by Daniel Brouse
We’re crossing 1.5°C in a hurry—and tipping points are beginning to topple.
This is where tipping points get your attention: you can actually observe them.
Climate change is not a smooth, linear progression. As thresholds are crossed, individual tipping elements can begin interacting with one another. Feedbacks can couple across the Earth system, changes can propagate faster, and the acceleration of change can itself increase.
What once looked like gradual change can suddenly become a rapidly evolving cascade.
HISTORICAL OBSERVATION
When the last Ice Age ended, Earth experienced “Meltwater Pulse 1A”—a dramatic period roughly 14,500 years ago when sea levels surged upward by about 66 feet over approximately 500 years. Geological evidence from Barbados, Tahiti, and Sunda indicates that sea-level rise reached astonishing rates, sometimes exceeding 40 mm per year.
The lesson from the paleoclimate record is not that history will repeat itself exactly, but that the Earth system is capable of producing rapid, nonlinear changes when large stores of ice and water cross critical thresholds.
OBSERVE CASCADING TIPPING POINTS TODAY
For the last 40 years, sea-level rise has increased from roughly a millimeter to several millimeters per year. People often respond, “So what? What difference does a few millimeters a year make?”
But a sudden-release event is fundamentally different from 40 years of gradually melting ice.
Large volumes of meltwater can be temporarily stored or dammed behind and beneath glaciers, creating the potential for abrupt releases when a critical threshold is crossed.
DICKSON FJORD — GREENLAND
In 2023, a massive rock-and-ice avalanche involving approximately 25 million cubic meters of material plunged into Dickson Fjord and generated a seiche that produced seismic signals detectable around the world for nine days.
This wasn’t simply ice melting.
It was a sudden gravitational release from a destabilized mountain system.
NEPAL–TIBET
A massive ice-and-rock avalanche generated its own seismic signature.
Seismic analysis indicates that the shaking was not an earthquake that triggered the landslide. Rather, the enormous mass movement itself generated seismic waves equivalent to those associated with a magnitude 4.4–5.2 earthquake.
A huge section of glacier reportedly detached from roughly 5,200 meters (17,000 feet) near Langtang Lirung, fragmented during its descent, and transformed into an extraordinarily mobile mixture of ice, water, rock, sediment, boulders, and trees.
This is the critical distinction.
We aren’t simply watching glaciers melt.
We are watching a destabilizing Earth system capable of producing sudden releases, massive gravitational failures, seismic energy, debris flows, river blockages, and catastrophic floods.
The concern is not that every tipping point suddenly collapses at once.
The concern is that tipping points can couple.
One failure can increase stress on another system.
Another threshold is crossed.
Another feedback activates.
The cascade accelerates.
THAT IS THE CLIMATE CHANGE AVALANCHE.
Slow → Accelerating → Tipping → Cascading → Rapidly Changing
Cascading tipping points are now observable in real time.
As we continue to race past 1.5°C, expect to see many more events like these as climate-driven changes increasingly interact with already destabilized Earth systems.