Happer on NYT: The article ends with the silly claim that the “six warmest years on record occurred after 2010.” The alleged record warmings are tenths of a degree or less, comparable to the statistical error. Thermometers have only existed for a few centuries and there are still no reliable networks of thermometers to measure global surface temperatures, although satellite measurements do provide a pretty good global average for the lower atmosphere since the year 1979. There is excellent proxy evidence that Earth’s temperature was warmer than today on several occasions since the end of the last ice age, about 12,000 years ago.
"The 'average' world temperature for June 2018 was +0.21 deg C above the 1981 – 2010 mean. That represented a decline of about 0.65 deg C from the all-time high of this 39-year record, which was reached in early 2016. The 0.65 deg C decline represented more than 75% of the amount by which the average temperature had exceeded the 1981 – 2010 mean at the highest point. Suddenly the fact that some large number of “all-time highs” was being set at the end of June does not seem very significant."