Here’s what real science says about the role of CO2 as Earth’s preeminent climatic thermostat
The relatively thin atmospheric cocoon that protects us from meteor impacts and radiation also makes for a habitable climate, thanks to the greenhouse gases it contains — carbon dioxide first and foremost. In this photograph captured by an astronaut aboard the International Space Station on July 31, 2011, the oblique angle reveals the atmosphere’s layers, along with a thin crescent Moon illuminated by the Sun from below the horizon of the Earth. (Source: NASA Earth Observatory)
Whenever I post something here at ImaGeo involving climate change, it’s a good bet that I’ll get a spectrum of critical responses in the comments section. These range from skepticism about the urgency of the problem to outright dismissal of humankind’s influence on climate through our emissions of greenhouse gases.
A recent post here about thawing permafrost releasing climate-warming carbon dioxide into the atmosphere was no exception. For the story, I reviewed dozens scientific research papers, and used information and quotations from two interviews. Based on that reporting, here’s what I wrote at the top of the story:
The coldest reaches of the Arctic on land were once thought to be at least temporarily shielded from a major — and worrisome — effect of a warming climate: widespread melting of permafrost. But a recent study suggests these northernmost Arctic areas are likely to thaw much sooner than expected. That’s concerning because melting permafrost releases climate-warming greenhouse gases.
As always, I expected skeptical pushback — but nothing as extreme as this:
As CO2 has had no noticeable effect on climate in 600 million years, until 15- 20 years ago, when carbon tax was invented, any alleged climatic effects can be ignored.
I took this to mean that a liberal scientific establishment invented the idea that carbon dioxide plays a role in Earth’s climate system to support raising taxes.
Never mind that relatively simple physics worked out in the 1800s, and since corroborated by experiments and observations, show that adding CO2 to the atmosphere should raise Earth’s average temperature.
I ordinarily ignore comments like the one I quote above. Discover is a science magazine, not a platform for political grandstanding. And it is especially not a platform for ideas that run counter to basic physics and more than a century of hard scientific work by generations of researchers.
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