Antarctic Circumpolar Current (in yellow). Climate models show the current could slow down 20% by 2050. Illustration: Dr Taimoor Sohail
Melting Antarctic ice is releasing cold, fresh water into the ocean, which is projected to cause the slowdown
In a high emissions future, the world’s strongest ocean current could slow down by 20% by 2050, further accelerating Antarctic ice sheet melting and sea level rise, an Australian-led study has found.
The Antarctic Circumpolar Current – a clockwise current more than four times stronger than the Gulf Stream that links the Atlantic, Pacific and Indian oceans – plays a critical role in the climate system by influencing the uptake of heat and carbon dioxide in the ocean and preventing warmer waters from reaching Antarctica.
Using Australia’s fastest supercomputer and climate simulator, Gadi, located at Access National Research Infrastructure in Canberra, the researchers used climate models to analyse the impact of changing temperature, ice melting and wind conditions on the Antarctic Circumpolar Current.
The results, published in Environmental Research Letters, revealed a clear link between meltwater from Antarctic ice shelves and circumpolar current slowdown, and comes less than a week after another paper anticipated a weakening in vital Atlantic Ocean currents.
What they found suggested a “substantial reconfiguration of Southern Ocean dynamics”, with “far-reaching impacts on global climate patterns, oceanic heat distribution, and marine ecosystems”.
Co-author Assoc Prof Bishakhdatta Gayen, from the University of Melbourne, described the result as “quite alarming”.
He explained that as melting Antarctic ice released cold, fresh water into the ocean, this sank and spread towards the equator. That flow of fresh water changed the density variation in the ocean, a key driver of movement, causing the slowdown.
“The ocean is extremely complex and finely balanced. If this current ‘engine’ breaks down, there could be severe consequences, including more climate variability, with greater extremes in certain regions, and accelerated global warming due to a reduction in the ocean’s capacity to act as a carbon sink,” Gayen said.
Experienced climbers scale a rock face near the historic Dumbarton castle in Glasgow, releasing a banner that reads “Climate on a Cliff Edge.” One activist, dressed as a globe, symbolically looms near the edge, while another plays the bagpipes on the shores below. | Photo courtesy of Extinction Rebellion and Mark RichardsNeo-Fascist Climate Science Denier Donald Trump says Burn, Baby, Burn.
U.S. Energy Secretary Chris Wright speaking at the 2025 Alliance for Responsible Citizenship conference. Credit: ARC / YouTube
The Trump appointee and fossil fuel executive called the transition to renewable energy “lunacy” at an event packed with climate science deniers.
Donald Trump’s new energy secretary has today vowed to “get out of the way” of coal, oil and gas, and called the UK’s 2050 net zero target “a sinister goal” that would “impoverish” people.
Chris Wright, an oil and gas industry executive appointed by U.S. President Trump, was speaking via video link at the Alliance for Responsible Citizenship (ARC) conference in London, a right-wing forum run by fierce opponents of climate policies.
He also downplayed the threat from extreme weather, and suggested that climate action is part of a plot to “grow government power” and “shrink human freedom”.
The ARC conference, taking place this week at the ExCel centre in east London, includes speeches by Conservative Party leader Kemi Badenoch, Republican Party Speaker of the House Mike Johnson, Reform UK leader Nigel Farage, and Canadian psychologist and ARC founder Jordan Peterson.
As DeSmog revealed on Monday, a leaked guest list for the event includes executives from oil and gas giants, including BP, Koch Inc., Valero Energy, and Energy Transfer.
Until his appointment, Wright was the CEO of the fracking services company Liberty Energy. According to its 2023 tax filing, Wright was also a director of the Western Energy Alliance (WEA), a trade group representing more than 300 companies in the oil and gas industry. WEA has historically lobbied against oil and gas industry restrictions.
In a video posted to LinkedIn in January 2023, Wright said, “There is no climate crisis”.
‘Sinister Agenda’
Wright told the ARC audience today that he wanted to “increase the supply of affordable, reliable energy” by lifting the pause on natural gas and scrapping regulations on nuclear energy.
When asked about coal, oil and gas, he said: “Oh absolutely. The world today runs on coal oil and gas, and it’s been a tremendous success. I should have said number one [of his plan] is get out of the way of the production, export and enhancement of our volumes of coal, oil and gas.”
The energy secretary also attacked the UK’s legally-binding target of cutting emissions to net zero by 2050.
“Net zero 2050 is a sinister goal”, he said. “It’s a terrible goal. It’s both unachievable by any practical means, but the aggressive pursuit of it – and you’re sitting in a country that has aggressively pursued this goal – has not delivered any benefits, but it’s delivered tremendous cost.”
He added: “This is not energy transition, this is lunacy. This is impoverishing your own citizens in a delusion that this is somehow gonna make the world a better place. It’s not.”
The world’s foremost climate science body, the UN’s Intergovernmental Panel on Climate Change (IPCC), has stated that – without achieving net zero by 2050 and limiting warming to 1.5C – the world will struggle to contain the worst effects of climate change. These include droughts, flooding, poverty, and mass displacement.
Wright went on to claim that “We’re scaring children all the time with stories of extreme weather” when “deaths from extreme weather have plummeted for 100 years”.
Better forecasting and preparation have cut extreme weather deaths over this period, but the number and intensity of extreme weather events have increased, and they continue to be disproportionately fatal in the least developed countries.
The energy secretary also claimed that “climate-obsessed people […] know very little about the climate data”, before alluding to the conspiracy theory that climate change is being used to impose a green tyranny.
“I think the agenda might be different here than climate change”, he said. “It’s certainly been a powerful tool used to grow government power, top down control, and shrink human freedom. This is sinister.”
Oil and Gas at ARC
Senior representatives from several major fossil fuel producers will be at the ARC event, according to a leaked list of attendees viewed by DeSmog.
Billed as an effort to “re-lay the foundations of civilization,” the conference will feature panels about energy and environment that are filled with prominent deniers of the climate crisis.
That includes Vivek Ramaswamy, a former contender for the U.S. Republican presidential nomination, who has referred to the “climate agenda” as a “hoax,” as well as Nigel Farage, who has called for the UK’s 2050 net zero emissions policies to be “scrapped” entirely.
They will be joined by representatives of prominent climate denial organizations including the CO2 Coalition, and libertarian anti-climate think tanks such as the Cato Institute.
“I had a chance to sit down one-on-one with Chris in 2022 in his Denver office,” claimed Gregory Wrightstone, executive director of the CO2 Coalition, in a newsletter in late 2024.
Wrightstone “was impressed with his [Wright’s] knowledge and views on energy philosophy, which aligned closely with those of the CO2 Coalition.”
“The key takeaway is that he’s a big supporter of the continuing use of fossil fuels, including coal, oil, and natural gas,” Wrightstone said.
ARC is backed by the UAE-based investment firm Legatum Group and British hedge fund millionaire Paul Marshall, who together own the right-wing broadcaster GB News. Marshall provided £1 million in funding to ARC in 2023, which is run by Conservative peer and UK government advisor Baroness Philippa Stroud.
Speaking to the Financial Times ahead of the conference, Marshall claimed that Britain is “going bust” in its pursuit of net zero. As revealed by DeSmog, Paul Marshall’s hedge fund held £1.8 million worth of shares in fossil fuel companies – including in oil and gas giants Chevron, Shell, and Equinor – as of June 2023. One of Marshall Wace’s biggest investors, U.S. private equity firm KKR, also has a large fossil fuel portfolio, including 188 assets in oil, gas, and coal.
Neo-Fascist Climate Science Denier Donald Trump says Burn, Baby, Burn.Experienced climbers scale a rock face near the historic Dumbarton castle in Glasgow, releasing a banner that reads “Climate on a Cliff Edge.” One activist, dressed as a globe, symbolically looms near the edge, while another plays the bagpipes on the shores below. | Photo courtesy of Extinction Rebellion and Mark Richards
Burned trees from the Palisades Fire and dust blown by winds seen from Will Rogers State Park in the Pacific Palisades neighborhood in Los Angeles, California on Jan. 15, 2025. Apu Gomes / Getty Images
Our planet’s plants and soils reached the peak of their ability to absorb carbon dioxide in 2008, and their sequestration rate has been falling ever since, according to a new analysis by a father-and-son team in the United Kingdom.
At first, the added carbon led to warmer temperatures, vegetation growth and a longer growing season. Once a tipping point was reached, however, the combination of heat stress, wildfires, drought, flooding, storms and the spread of new diseases and pests led to a reduction in the amount of carbon plants can soak up.
“The rate of natural sequestration of CO2 from the atmosphere by the terrestrial biosphere peaked in 2008. Atmospheric concentrations will rise more rapidly than previously, in proportion to annual CO2 emissions, as natural sequestration is now declining by 0.25% per year,” the authors of the study wrote. “This effect will accelerate climate change and emphasises the close connection between the climate and nature emergencies. Effort is urgently required to rebuild global biodiversity and to recover its ecosystem services, including natural sequestration.”
Once the tipping point was reached, the chances of unchecked climate breakdown became more likely, reported The Guardian.
Former Chief Executive of the Scottish Environment Protection Agency James Curran, with help from his son Sam, took a detailed look at the world’s changing carbon concentration levels. Their analysis revealed that, since 2008, plants have been absorbing an average of 0.25 percent less carbon dioxide each year.
“The findings are very stark. Emissions now need to fall by 0.3% per year, just to stand still. That’s a tall order since they typically increase by 1.2% per year,” James Curran said, as The Guardian reported.
Experienced climbers scale a rock face near the historic Dumbarton castle in Glasgow, releasing a banner that reads “Climate on a Cliff Edge.” One activist, dressed as a globe, symbolically looms near the edge, while another plays the bagpipes on the shores below. | Photo courtesy of Extinction Rebellion and Mark RichardsNeo-Fascist Climate Science Denier Donald Trump says Burn, Baby, Burn.
