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 4rd 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 20th 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.)



July 19, 2011 CEERT Update July - (pdf)

July 14, 2011 Salazar Approves Major Renewable Energy Projects, Identifies Next Step in Solar Energy Development - (pdf)

July 12, 2011 Workforce Needs for Distributed Solar Projects - (pdf)

July 1, 2011 CEERT Quarterly Staff Report April-June, 2011 - (pdf)

May 3, 2011 A Health Wreck for America's Children - (pdf)

April 2, 2011 California Desert & Renewable Energy Working Group - (pdf)

April 11, 2011 CEERT Policy Update, January 2011: The Past Four Months at a Glance - (pdf)

November 4, 2010 Workforce Needs for Renewable Energy Powerplants in Southern California - (pdf)

September 21, 2010 Quarterly Staff Report May - August 2010 - (pdf)

September 15, 2010 Workforce Needds For Large-Scale Solar Projects - (pdf)

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