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‘Dangerously Fast’ Methane Increase Suggests Feedback Mechanism May Have Begun

February 14, 2022
Reading time: 3 minutes

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Methane concentrations in the atmosphere have risen at a “dangerously fast” rate and now exceed 1,900 parts per billion, prompting some researchers to warn that climate change itself may be driving the increase.

Atmospheric methane levels are now nearly triple pre-industrial levels, a news article in the journal Nature states, citing data released last month by the U.S. National Oceanic and Atmospheric Administration (NOAA). “Scientists says the grim milestone underscores the importance of a pledge made at last year’s COP 26 climate summit to curb emissions of methane,” a climate pollutant that Nature cites as at least 28 times more potent than CO2, but is actually 80 to 85 times more damaging over the 20-year span when humanity will be scrambling to get the climate emergency under control.

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While the research focused to some degree on methane released through microbial action, Nature says nearly two-thirds of the methane releases between 2007 and 2016 were caused by human activity.

When the Intergovernmental Panel on Climate Change (IPCC) released its latest, landmark climate science assessment in August, researchers pointed to rapid, deep methane cuts as the single most important step in stemming the rise of the greenhouse gases that cause climate change. In early November, scientists warned that the 30% reduction pledge at COP 26 fell short of what was needed.

The new research shows the problem getting worse.

“The growth of methane emissions slowed around the turn of the millennium, but began a rapid and mysterious uptick around 2007,” Nature writes. “The spike has caused many researchers to worry that global warming is creating a feedback mechanism that will cause ever more methane to be released, making it even harder to rein in rising temperatures.”

The report explains the analysis scientists conduct to attribute to accurately attribute methane emissions to different sources, from microbial activity to fossil fuel production. Xin Lan, an atmospheric scientist at NOAA’s Global Monitoring Laboratory in Boulder, Colorado, said microbes account for 85% of the emissions increase since 2007, with the rest due to fossil fuel production.

“Is warming feeding the warming? It’s an incredibly important question,” said Royal Holloway, University of London Earth scientist Euan Nisbet. “As yet, no answer, but it very much looks that way.”

But “regardless of how this mystery plays out, humans are not off the hook,” Nature adds. “Based on their latest analysis of the isotopic trends, Lan’s team estimates that anthropogenic sources such as livestock, agricultural waste, landfill, and fossil fuel extraction accounted for about 62% of total methane emissions from 2007 to 2016.”

The Nature report last week landed just five days after new satellite imagery identified “ultra-emitters” in Turkmenistan, Russia, and the United States as the world’s biggest sources of methane leaks from oil and gas facilities, New Scientist reports. The next three biggest emitters were Iran, Algeria, and Kazakhstan.

“While huge plumes of methane leaking from gas pipelines have been detected by satellites at individual sites, such as a gas well in Ohio and several pipelines in central Turkmenistan, little has been know about their extent globally,” New Scientist explains. “Now, images captured by an instrument aboard a satellite have been run through an algorithm to automatically detect the biggest plumes of methane streaming from oil and gas facilities worldwide.”

The more than 25 tonnes of methane per hour coming from the ultra-emitters is “a heck of a lot”, U.S. Environmental Defense Fund Chief Scientist Steve Hamburg told New Scientist climate specialist Adam Vaughan.

“Collectively, these contribute about eight million tonnes of methane a year, about a tenth of the oil and gas industry’s total annual emissions for 2019-20,” Vaughan writes.

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Comments 4

  1. Kirk Norring says:
    1 year ago

    Are you ready for real summer heat?
    I hope you are. I don’t plan on staying here past this coming summer.
    For the record, Methane is 155-200 times more powerful in it’s first year in the atmosphere.

    Those lower values are the average over a hundred year span of time. It is very deceptive to be using those values.
    If you want to save lives then you may want to try being a little more honest by using data for the next few years.

    Reply
    • Mitchell Beer says:
      1 year ago

      Thanks, Kirk. We aren’t trying to mislead anyone — quite the contrary. We make clear in the story that the warming impact attributed to methane depends on time frame. This is the first time I’ve seen a number for the first-year impact, so thanks for that, and I’ll watch for it in our future sourcing. We generally try to emphasize the 20-year time span that will be decisive in getting climate change under control.

      But your timing with this comment is perfect. This morning Bloomberg Green ran an opinion/analysis piece on the 30-year-old practice of using a longer time frame to represent methane’s global warming potential. It’s worth a read: https://www.bloomberg.com/news/articles/2022-02-15/the-case-against-methane-emissions-keeps-getting-stronger

      Reply
  2. Tom Johnston says:
    8 months ago

    It’s a real shame this article makes no distinction between fossil fuel emissions and biogenic emissions. They aren’t the same thing in any way, but sadly the IPCC has not drawn any distinction between them in their recommendation to reduce methane emissions.

    This is bordering on neglect and will be seen as such in future generations, filing it in the what-were-they-thinking drawer.

    Reply
    • Mitchell Beer says:
      8 months ago

      We do know that methane emissions from the fossil industry have been skyrocketing, largely because they’ve been able to get away with it due to challenges with monitoring — and smaller operators, in particular, were only too happy to take advantage. Satellites are starting to pick up some horrific readings from specific fossil infrastructure, and some investors are taking note.

      Reply

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