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Record Methane Leak from Nord Stream Pipelines is ‘Catastrophic for Climate’

September 29, 2022
Reading time: 3 minutes
Full Story: The Associated Press @AP
Primary Author: Jan M. Olsen @JanMOlsen, Patrick Whittle @pxwhittle

Pjotr Mahhonin/Wikimedia Commons

Pjotr Mahhonin/Wikimedia Commons

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Methane leaking from the damaged Nord Stream pipelines is likely the biggest burst of the climate super-pollutant on record by far, and countries in the region suspect this week’s undersea explosions were a case of sabotage.

The stricken pipelines are pumping huge volumes of methane into the Baltic Sea and atmosphere and could discharge as much as five times as much of the potent greenhouse gas as was released by California’s Aliso Canyon disaster, the largest known terrestrial release of methane in U.S. history, The Associated Press reports.

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“Whoever ordered this should be prosecuted for war crimes and go to jail,” said Stanford University climate scientist Rob Jackson. Two scientists looked at the official worst case scenario estimates provided by the Danish government—778 million cubic metres of gas—for AP. Jackson and David Hastings, a retired chemical oceanographer in Gainesville, Florida, each calculated that would be an equivalent of roughly half a million tonnes of methane. That would be the equivalent of one third of Denmark’s total annual greenhouse gas emissions, a Danish official said Wednesday. The Aliso Canyon disaster released 90,000 to 100,000 tonnes, AP writes.

Andrew Baxter, a chemical engineer who formerly worked in the offshore oil and gas industry, and is now at the U.S. Environmental Defense Fund, thought the Danish estimate was likely too high. But his more conservative calculation was still more than double the Aliso Canyon disaster.

“That’s one thing that is consistent with these estimates,” he said. “It’s catastrophic for the climate.”

Kristoffer Böttzauw, head of the Danish Energy Agency, said emissions from the three leaks on the underwater Nord Stream 1 and 2 pipelines correspond to about 32% of annual Danish carbon dioxide emissions. Danish emissions in 2020 were approximately 45 million tonnes of CO2.

Sabotage was suspected to have caused the leaks, and seismologists said Tuesday that explosions rattled the Baltic Sea before they were discovered. Some European officials and energy experts have said Russia is likely to blame since it directly benefits from higher energy prices and economic anxiety across Europe. Others cautioned against pointing fingers until investigators can determine what happened.

Methane seen bubbling at the ocean surface was an indication of “a strong upward flow,” said Paul Balcombe, a member of the engineering faculty at the department of chemical engineering at Imperial College London.

The loss of pressure in the pipe likely meant a large amount of gas was already lost, he said. The impacts of the gas leak are still coming into focus, Balcombe said, but are likely to be significant.

“It would have a very large environmental and climate impact indeed, even if it released a fraction of this,” he said.

Methane is a major contributor to climate change, responsible for a significant share of the climate disruption people and other species are already experiencing. It’s 82 times more potent a greenhouse gas than carbon dioxide over the crucial 20-year span when humanity will be scrambling to get emissions under control.

Böttzauw told media the Danish agency expects the gas to be out of the pipes, which run from Russia to Germany, by Sunday.

“We believe that half the gas is out by now of one of the two pipes,” Böttzauw said. “We are talking about a huge spill of several million cubic metres of gas.”

The Danish agency statement added that its calculation was based on information from operators Nord Stream AG and Nord Stream 2 AG about the content of natural gas in the three pipelines that are leaking.

The incidents come as the EU struggles to keep a lid on soaring gas and electricity prices.

“As long as there is gas, it dangerous to be there,” Böttzauw said. He declined to comment on when experts would be able to go down and see the pipes, which he said were made of 12-centimetre-thick steel coated with concrete. They lie on the seabed between 70 and 90 metres (230 feet and 295 feet) deep.

The leaks were all in international waters. Two were within the Danish exclusive economic zone while the third is in the Swedish equivalent.

This Associated Press story was republished by The Canadian Press on September 28, 2022.

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in International Security & War, Methane, Oil & Gas, Pipelines / Rail Transport, UK & Europe

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Comments 1

  1. Charles Ellinas says:
    1 year ago

    The quantities of leaked methane are huge. Some estimate these will exceed 400,000 tonnes. But is still less than 0.1% of the methane estimated to be emitted every year globally

    Reply

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