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 14, 2010 Acres & Watts: Considering Scale & Renewable Energy - (pdf)

July 10, 2010 Solar, Wind, and Geothermal Resources and the DRECP - (pdf)

October 12, 2009 California Signs First Memorandum of Understanding with U.S. Department of Interior Regarding Renewable Energy: Expediting the Siting of Renewable Energy Projects Needed to Reach CA's 33% Goal - (pdf)

June 1, 2009 Memorandum of Understanding Between the State of California and the Department of the Interior on Renewable Energy - (pdf)

May 21, 2009 Summary: "Waterfall" Value Proposition of Large-Scale Solar Power Technologies in California - (pdf)

May 1, 2009 Value Proposition of Large Scale Solar Power Technologies in California - (pdf)

February 7, 2009 Harvesting CA Renewable Energy Resources: A Green Jobs Business Plan - (pdf)

January 6, 2009 Opinion: U.S. should tax oil instead of letting OPEC do it - (pdf)

February 7, 2008 Harvesting CA Renewable Energy Resources - (pdf)

December 4, 2007 The Role of Technology in Mitigating Global Climate Change - (pdf)

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