Good Methane Burps

Liam M. Higgins

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We’ve been hearing for a while how warming temperatures might release huge burps from methane deposits on the seafloor and from permafrost—frozen reservoirs known as clathrates.

This is not something we want. Methane is 20 times more powerful than carbon dioxide as a greenhouse gas. In the last 150 years it’s more than doubled in the atmosphere until today it totals about half the greenhouse effect caused by carbon.

The good news is that the latest belch 11,600 years ago appears to have been caused by expanding wetlands not melting methane ice. This according to a Scripps Institution of Oceanography study measuring carbon-14 isotopes in methane from air bubbles trapped in glacial ice. They found the surge 11 millennia ago was more chemically consistent with an expansion of wetlands. The paper’s in Science.

Wetlands profusely produce methane as bacteria breakdown organic matter. Wetlands also tend to spread during warming periods.

Not this one though. We’re destroying coastal and inland wetlands faster than any other ecosystem on Earth, according to the 2005 Millennium Ecosystem Assessment.

So we’re killing off the methane factories. But also the biodiversity factories, the water filtration factories, the storm-buffer factories. Wetlands provide ecosystem services estimated at $14 trillion a year.

Sigh. Burp.
 

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We didn't know what to expect when we told you we needed to raise $400,000 before our fiscal year closed on June 30, and we're thrilled to report that our incredible community of readers contributed some $415,000 to help us keep charging as hard as we can during this crazy year.

You just sent an incredible message: that quality journalism doesn't have to answer to advertisers, billionaires, or hedge funds; that newsrooms can eke out an existence thanks primarily to the generosity of its readers. That's so powerful. Especially during what's been called a "media extinction event" when those looking to make a profit from the news pull back, the Mother Jones community steps in.

The months and years ahead won't be easy. Far from it. But there's no one we'd rather face the big challenges with than you, our committed and passionate readers, and our team of fearless reporters who show up every day.

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