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The Climate Has a Gun – The Wall Street Journal

Clint Eastwood in ‘Dirty Harry’ (1971).

Photo: Corbis via Getty Images

In “Climate Change Brings a Flood of Hyperbole” (op-ed, Aug. 11), Steven Koonin put himself in the unenviable position of playing down climate change precisely while we are experiencing unprecedented heat waves, storms, fires, droughts, and floods that exceed model-based expectations.

Mr. Koonin claims that regional projections are “meant to scare people.” But the paper he cites for support addresses the “unfolding of what may become catastrophic changes to Earth’s climate” and argues that “being able to anticipate what would otherwise be surprises in extreme weather and climate variations” requires better models. In other words, our current models cannot rule out a catastrophic future.

Model uncertainty is two-edged. If we’d been lucky, we’d be discovering that we overestimated the danger. But all indicators suggest the opposite. Those who dismiss climate risk often appeal to uncertainty, but they have it backward. Climate uncertainty is like not knowing how many shots Dirty Harry fired from his .44-caliber Magnum. Now that it’s pointed at our head, it’s dawning on us that we’ve probably miscalculated. By the time we’re sure, it’s too late. We’ve got to ask ourselves one question: Do we feel lucky? Well, do we?

Adj. Prof. Mark Boslough

University of New Mexico

Albuquerque, N.M.

Prof. Michael Mann

Penn State University

State College, Pa.

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Appeared in the August 18, 2021, print edition as ‘The Climate Has a Gun—Time to Think Fast.’

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