Methane seeping from the permafrost in Canada’s Mackenzie River Delta is a 13 times higher source of methane than from bacterial emissions, which most of us are somewhat familiar with.
According to study authors, this suggests that methane is seeping from deep below the frozen soil of the high Arctic from oil and gas reserves via thermokarst lakes, fault lines, and fissures in the permafrost
Mosquito tornados in Yakutia, now I have seen everything.
Global warming may be unleashing new sources of heat-trapping methane from layers of oil and gas that have been buried deep beneath Arctic permafrost for millennia. As the Earth’s frozen crust thaws, some of that gas appears to be finding new paths to the surface through permafrost that’s starting to resemble Swiss cheese in some areas, scientists said.
In a study released today, the scientists used aerial sampling of the atmosphere to locate methane sources from permafrost along a 10,000 square-kilometer swath of the Mackenzie River Delta in northwestern Canada, an area known to have oil and gas desposits.
Deeply thawed pockets of permafrost, the research suggests, are releasing 17 percent of all the methane measured in the region, even though the emissions hotspots only make up 1 percent of the surface area, the scientists found.
In those areas, the peak concentrations of methane emissions were found to be 13 times higher than levels usually caused by bacterial decomposition—a well-known source of methane emissions from permafrost—which suggests the methane is likely also coming from geological sources, seeping up along faults and cracks in the permafrost, and from beneath lakes.
That article is from 2017; it caught my eye because it is a source of methane that is not included in any climate models.
In Yakutia, Siberias's largest and coldest area with one of the largest forests on earth, the permafrost is on fire.
Last year, wildfires scorched more than 60,000 square miles of forest and tundra, an area the size of Florida. That is more than four times the area that burned in the United States during its devastating 2020 fire season. This year, more than 30,000 square miles have already burned in Russia, according to government statistics, with the region only two weeks into its peak fire season.
Scientists say that the huge fires have been made possible by the extraordinary summer heat in recent years in northern Siberia, which has been warming faster than just about any other part of the world. And the impact may be felt far from Siberia. The fires may potentially accelerate climate change by releasing enormous quantities of greenhouse gases and destroying Russia’s vast boreal forests, which absorb carbon out of the atmosphere.
Last year, the record-setting fires in the remote Siberian region of Yakutia released roughly as much carbon dioxide as did all the fuel consumption in Mexico in 2018, according to Mark Parrington, a senior scientist at the Copernicus Atmosphere Monitoring Service in Reading, England.
Now, Yakutia — a region four times the size of Texas, with its own culture and Turkic language — is burning again.
On some days this month, thick smoke hung over the capital, Yakutsk, the coldest city in the world, making residents’ eyes water and scraping their throats. Outside the city, villagers are consumed by the battle with fire, shoveling trenches to keep it away from their homes and fields, quenching their thirst by digging up the ice sheets embedded in the ground.
Life here revolves around the northern forest, known as the taiga. It is the source of berries, mushrooms, meat, timber and firewood. When it burns, the permafrost below it thaws more quickly, turning lush woods into impenetrable swamps.
Bob Berwyn of Inside Climate News writes:
A dive deep into 27,000 years worth of muck piled up on the bottom of the Arctic Ocean has spurred researchers to renew warnings about a potential surge of greenhouse gas emissions from thawing permafrost.
By tracking chemical and organic fingerprints in long-buried layers of sediments remaining from previously frozen ground, the scientists showed that ancient phases of rapid warming in the Arctic, such as occurred near the end of the last ice age, released carbon on a massive scale. Vast frozen landscapes collapsed, turned to mud and flowed into the sea, releasing carbon dioxide and methane into the atmosphere along the way.
The study, published today in Science Advances, shows that only a few degrees of warming in the Arctic is enough “to abruptly activate large-scale permafrost thawing,” suggesting a “sensitive trigger” for greenhouse gas emissions from thawing permafrost. The results also support climate models that have shown “large injections of CO2 into the atmosphere” when glaciers, and the frozen lands beneath them, melted.