The 11 th Scientific Committee on Antarctic Research conference was held in Pucón, Chile August 19-23, 2024. Fifteen-hundred academics, researchers, and scientists specializing in Antarctica met to share cutting-edge research. Reports at the conference exposed new dimensions of the Antarctic risk profile that should move the world’s leadership posthaste to mitigate society’s self-destructive dependence on fossil fuels. Antarctica is starting to carry the brunt of too much CO2 leading to too much heat, leading to unstable ice sheets. And it’s happening much, much faster than anybody thought possible. This is a relatively new development that could have far-reaching consequences.
For example, Gino Casassa, glaciologist, head of Chilean Antarctica Institute commented: “Current estimates show sea levels rising by 4 meters (13 feet) by 2100 and more if emissions continue to grow.” (Source: Scientists in Chile Question if Antarctica Has Hit a Point of No Return, Reuters, August 28, 2024)
Thirteen feet higher won’t suddenly appear in 2100. It builds up over decades. Assuming emissions “continue to grow”, as warned by Dr. Casassa, you’ve gotta wonder, with 13 feet by 2100, what will 2035, or 2050, look like? That’s right around the corner.
Sea level rise is one of the most challenging fields in science and thus produces the most complex results. For example, in comparison to Casassa’s estimate of 13 feet by 2100, a recent study: What Are the Best – and Worst – Case Scenarios for Sea Level Rise? MIT Climate Portal, June 12, 2024: “By 2100, we could see as little as 8 inches of additional sea level rise, or over 6 feet—based partly on how much we continue to pollute the climate, and partly on how the oceans respond to climate change that's already baked in… despite the enormous stakes for the future of humanity, it remains frustratingly difficult to know how much sea level rise is in store for us. All we know for sure is that
taking strong and immediate action to control our greenhouse gas emissions gives us the best chance to avoid meters of sea level rise. ‘The difference between the low-end projections and the high-end projections is many trillions of dollars in infrastructure, and hundreds of millions of people losing their homes,’ Minchew says (Brent Minchew, MIT geophysicist) ‘But we don't have a good answer to which one of those scenarios is more likely.”
The biggest concern echoed throughout the conference hall: “Antarctica is changing faster than expected.” For example: “Extreme weather events in the ice-covered continent were no longer hypothetical presentations, but first-hand accounts from researchers about heavy rainfall, intense heat waves and sudden Foehn (strong dry winds) events at research stations that led to mass melting, giant glacier breakoffs and dangerous weather conditions with global implications,” Ibid.
A hot topic was whether Antarctica has reached a tipping point, a point of accelerated, irreversible sea ice loss, especially West Antarctica where the Thwaites Doomsday Glacier is located. But scientists have yet to determine whether current observations indicate a ‘temporary blip” or a “downward plunge of sea ice.” Nevertheless, by all appearances, it’s advanced far enough for “plunging sea ice” to raise very serious concerns.
What is clear is the rate of change, unprecedented, nothing compares. According to Liz Keller, a paleoclimate specialist at Victoria University of Wellington/New Zealand; You might see the same rise in CO2 over thousands of years, and now it’s happened in 100 years,” Ibid. Which is a prime example of today’s human-generated climate change working 10 times faster than nature on its own.
That one factor is what confuses those who argue “oh yeah, the climate always changes, so what?” However, there’s regular climate change in nature, like they allude to, which takes centuries to develop and then, there’s turbo-charged climate change, like we’ve got now that takes decades, not centuries, thanks to human-generated excessive CO2 thrusts from burning fossil fuels.
Climate change has become a straight-forward function of human activity.
Hopefulness
According to some reports at the conference, “the worst-case scenarios can be avoided by dramatically reducing fossil fuel emissions.” Specifically, regarding mitigation, Mike Weber, a paleoceanographer, University of Bonn, who specializes in Antarctic ice sheet stability: “If we keep emissions low, we can stop this eventually. If we keep them high, we have a runaway situation and we cannot do anything.”
On the other hand, there is evidence that ecosystems may already be exceeding boundaries, e.g., Mathieu Casado, a paleoclimate and polar meteorologist at France’s Climate and Environment Sciences Laboratory claims dozens of ice core collected throughout the ice sheet have allowed him to reconstruct temperature patterns in Antarctica dating back 800,000 years. The last time the planet was as warm as today, 125,000 years ago, sea levels were 6-to-9 meters (20-to-30 feet) higher with a large contribution coming from West Antarctica. Ipso facto, with temperatures today as warm as 125,000 years ago causing seas to be 20-30 feet higher, then every coastal megacity should be/will be flooded, which begs the obvious question of “how long do these things take to playout?” And, more importantly, how do we get CO2 and temperatures back down?
Speakers at the conference made special note of the extraordinary speed and amount of carbon -CO2- being pumped into the atmosphere, unprecedented, causing rapid global warming. There’s no previous paleoclimate record of CO2 hitting the planet with such ferocity and large scale and so suddenly. This recalls Michael Mann’s Hockey Stick that famously said it all with one vertical image.
The hockey stick graph is a visualization of the average temperature of the Northern Hemisphere over the past 500 to 2000 years. Because of the spectacular hockey stick concept, Professor Mann became an overnight target of right-wing charlatans and fossil fuel attempts to destroy him. They failed: A Jury in February 2024 awarded Mann more than US$1 million in a lawsuit that accused two conservative commentators of defamation for challenging his research and comparing him to a convicted child molester.
“The Hockey Stick achieved prominence in a 2001 UN report on climate change and quickly became a central icon in the ‘climate wars.’ The real issue has never been the graph’s data but rather its implied threat to those who oppose governmental regulation and other restraints to protect the environment and planet.” (Foreword by Bill Nye, The Hockey Stick and The Climate Wars by Michael E. Mann)
In that regard, with parts of West Antarctica hanging by a very big thread, timing couldn’t be worse as the climate wars heat up once again: Bloomberg News headline: Right-Wing Populist Backlash Is Threatening Climate Fight d/d June 20, 2024: “The green revolution is in trouble. The rise of the nationalist right in much of the Western world has placed huge question marks over commitments to transition out of fossil fuels to fight climate change. Donald Trump in the US and other populist
politicians have vowed to jettison low-carbon policies and downplayed the impact of global warming.”
Antarctica has rapidly become a dangerous climate change symbol of major concern and nail-biting as it serves to verify Mann’s early warnings. Global warming has become humanity’s number one challenge for survival of the species. Mann’s Hockey Stick is an amazing analog of 8 billion people sucking up oil from the planet, belching out CO2 in hockey stick fashion, vertically, up, up, and away into an increasingly overloaded CO2 atmosphere that weighs on planetary heat.
Reality
Meanwhile, as stated numerous times in articles like this one, the oil and gas industry has publicly brushed aside concerns about climate change. Looking ahead to the future, it’s full bore, full speed ahead with record-setting fossil fuel production and record-setting CO2 on a very full agenda of oil and gas production to 2030 and beyond.
“The world’s fossil-fuel producers are on track to nearly quadruple the amount of extracted oil and gas from newly approved projects by the end of this decade, with the US leading the way in a surge of activity that threatens to blow apart agreed climate goals.” (The Guardian, March 28, 2024). Questioning whether West Antarctica, especially the Doomsday Glacier, can survive the onslaught of fossil fuel interests looking the other way as right-wing interests threaten anything and everything green.
According to Mike Weber, paleoceanographer, University of Bonn, who specializes in Antarctic ice sheet stability, regarding fossil fuel CO2 emissions: “If we keep them high, we have a runaway situation, and we cannot do anything.”
We’re keeping ’em high.
