea of the direction of the adjustments.
The blue bars show where the raw temperature data has been adjusted downwards to make it cooler; the red bars show where the raw temperature data has been adjusted upwards to make it warmer.
Note how most of the downward adjustments take place in the early twentieth century and most of the upward take place in the late twentieth century.
According to meteorologist Joe D’Aleo, who co-authored the study with statistician James Wallace and Cato Institute climate scientist Craig Idso, this has the effect of exaggerating the warming trend:
“Nearly all of the warming they are now showing are in the adjustments.”
“Each dataset pushed down the 1940s warming and pushed up the current warming.”
“You would think that when you make adjustments you’d sometimes get warming and sometimes get cooling. That’s almost never happened.”
What this means, the report concludes, is that claims by NASA, NOAA, and the UK Met Office that the world is experiencing unprecedented and dramatic warming should be taken with a huge pinch of salt: they all use the same corrupted global average temperature (GAST) data.
The conclusive findings of this research are that the three GAST data sets are not a valid representation of reality. In fact, the magnitude of their historical data adjustments, that removed their cyclical temperature patterns, are totally inconsistent with published and credible U.S. and other temperature data. Thus, it is impossible to conclude from the three published GAST data sets that recent years have been the warmest ever – despite current claims of record setting warming.