A study published June 27 by two scientists and a veteran statistician. The peer-reviewed study tried to validate current surface temperature datasets managed by NASA, NOAA and the UK’s Met Office, all of which make adjustments to raw thermometer readings. Skeptics of man-made global warming have criticized the adjustments. Climate scientists often apply adjustments to surface temperature thermometers to account for “biases” in the data. The new study doesn’t question the adjustments themselves but notes nearly all of them increase the warming trend. Basically, “cyclical pattern in the earlier reported data has very nearly been ‘adjusted’ out” of temperature readings taken from weather stations, buoys, ships and other sources. In fact, almost all the surface temperature warming adjustments cool past temperatures and warm more current records, increasing the warming trend, according to the study’s authors.
The China Meteorological Administration (CMA) has recently developed a new global monthly land-surface air temperature data set called CMA GLSAT. Using it researchers from the administration reanalysed the change in global annual mean land-surface air temperature during three time periods (1901–2014, 1979–2014 and 1998–2014) to see if there was any evidence of a hiatus or pause in recent surface global warming.The researchers find very clear evidence for the recent warming hiatus...Their results show linear trends of 0.104 °C per decade, 0.247 °C per decade and 0.098 °C per decade for the three periods, respectively. The trends were statistically significant except for the period 1998–2014, the period that is also known as the ‘‘warming hiatus”.
So to the 2016 erasure attempt: by Carl Mears, proprietor of RSS, one of the satellite records. As he himself admits, he has been mightily irritated by people accusing his temperature record of supporting the climate skeptics. He has in fact been expressing irritation with that for quite some years. He has declared several times that he still supports Warmism despite what his own data show. So he finally devised a solution to his embarrassment. He "adjusted" his data. He said his old data had errors in it and he has now corrected the errors, to show some warming -- a warming of 18 hundredths of one degree over nearly 20 years, no less! One hundredth of a degree per annum! If there had been errors in it, one wonders why he rode with the "erroneous" data for so long but let that be by the by.