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In 2012, the IPCC Special Report on Extreme Weather came out and echoed the Hohenkammer Consensus, concluding that once you adjust for population growth and economic changes, there is no statistical connection between climate change and measures of weather-related damages. In 2013 Pielke testified to the United States Congress and relayed the IPCC findings. Shortly thereafter, Obama’s science advisor John Holdren accused him of misleading Congress and launched a lengthy but ill-informed attack on Pielke, which prompted congressional Democrats to open an investigation into Pielke’s sources of funding (which quickly fizzled amid benign conclusions). Meanwhile heavily funded left-wing groups succeeded in getting him fired from a popular internet news platform. In 2015 Pielke quit the climate field.

So where did the science end up?

In the second half of his talk, Pielke reviews the science as found in the most recent (2013) IPCC Assessment Report, the 2018 U.S. National Climate Assessment, and the most up-to-date scientific data and literature. Nothing substantial has changed.

Globally there’s no clear evidence of trends and patterns in extreme events such as droughts, hurricanes and floods. Some regions experience more, some less and some no trend. Limitations of data and inconsistencies in patterns prevent confident claims about global trends one way or another. There’s no trend in U.S. hurricane landfall frequency or intensity. If anything, the past 50 years has been relatively quiet. There’s no trend in hurricane-related flooding in the U.S. Nor is there evidence of an increase in floods globally. Since 1965, more parts of the U.S. have seen a decrease in flooding than have seen an increase. And from 1940 to today, flood damage as a percentage of GDP has fallen to less than 0.05 per cent per year from about 0.2 per cent.