New research paper by a former UN IPCC lead author: 8000 years of ice core data were examined. From the abstract at the link below: “The average standard deviation of temperature was 0.98 ± 0.27 °C. This suggests that while some portion of the temperature change observed in the 20th century was probably caused by greenhouse gases, there is a strong likelihood that the major portion was due to natural variations.”
UN IPCC’s estimate of man-made warming plus natural warming is 0.85 degrees in total, an amount of warming which is less than the standard deviation 0.98 degrees for the last 8,000 years.
In other words, this amount of warming is not significant within the context of the Earth’s climate history.
An Estimate of The Centennial Variability of Global Temperatures
https://www.researchgate.net/publication/276276180_An_Estimate_of_The_Centennial_Variability_of_Global_Temperatures
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About budbromley
Bud is a retired life sciences executive. Bud's entrepreneurial leadership exceeded three decades. He was the senior business development, marketing and sales executive at four public corporations, each company a supplier of analytical and life sciences instrumentation, software, consumables and service. Prior to those positions, his 19 year career in Hewlett-Packard Company's Analytical Products Group included worldwide sales and marketing responsibility for Bioscience Products, Global Accounts and the International Olympic Committee, as well as international management assignments based in Japan and Latin America. Bud has visited and worked in more than 65 countries and lived and worked in 3 countries.
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