According to NOAA the rate of global warming from 1880 to 2018 was only 0.70 degrees Celsius per century and would have been less had they not increased all the recorded temperatures from 2001 to 2013. Even with the changes to their temperature data, it was nowhere near the 1.36 degrees Celsius per century rate of warming in the period between 1910-1945, almost twice the overall warming rate.
The anomalies, above/below 13.90 C, the average twentieth century global temperature over land and ocean, in NOAA Climate Reports from 2001 to 2013 were increased from an average of 55.4 C to 61.7 C. In the same period, from 2001 to 2013, the UK Met Office had recorded an average anomaly of 48.61 C.
Anomalies appear to have been changed towards the end of the decade, some by as much as 0.08 C, when their list of hottest years summaries were published in the lead up to the Paris Conference in 2015. You have to question why there were no alterations to their data sets in past years if their methodology was flawed and not just those that had indicated there was no significant warming trend for 17-18 years.
the UK Met Office, whose recorded anomalies for the period between 2001-2013 showed an average of 48.60 C, had refused to budge on changing any of its data which had confirmed there was no warming trend in period leading up to the Paris conference after all. With the Paris conference looming there were several theories to explain the missing heat one was that the planet was still warming and the heat had simply gone into the lower depths of the ocean, to the rescue came NOAA’s senior officer Thomas Karl who announced there was an update of the agencies climate data set which now shows a perfectly consistent warming trend over the period.
Whitney Webb of Environmental News wrote: Potentially explosive allegations have surfaced casting doubt on the validity of critical climate change data published by NOAA (National Oceanic and Atmospheric Administration) that subsequently influenced multi-billion dollar decisions made by world leaders at the 2015 Paris Climate Conference.
John Bates, former NOAA Meteorology Principal Scientist and winner of the US Department of Commerce Gold Medal in 2014 for his work in preservation of climate data records, published a bombshell post titled Climate Scientists Versus Climate Data, on the climate change blog Climate Etc., lampooning the seminal climate change work of former director of the National Centers for Environmental Information (NCEI) Tom Karl.
Bates claims to have extensive documentation proving that Karl made, ”decisions that maximize warming and minimize documentation. “ The report in question was published by the journal Science on Jun 4, 2015, just five months before the 2105 United Nations Climate Change Conference. The Karl report directly refuted the somewhat inconvenient 2013 UN IPCC (United Nations Intergovernmental Panel on Climate Change) report also known as the Fifth Assessment Report, which concluded that rate of global warming decreased from 1998-2012 when compared to the global warming trend from 1951-2012. The phenomenon was dubbed the “global warming hiatus”.
NOAA was quick to applaud the study on its website stating of the Karl paper shortly after it was published, “A new study published online today in the journal Science finds that the rate of global warming during the last 15 years has been as fast as or faster than that seen during the latter half of the 20th Century. The study refutes the notion that there has been a slowdown or “hiatus” in the rate of global warming in recent years.”The report’s ultimate validation, however, was its influence on the 2015 UN Climate Change Conference. In his blog post Dr. Bates writes, “Gradually, in the months after K15 [Tom Karl’s paper] came out, the evidence kept mounting that Tom Karl constantly had his ‘thumb on the scale’—in the documentation, scientific choices, and release of datasets—in an effort to discredit the notion of a global warming hiatus and rush to time the publication of the paper to influence national and international deliberations on climate policy.” Indeed, world leaders have pledged hundreds of billions of dollars to support climate change research.
It bears mentioning that despite the unexpected results of the Fifth Assessment Report, the overall conclusion of scientists at that time remained dire stating that, “Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia.” They also stated that,” Human influence on the climate system is clear. This is evident from the increasing greenhouse gas concentrations in the atmosphere, positive radiative forcing, observed warming, and understanding of the climate system.” In effect, apart from the assertions of the Karl paper, the larger facts surrounding climate change remain the same according to the mainstream scientific consensus.
The conclusions drawn by Bates included recommendations for beefing up legislation regarding the archiving of federal climate data sets (the issue at the heart of Karl’s alleged malfeasance), enforcement of such legislation and, “a renewed effort by scientists and scientific societies to provide training and conduct more meetings on ethics.”
The wider significance of these allegations, however, cannot be understated given the current political climate. Climate scientists and policy makers fear the current administration’s efforts to undermine federal and international efforts addressing climate change could have long standing detrimental environmental effects. The Trump administration’s position on climate change have been made clear through their actions during Trump’s first week in office. For example, the EPA was ordered to remove its page on climate change. (The order has since been suspended.) Trump has openly tweeted his belief that climate change is a hoax stating, “The concept of global warming was create by and for the Chinese in order to make US manufacturing non-competitive.” It remains to be seen how the Bates allegations will affect the heated public debate. As of the writing of this article, Trump has not tweeted or publicly stated anything regarding this latest development on the climate change debate.