— Terry L. Anderson is the William A. Dunn Distinguished Senior Fellow at the Property and Environment Research Center in Bozeman, Mont., the John and Jean DeNault Senior Fellow at Stanford University’s Hoover Institution, and the co-author of Free Market Environmentalism for the Next Generation.
In a speech last week at the Coast Guard Academy commencement ceremony, President Obama reiterated the assertion that “climate change is real.” He then leapt to the conclusion that “climate change will mean more extreme storms,” before predicting that we would see a “rise in climate-change refugees” caused by droughts, hurricanes, and water shortages.
Scientists, however, caution against making a connection between climate change and severe weather. Responding to a handful of ad hoc correlations between rising temperatures and weather events reported in the Bulletin of the American Meteorological Society in 2014, Penn State University climate scientist Michael Mann said he was “unconvinced that these special reports properly inform the larger public discourse” and feared that “they create more confusion than clarity.”
Claims such as those made by Obama add to confusion about global warming because they detract from the long-term nature of the problem. The president is correct in saying the earth is warming. A simple trend-line of the Earth’s global land-ocean surface temperature from 1880 to the present shows that temperatures have been rising at a rate of 0.67 degrees Celsius (1 degree Fahrenheit) per century (measured in terms of the deviations of annual mean global temperatures from the 1951–80 average).