Published online Jan. 4, 2018
Global warming is no hoax, but neither does it portend a climate crisis! PAW’s article (“Feeling the Heat,” Life of the Mind, Nov. 8) asserts that “climate models predict a national rise in temperature of between 2 and 7 degrees Celsius over the next 100 years.” However, climate models have been shown to exaggerate global warming by factors between 2 and 3! Real-world measurements show that since about 1950, when carbon emissions began to increase rapidly — averaging at least 2 percent per year — the global surface temperatures have increased on average about 0.12 C per decade or 1.2 C in 100 years. Why do scientists and the media continue to use the above alarmist model predictions?
Please see the climate establishment’s UN IPCC’s Climate Change 2014 Summary, etc., page 3, Figure SPM.1, panels (a) and (d ), showing the increases in global-temperature rise and CO2 emissions.
There are also several analyses of satellite data showing similar moderate rates of temperature increase — data available since 1979. Professor John Christy summarized these in a presentation to the House Committee on Science, Space, and Technology, and compared them to climate models, showing the large over-warming they predicted! The link to his House report is:
The UN’s IPCC reports never compare their model predictions to the real-world measurements of global temperature change, but always merely quote the alarmist (and wrong) model predictions.