The World Meteorology Organisation (WMO), the agent of the UN, intervened in 1998 to unify world temperature data sets. This came after the National Oceanic and Atmospheric Administration, led by Tom Karl, had posted a global temperature of 62.45 degrees Fahrenheit (16.91 degrees Celsius) in the previous year. NOAA in its explanation for the higher reading in 1997, failed to mention it had been using the same method of measuring for 97 years, since 1900, when it recorded a global temperature of 61.50 F (16.38 C). NOAA were then asked to peg their 1997 temperature back to 14.42 C, just below WMO at 14.44 C. From then on all the world data sets were kept within tenths of a degree of each other. The fact that the global temperatures below were later reduced by more than two degrees Celsius would suggest that there was never any record of global temperatures up to 1997 and the archived temperature data sets published today were simply made up. The WMO baseline reference (1961-1990) was 14.00 C (57.20 F) WMO 1997
According to the data presented by Mr. Karl, combined land and ocean temperatures last year averaged three-quarters of a degree Fahrenheit above normal, the mean temperature for the years from 1961 to 1990. The temperatures exceeded the record, set in 1990, by fifteen-hundredths of a degree. The actual average surface temperature last year (1997) was a little more than 62 degrees Fahrenheit, said the report by the National Climatic Data Center. NYT
The other, maintained by the NASA Goddard Institute for Space Studies in New York, shows the average 1995 temperature at 59.7 degrees F, (15.38 C) slightly ahead of 1990 as the warmest year since record-keeping began in 1866. But the difference is within the margin of sampling error, and the two years essentially finished neck and neck. NYT
NOAA in 1995 recorded a temperature of 62.30 F (16.83 C), almost 1.5 C warmer than that recorded by NASA. NOAA’s own graphs showed temperatures of approximately 62.00 F+ for 1991 and a temperature of 62.45 F for 1997. The graph above appears to show that NOAA had used a higher baseline temperature (61.70 F) for the period between 1900-1997
As early as February 4, 1988: The British readings showed that the average global temperature in 1988 was 0.612 degrees Fahrenheit higher than the long-term average for the period 1950 through 1979, which is a base for comparing global temperatures. Average worldwide temperature for that 30-year period is roughly 59 degrees (15.0 C) Fahrenheit, the British researchers said. The 1988 average temperature was 0.018 degrees higher than the average for 1987, the previous high year. Therefore the global temperature in 1988 was 59.62 F (15.344 C) and 1987 59.62 F (15.334 C) at 0.18 F less than 1988. NYT
NOAA recorded a temperature of 62.30 F/(16.83 C) in 1995 and 62.45 F/(16.91 C) in 1997 this was two degrees C warmer than recorded by NOAA in their most recent report in 2019 at 58.73 F/(14.85 C).
Prior to this temperature measuring authorities such as the British Meteorology office and NASA were similarly at odds: NASA Goddard Institute for Space Studies in New York, showed the average 1995 temperature at 59.7 F, (15.38 C) slightly ahead of 1990 as the warmest year since record-keeping began in 1866″. “But the difference is within the margin of sampling error, and the two years essentially finished neck and neck”. “Both the 1995 record high temperature and the strikingly warm half-decade of the early 1990’s are “consistent with the sort of expectation we have of the interplay between natural and man made influences,” said Dr. Tom M. L. Wigley of the National Center for Atmospheric Research in Boulder, Colo. Dr. Wigley was a member of a subcommittee of the United Nations panel that dealt specifically with detecting a human role in climate change”.
It is patently obvious that the long term temperature data sets of today must have been configured after these reports were published. It was the UN who changed the NOAA temperature data reducing temperature from 16.91 C in 1997 to 14.44 C in 1998.
A change of temperature was often masked by the publication of an anomaly in reference to a baseline period, which is not always revealed, rather than stating what actual temperature was. We may never know how much the world is actually warming and the use of modeling has not worked. The role of the UN appears to have changed from peace keeper and provider of aid.