The 2025 Global Tipping Points Report warns that preventing the widespread die-off of coral reefs will now require immense effort.
In a new report released on October 13, 2025, a team of international climate scientists warns that saving tropical coral reefs from destruction caused by rising ocean temperatures will now require extraordinary global effort. The researchers also caution that sections of the polar ice sheets may have already passed their tipping points, meaning their continued melt could lock in several meters of irreversible sea level rise.
One of the lead authors of the Global Tipping Points Report 2025 (GTPR 2025) is Nico Wunderling, Professor of Computational Earth System Sciences at Goethe University’s Center for Critical Computational Studies | C3S and a researcher at the Senckenberg Research Institute Frankfurt. Together with other lead authors, he directed the chapter titled “Earth System Tipping Points and Risks.”
Wunderling says: “The devastating consequences that arise when climate tipping points are crossed pose a massive threat to our societies. There is even a risk of the tipping of one climate system potentially triggering or accelerating the tipping of others. This risk increases significantly once the 1.5°C threshold is exceeded.”
The report identifies roughly two dozen subsystems within Earth’s climate that have potential tipping points. According to the findings, the first of these, the tropical coral reefs, has already been reached. The authors project that global average temperatures will climb to 1.5°C above pre-industrial levels within the next few years, marking a critical stage in which additional tipping points could soon be crossed. Such events could lead to widespread consequences, including sea level rise from melting ice sheets or shifts in global temperatures if the Atlantic Ocean circulation were to collapse. The report also outlines potential strategies to help limit further warming.
A Global Effort for Understanding Earth’s Thresholds
Coordinating lead author of the GTPR 2025 is Tim Lenton, Professor at the University of Exeter’s (UK) Global Systems Institute. More than 100 scientists from over 20 countries contributed to the report, published just in time for the 30th World Climate Conference, which begins on November 10, 2025, in Belém, Brazil. The Global Tipping Points Report, first published in 2023 and already widely noted at the time, is regarded as an authoritative publication in the field of assessing both the risks and opportunities of negative and positive tipping points in the Earth system and in human societies.
Climate tipping points have started receiving greater attention within climate sciences for only about 20 years. The authors of the report define a climate-induced tipping point in Earth systems – such as coral reefs, the Amazon rainforest, or large-scale ocean currents – as the level of warming beyond which these systems undergo self-reinforcing and often irreversible changes. For example, many tropical coral reefs would die off after exceeding their tipping point, even if humanity were to limit further global warming.
The scientists predict that it is quite possible that additional tipping points will be crossed in the coming decades, especially as some may already lie at around 1.5°C of global warming – including those of the Amazon rainforest (leading to savannization), the ice sheets of Greenland and West Antarctica (causing several meters of sea level rise), and the Atlantic Ocean circulation (causing a sharp cooling of the European continent).
Case Studies of Climate Tipping Elements
The GTPR also features a series of case studies on various tipping elements of the climate system, including the following:
- Coral Reefs: Worldwide, coral reefs in tropical regions are suffering unprecedented mortality due to repeated mass bleaching events. The current global warming of about 1.4°C already exceeds their thermal tipping point, which scientists estimate at about 1.2°C. Even in the unrealistic case that warming could be stabilized at 1.5°C, there is a very high probability that the reefs will tip. Many will be permanently lost unless global temperatures drop again to 1°C above pre-industrial levels or less. The longer and the further this threshold is exceeded, the less likely recovery becomes.
- Amazon Rainforest: Climate warming combined with partial deforestation is already exposing the Amazon rainforest to the risk of large-scale savannization at 1.5–2°C of global warming. This, in turn, could further amplify climate change.
- AMOC (Atlantic Meridional Overturning Circulation): The collapse of the AMOC, which includes the Gulf Stream, could already occur at less than 2°C of global warming. This would lead to much colder winters in northwestern Europe, disrupt global monsoon systems, and reduce agricultural yields in large parts of the world.
The GTPR’s authors emphasize that, alongside these negative tipping points in the climate system, there also exist positive tipping points in our societies. Crossing these can trigger rapid transformations toward more climate-friendly behavior. Some examples include:
- Renewable energies are already cheaper than fossil fuels in most parts of the world, and electric vehicles are replacing gasoline and diesel cars on the roads. This trend could prove to be both irreversible and self-reinforcing.
- The gradual introduction and promotion of climate-friendly technologies by policymakers can accelerate the emergence of positive tipping points, including in the adoption of sustainable heating systems or in freight transport.
- “Social contagion” mechanisms can cause a majority of people to adopt behavioral changes initiated by a minority – such as reducing meat consumption or altering mobility habits.
Reference: “Global Tipping Points Report 2025”
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17 Comments
That sounds quite daunting and even scary.
Do you suppose this 3I/ATLAS celestial interloper may be more than a regular comet;
that it may be here to assist us in our effort to harmonize with the environment?
I have just now joined the staff of the journal “The Earth & I” in keeping with this initiative.
Wish you well; hope this dire circumstance is still reversible.
It seems that ” scientists” may have forgotten to look to earth’s past in their”conclusions”
The statements of the article have way too many ” mays” and ” coulds” Be wary of who ends up with most of the funds which will be appropriated to ” fight” this….since many of our planets polluters don’t follow standard sensible policies now, what is the plan….Are we supposed to expect this be done at gunpoint??
Since the forests are drying up for lack of carbon, this is another set of misguided fools incapable of rising from their myopia. Reefs die from pollution – usually unregulated fertilizers and pesticides from farming.
The earth did fine for 4.5 billion years under .2% carbon atmosphere. After humans showed up, it has fallen to 0.04% where halving that to 0.02% will see world wide collapse of vegetation – (that means you die) – see how foolish that stuff is?
These young and coming “authors” – Nic Wunderling ? – change your name kid, that works as a freshman but not in the wider world.
Pollution is the only man made issue. Our climate is controlled by the sun and the sun is controlled by where it is in the Milky Way. When the ice was gone off the planet life was abundant all over. Global warming/climate change is nothing but a political tool. Simple science is all that is needed to debunk the whole con job. As an old person I have lived enough to see scientific so called facts turn into scientific fallacies all the time. I no longer trust scientist because due to their facts not being real fact. Also there are thousands of scientist with no job who are willing to sell their degree and claim whatever they are told to for money.
As we can’t control vindictive lunatic national leaders and allied folk committing mass murder through international pressure, the UN and h hundreds of thousands of sane people marching in demonstrations of human decency, keeping the planet cool enough to avoid the worst predictions of climate scientists is a no-hoper. The recent misbehaviour of Israel has demonstrated that.
This is sbsolute drivel. Earth changes are an inevitable part of our planet, taking place cyclicly. Huge consortium’s are to blame for earth’s disturbed rhythms. ( money making ) using fear is behind it all. Keeping people ignorant is manipulation. There are always two sides to a story. Truth requires research,do it. Youll feel better. Use your wonderful brain.
Of course, I take the article at face value. The way I took losing the Tet Offensive at face value, and Trump was a world ending leader, and covid was deadly the children, and we were going to freeze, back when I was in high school, in the 70s. So let me be clear:
Science will regain its credibility when it fesses up to the fake, dangerous vaccine and all the other agitprop it’s sworn to since the end of WWII. Now, make sure you don’t eat fat, you’ll get fat! And remember, small cars are the future, and we can end crime by banning weapons. Sure. I have a bridge to sell you in Brooklyn
Remember, Germany is intentionally de-industrializing. It’s part of their national ethos, to be extreme, I guess. So the people who are simply giving their heavy industry to China, India and the US are carping about the sky falling. But they’re still riding in trains, and cars and busses and taking planes all over so they can not tip.
Germans. Extreme, again
This “extreme” ethos of deindustrializing is not relegated to just Germany, most of Europe want to “green” their economies. Also, the competition from industry in other nations, plus high energy costs exacerbated by the sanctions against Russia and it’s energy supplies force some industries to relocate overseas. If you have some personal beef with the Germans, so be it. But environmental extremism is not unique to them.
Oh no! We’ve missed the deadline to save the Earth…AGAIN? Let me guess…We’ve only got 5 years left…AGAIN?
This is little more than a promotion for COP-30. It is full of assertions but few facts. The only really irreversible ‘tipping point’ in the long history of Earth was the Great Oxygenation Event more than 2 billion years ago. The Earth has recovered time and again from ‘ice house’ and ‘hot house’ events.
The first reef-building corals appeared nearly 500 million years ago (Ordovician Period) and have persisted to this day despite several times when the shallow seas were warmer than today. We are in what is called the Holocene Epoch; the Holocene Optimum was warmer than today and yet corals survived. This whole fact-free article consists of unsupported assertions with distractions provided by arm waving.
More like a tipping point for this narrative to finally fall apart.
I mean,even Greta has given up this charade for an ACTUAL worthy cause, that is freedom for Palestine.
“The collapse of the AMOC, which includes the Gulf Stream, COULD already occur at less than 2°C of global warming.”
Once again, undefined lawyer words are used to scare uncritical readers instead of providing justified estimates of the numeric probability and margin of error. All that the word “could” provides is a claim that something is not impossible. It says nothing about the probability other than implying that the probability is low.
Real or not I remain complacent about the issue because society’s leaders are proving they does not care. If they cared they’d recognize the pesky detail that all we can do to stop what they want us to believe is life threatening is stop burning things, get the carbon out of the air – resulting in fractions of a percent to single digit percents of remediation. All that will do is push off the inevitable a few months to a year or so. When they start actually budgeting projects to cope with the expected warming effects I might start taking the bozoids seriously. THEN the little bit we can achieve in reduced carbon dioxide emission might matter.
But, that’s OK. Nature is simply demonstrating what has seemed obvious to me for over half a century, intelligence is a species way of dying out.
{^_^}
Huh … it’s unfortunate that people don’t look out their windows more often – or go snorkeling, or simply read up on the research – THERE IS NO INCREASE IN THE MASS DIE OFF OF CORALS. Corals always have died off and then rebloomed again – this is constantly happening on the Great Barrier Reef and they have shown that there is no problem with corals as regards CO2
Planetary researchers have just figured out how jet streams work on other planets in our solar system, with new convection models linked to the equators. The climate modeling of Earth appears to be distorted for reasons other than what is observed!