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February 5, 2022 03:30 am

Satellite Images Show Biggest Methane Leaks Come From Russia and US

An anonymous reader quotes a report from New Scientist: About a tenth of the global oil and gas industry's methane emissions have been found to come from a group of "ultra-emitter" sites located mostly in Turkmenistan, Russia and the US. Methane is a powerful greenhouse gas that governments recently agreed to slash by 2030. 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. 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. These ultra-emitters were spotted pumping out more than 25 tons of methane an hour. That's "a heck of a lot," says Steve Hamburg at Environmental Defense Fund (EDF), a US non-profit organization. Collectively, these contribute about 8 million tons of methane a year, about a tenth of the oil and gas industry's total annual emissions for 2019-20. Turkmenistan was the biggest ultra-emitter, releasing more than a million tons of methane between 2019 and 2020. Russia was second at just under a million tons, followed by the US, Iran, Algeria and Kazakhstan. The US count is probably low because it excluded a major oil and gas region, the Permian basin, due to monitoring difficulties. By contrast to these countries, other major oil producing countries, including Kuwait and Saudi Arabia, had very few ultra-emitters. "The study also found that ultra-emitting sites are releasing so much methane, which could be sold, that it should be cost effective to solve," reports New Scientist. "For the six worst countries, tackling those plumes should cost up to $300 less per ton than it would typically cost to reduce methane from oil and gas facilities in those nations." The report also notes that these findings "are based on a snapshot and some ultraemitters may have gone undetected." The findings have been published in the journal Science.

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