MIT's Richard Lindzen: The Unalarmed Climate Scientist

At the Weekly Standard, "What Catastrophe?":

The Earth’s climate is immensely complex, but the basic principle behind the “greenhouse effect” is easy to understand. The burning of oil, gas, and especially coal pumps carbon dioxide and other gases into the atmosphere, where they allow the sun’s heat to penetrate to the Earth’s surface but impede its escape, thus causing the lower atmosphere and the Earth’s surface to warm. Essentially everybody, Lindzen included, agrees. The question at issue is how sensitive the planet is to increasing concentrations of greenhouse gases (this is called climate sensitivity), and how much the planet will heat up as a result of our pumping into the sky ever more CO2, which remains in the atmosphere for upwards of 1,000 years. (Carbon dioxide, it may be needless to point out, is not a poison. On the contrary, it is necessary for plant life.)

Lindzen doesn’t deny that the climate has changed or that the planet has warmed. “We all agree that temperature has increased since 1800,” he tells me. There’s a caveat, though: It’s increased by “a very small amount. We’re talking about tenths of a degree [Celsius]. We all agree that CO2 is a greenhouse gas. All other things kept equal, [there has been] some warming. As a result, there’s hardly anyone serious who says that man has no role. And in many ways, those have never been the questions. The questions have always been, as they ought to be in science, how much?”

Lindzen says not much at all—and he contends that the “alarmists” vastly overstate the Earth’s climate sensitivity. Judging by where we are now, he appears to have a point; so far, 150 years of burning fossil fuels in large quantities has had a relatively minimal effect on the climate. By some measurements, there is now more CO2 in the atmosphere than there has been at any time in the past 15 million years. Yet since the advent of the Industrial Revolution, the average global temperature has risen by, at most, 1 degree Celsius, or 1.6 degrees Fahrenheit. And while it’s true that sea levels have risen over the same period, it’s believed they’ve been doing so for roughly 20,000 years. What’s more, despite common misconceptions stoked by the media in the wake of Katrina, Sandy, and the recent typhoon in the Philippines, even the IPCC concedes that it has “low confidence” that there has been any measurable uptick in storm intensity thanks to human activity. Moreover, over the past 15 years, as man has emitted record levels of carbon dioxide year after year, the warming trend of previous decades has stopped. Lindzen says this is all consistent with what he holds responsible for climate change: a small bit of man-made impact and a whole lot of natural variability.

The real fight, though, is over what’s coming in the future if humans continue to burn fossil fuels unabated...

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