CEERT Reports

Global Warming Data, Trend and Forecast

Dr. Rich Ferguson, CEERT
Updated June, 2019

Update Note – Global surface temperatures for May 2019 were slightly less than the trend, but still the 4^rd warmest May on record, 1.05 °C above pre-industrial values. The chart illustrates that some monthly temperatures will exceed the optimistic international limit of 1.5 degrees well before the trend reaches that level. Mild El Niño conditions are present and expected to continue into the Northern Hemisphere summer of 2019. Solar irradiance is approaching the minimum of its ≈11 year cycle, a cooling effect compared to recent years.

Data – Monthly global surface temperature anomaly data (red and blue lines) are monthly differences from the average temperature for that month during the years 1901-2000 and are available from NOAA. The red (blue) lines represent monthly temperatures warmer (cooler) than the trend. Note that 0.2 °C has been added to the NOAA values to account for the difference between the 20^th century average and pre-industrial values.

Trend and Projection — The trend shown in the chart is a quadratic fit to the recorded monthly global temperatures since 1960 relative to pre-industrial values. The projection is the continuation of this curve into future times. Note that the projection will change as the trend changes in response to new data. Recent temperatures are more than half the 2.0 °C target limit established by the Paris agreement. Based on the current projection, global temperatures will be 1.5 °C above pre-industrial levels in 2036 and the Paris Agreement’s +2.0 °C target limit would be surpassed in 2053 (see chart.)

June 25, 2019 CEERT Quarterly Staff Report January - April 2019 - (pdf)

June 19, 2019 Global Warming Data, Trend and Forecast - June 2019 | Dr. Rich Ferguson, CEERT - (pdf)

May 20, 2019 Global Warming Data, Trend and Forecast - May 2019 | Dr. Rich Ferguson, CEERT - (pdf)

April 22, 2019 Global Warming Data, Trend and Forecast - April 2019 | Dr. Rich Ferguson, CEERT - (pdf)

February 19, 2019 Global Warming Data, Trend and Forecast - February 2019 | Dr. Rich Ferguson, CEERT - (pdf)

February 7, 2019 Global Warming Data, Trend and Forecast - January 2019 | Dr. Rich Ferguson, CEERT - (pdf)

December 19, 2018 Global Warming Data, Trend and Forecast - December 2018 | Dr. Rich Ferguson, CEERT - (pdf)

November 20, 2018 Global Warming Data, Trend and Forecast - November 2018 | Dr. Rich Ferguson, CEERT - (pdf)

October 24, 2018 Global Warming Data, Trend and Forecast - October 2018 | Dr. Rich Ferguson, CEERT - (pdf)

September 19, 2018 Global Warming Data, Trend and Forecast - September 2018 | Dr. Rich Ferguson, CEERT - (pdf)

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