Quantcast
Environmental News for a Healthier Planet and Life

Scientists Say Methane Release Is Starting in Arctic Ocean. How Concerned Should We Be?

Climate
Scientists Say Methane Release Is Starting in Arctic Ocean. How Concerned Should We Be?
Researchers say they have observed methane being released along a wide swath of the slope of the Laptev Sea. Aerohod / CC BY-SA 4.0

Arctic Ocean sediments are full of frozen gases known as hydrates, and scientists have long been concerned about what will happen when and if the climate crisis induces them to thaw. That is because one of them is methane, a greenhouse gas that has 80 times the warming impact of carbon dioxide over a 20 year period. In fact, the U.S. Geological Survey has listed Arctic hydrate destabilization as one of the four most serious triggers for even more rapid climate change.


Now, scientists onboard the Russian research ship R/V Akademik Keldysh have told The Guardian that there is evidence this destabilization has already begun off Siberia's eastern coast.

"The discovery of actively releasing shelf slope hydrates is very important and unknown until now," vessel chief scientist Igor Semiletov of the Russian Academy of Sciences told The Guardian. "This is a new page."

The international team of 60 researchers said Tuesday they were the first to observe methane release over a wide area of the continental slope off of Eastern Siberia. They observed bubbles being released from ocean sediment at six different observation points over a 150 kilometer (approximately 93 miles) by 10 kilometer (approximately 6 miles) stretch of the slope.

They also recorded methane concentrations of as much as 1,600 nanomoles per liter at a depth of around 300 meters (approximately 984 feet) on the slope of the Laptev Sea. That's 400 times higher a concentration than would be expected in normal circumstances.

While the methane bubbles are still being absorbed by the ocean, the researchers did measure methane concentrations near the surface that were four to eight times higher than normal, and said this methane would make it into the atmosphere.

"At this moment, there is unlikely to be any major impact on global warming, but the point is that this process has now been triggered. This East Siberian slope methane hydrate system has been perturbed and the process will be ongoing," Swedish scientist Örjan Gustafsso of Stockholm University told The Guardian.

This isn't the first alarming find that Semitelov's expedition has turned up. Last fall, they released images of a methane fountain bubbling up from the floor of the East Siberian Sea, The Moscow Times reported.

However, the researchers urged caution in responding to their findings. They stressed that they needed to be confirmed once the expedition is over and the data can be reviewed and written up in a peer reviewed journal.

"Potentially they can have serious climate consequences," Semitelov told The Guardian of his discoveries, "but we need more study before we can confirm that."

Scientists who were not involved with the study responded with skepticism to The Guardian story, The Week reported.

Climate scientist Zeke Hausfather pointed to a major study of global methane emissions that relied on both satellite data and on-site observations and found that there was no increase in Arctic Ocean methane emissions as of 2017.

Gavin Schmidt, a climatologist and director of the NASA Goddard Institute for Space Studies, argued that there was no evidence that Arctic methane had had a significant climate impact in earlier eras when the region was even warmer than it is today.

"This story is ... unconvincing," he tweeted. "First off it's just two scientists (no publication), one of whom has made similar (unsupported) claims before & ignores the context that permafrost & methane have been degrading in this region since it was inundated in the early Holocene."

A group of climate activists that have been cycling from the North of the country in stages to draw attention to the climate case are arriving to the Court of Justice on the day that the climate lawsuit against Shell starts in The Hague, on December 1st, 2020. Romy Arroyo Fernandez / NurPhoto / Getty Images

By Julia Conley

Representing more than 17,000 claimants who support climate action, the international organization Friends of the Earth on Tuesday opened its case against fossil fuel giant Shell at The Hague by demanding that a judge order the corporation to significantly reduce its carbon emissions in the next decade.

Read More Show Less

EcoWatch Daily Newsletter

Eat Just, Inc. announced that its cultured chicken has been approved for sale in Singapore as an ingredient in chicken bites. The company has developed other cultured chicken formats as well. Eat Just

As concern mounts over the environmental impacts of animal agriculture, Singapore has issued the world's first regulatory approval for lab-grown meat.

Read More Show Less

Trending

Wildfires are seen burning out of control on November 30, 2020 on Fraser Island, Australia. Queensland Fire and Emergency Services / Getty Images

The world's largest sand island has been on fire for the past six weeks due to a campfire, and Australia's firefighters have yet to prevent flames from destroying the fragile ecosystem.

Read More Show Less
A plane sprays pesticide over the Wynwood neighborhood in the hope of controlling and reducing the number of mosquitos, some of which may be capable of spreading the Zika virus on Aug. 6, 2016 in Miami, Florida. Joe Raedle / Getty Images

By Jessica Corbett

A national nonprofit revealed Tuesday that testing commissioned by the group as well as separate analysis conducted by Massachusetts officials show samples of an aerially sprayed pesticide used by the commonwealth and at least 25 other states to control mosquito-borne illnesses contain toxic substances that critics call "forever chemicals."

Read More Show Less
Prime Minister Jacinda Ardern plants a tree as part of Trees That Count, a project to help New Zealand make a positive impact on climate change, on June 30, 2019 in Wellington, New Zealand. Hagen Hopkins / Getty Images

The government of New Zealand declared a climate emergency on Wednesday, a symbolic step recognizing the Intergovernmental Panel on Climate Change (IPCC) predictions of substantial global warming if emissions do not fall.

Read More Show Less