Editor’s note: This article is an update from a year ago. Trying to fix the climate change planetary boundary at the expense of biodiversity or any of the other planetary boundaries is a fool’s errand. This article does not state the fact that it only takes one planetary boundary to collapse to cause a massive die-off of life on the planet. Plus no mention of the poly-crisis of nuclear war, increasing inequality, AI and global economic crash.
Turning and turning in the widening gyre
The falcon cannot hear the falconer;
Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world,
The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned;
The best lack all conviction, while the worst
Are full of passionate intensity. – The Second Coming William Butler Yeats in 1919
By Edward Carver writer for Common Dreams
Six of nine planetary boundaries have already been transgressed, and a seventh, for ocean acidification, is on the verge of being breached, according to a major report released Monday.
The 96-page report, produced by the Potsdam Institute for Climate Impact Research (PIK), is the first in a planned series of annual “planetary health checks.”
The authors found that safe planetary boundaries had already been crossed for the climate, freshwater, land use, biogeochemical flows, novel entities, and biosphere integrity—in keeping with a study in Science Advances last year. They found a “clear trend towards further transgression”—moving deeper into the danger zone, where irreversible tipping points are more likely to be triggered—in each of the six categories.
“Our updated diagnosis shows that vital organs of the Earth system are weakening, leading to a loss of resilience and rising risks of crossing tipping points,” Levke Caesar, a PIK climate physicist lead author of the report, said in a statement that announced a “red alert.”
The health check also showed that ocean acidification, a seventh category, has reached a dangerous precipice, putting the foundations of the marine food web at risk. Ocean acidification, which can threaten coral reefs and phytoplankton populations, is caused by the buildup of carbon dioxide from burning fossil fuels and other human activities.
Caesar said a “safe operating space” threshold for acidification could be crossed in the next few years.
“Looking at the current evolution, I’d say it’s really, really difficult to prevent that [boundary] crossing,” she toldMongabay.
A graphic shows the status of nine environmental categories, four of which have been broken down into two control variables. Image from Planetary Health Check 2024. Design by Globaïa.
PIK director Johan Rockström, a co-author of the new report, helped develop planetary boundary research in the late 2000s. In a seminal 2009 paper in Nature, he and his co-authors found that three of the nine boundaries had already been crossed. That number has gradually gone up based on a series of studies over the last decade.
The planet boundary framework, which is often connected to the degrowth movement, emphasizes that the categories are interconnected.
“The interconnectedness of [planetary boundary] processes means that addressing one issue, such as limiting global warming to 1.5°C, requires tackling all of them collectively,” the new report says.
Boris Sakschewski, a climate scientist who, along with Caesar, is a lead author of the report said that, “We know that all planetary boundary processes act together and each one needs protection to protect the whole system.”
The consequences of continued ocean acidification, which is primarily measured by aragonite saturation, would be severe, the report warns.
Ocean acidification is approaching a critical threshold, with significant declines in surface aragonite saturation, particularly in high-latitude regions like the Arctic and Southern Ocean. These areas are vital for the marine carbon pump and global nutrient cycles, which support marine productivity, biodiversity, and global fisheries. The growing acidification poses an increasing threat to marine ecosystems, especially those reliant on calcium carbonate for shell formation.
Some researchers believe that the ocean acidification threshold has already been crossed, especially given regional variability, with cooler polar waters absorbing more carbon dioxide, causing a faster drop in pH levels.
The report was written with a general audience in mind and is not peer-reviewed, though it’s based on peer-reviewed studies, the authors said.
The final pages of the report present solutions, especially agricultural. A radical overhaul of the global food system, heavily dependent on fertilizer and other harmful inputs, will be necessary to reverse the disturbing trends documented in the report, the authors wrote.
“Sometimes overlooked compared to the impacts of energy production and consumption—particularly the use of fossil fuels—the food systems we depend on are among the largest drivers of environmental degradation. The global food system is the single largest driver behind the transgression of multiple planetary boundaries,” the report says.
Photo by Robin Canfield on Unsplash
I suspect a large part of the reason scientists think the ocean is becoming more acidic is because of the dying of coral reefs, not any real evidence of ocean acidification per se. And the real reason coral reefs are dying all over the world is the common practice of fishermen injecting cyanide into them to make fish float up to the surface where they can easily be scooped up. I have seen this being done in several places around the world and know for a fact it is happening, but have never seen it mentioned in print anyplace.
The whole environmental movement has been hijacked by the silly CO2 = climate change hoax and numerous real environmental problems that something really could be done about are being ignored while all the attention is focused on the relatively harmless and insignificant CO2 issue. And it seems likely the whole CO2 = climate change mythology is a public relations campaign by the nuclear industry to make the public fear combustion power plants and make nuclear power look ”clean and green” by comparison.
Fixing some of the realistic problems would not prevent the impending collapse of civilization, –that is going to happen anyway no matter what anyone does or does not do–but it would be possible to preserve a portion of the biosphere to restock the world with life after the end of the Human Age. The tragedy is that instead of doing that all the effort is being wasted on vain attempts to prevent the fall of civilization.
I’ve long wondered how there is still life on Earth considering what humans have done to the planet. You can talk about boundaries, but they started to be breached long ago when humans began committing agriculture, which in turn caused human overpopulation, which then led to all the myriad of symptoms caused by those root problems. Perhaps the important boundary that’s been breached was the creation of animals that can’t survive with physicality and instead relies on doing all sorts of unnatural and harmful things to survive.