Home Headline News Science After 20 Years, No New Global Temperature Record! by Roy W. Spencer, Ph. D.

After 20 Years, No New Global Temperature Record! by Roy W. Spencer, Ph. D.

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The article below by Cornwall Alliance Senior Fellow Dr. Roy W. Spencer, reprinted from his blog by permission, reports that the linear warming trend from 1970–2017 was 0.13 deg. C per decade. The computer climate models on which the UN Intergovernmental Panel on Climate Change, the UN Framework Convention on Climate Change, and the negotiators of the 2015 Paris climate agreement rely simulate a warming trend of 0.216 deg. C per decade, i.e., two-thirds faster than actually measured, and that assumes that all the warming is driven solely by added carbon dioxide, though it’s likely that most or all comes from other factors(solar, volcanic, and ocean current variabilities) instead. Observational data continue to show that the models grossly exaggerate CO2’s warming effect and therefore provide no sound basis for climate and energy policy.—ECB

2017 Third Warmest in the 39-Year Satellite Record

Global Satellite Monitoring of Temperature Enters its 40th Year

The Version 6.0 global average lower tropospheric temperature (LT) anomaly for December, 2017 was +0.41 deg. C, up a little from the November, 2017 value of +0.36 deg. C: (See graph above)

Global area-averaged lower tropospheric temperature anomalies (departures from 30-year calendar monthly means, 1981-2010). The 13-month centered average is meant to give an indication of the lower frequency variations in the data; the choice of 13 months is somewhat arbitrary… an odd number of months allows centered plotting on months with no time lag between the two plotted time series. The inclusion of two of the same calendar months on the ends of the 13 month averaging period causes no issues with interpretation because the seasonal temperature cycle has been removed as has the distinction between calendar months.

The global, hemispheric, and tropical LT anomalies from the 30-year (1981-2010) average for the last 24 months are:

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