by Brouse and Mukherjee
Tipping points are Critical Milestones that directly impact the rate of acceleration in climate change by multiplying the number and intensity of feedback loops.
Push a glass toward the edge of a table and eventually it will fall off on its own. No matter how slowly or meticulously you push… no matter how you weight or fill the glass, it will reach a tipping point and fall off before being pushed completely off the table. No matter whether you believe the glass is half-empty or half-full, when the tipping point is reached it will plummet out-of-control to its end. This is science not fate, faith, nor belief. Human induced climate change has resulted in environmental tipping points being breached.
Tipping points, when crossed, trigger self-sustaining feedback loops that are no longer dependent on human activity. Similar to when a domino topples over hitting two more dominoes that in turn fall hitting more dominoes. Thus, the name The Domino Effect. It can also be visualized as The Snowball Effect. A tipping point is like a snowball rolling down a hill growing in mass and velocity (momentum). When a tipping point is crossed, it results in cumulative and reinforced global warming.
A look at five (5) of the multiple tipping points that show the proverbial snowball is already rolling. The first dominoes have fallen and will continue to knock down more tiles with each escalating step.
- Mountain Glacier Loss
- Greenland Ice Sheet Collapse
- Antarctic Ice Sheet Collapse
- Collapse of AMOC (Atlantic Meridional Overturning Circulation)
- Amazon Rainforest Dieback
Crossing even a single tipping point is alarming. For instance, crossing the tipping point for ‘mountain glacier loss‘ has immediate consequences: millions of people in Europe will be impacted by the lack of fresh water. Billions of people that live along coasts will be impacted by the saline infiltration and eventually by the submerging of their property. In September of 2022, UNESCO reported accelerated melting of glaciers in World Heritage sites, with glaciers in a third of sites set to disappear by 2050. In September of 2023, the GLAMOS glacier monitoring center found 10% of Swiss glaciers had disappeared in the last 2 years. They do not expect any Swiss glaciers will be left by 2050 no matter what actions are taken. If extreme measures are taken, they anticipate we may be able to save some polar glaciers.
This in and of itself should be alarming; however, it gets worse. Tipping points are parts of feedback loop systems. The ice-albedo feedback loop is an expression of the ability of surfaces to reflect sunlight (heat from the sun). Any loss of ice over a darker surface means the surface will absorb more heat and reflect less heat. This process makes the Earth warmer causing more loss of ice, which in turn causes more warming of the Earth. So, yes, the mountain ice tipping point is quite alarming for both its immediate impact as well as its self-sustaining growth to global warming; but wait, it gets more alarming. The increasing temperatures due to crossing a tipping point cause other tipping points to be toppled (The Domino Effect).
By the Autumn of 2023, it had become evident the West Antarctic and Greenland ice sheets will completely melt. The process is irreversible and inevitable. The cool water from the melting ice at the poles is being drawn toward the center of the Earth and getting warmed to record high temperatures. The warm, moist air is circulating and moving over land. These changes in climate systems will cause other areas to experience unprecedented drought. We expect sea level rise will total about 270 feet over the next several millennia. It is episodic, and in the fast bits it can go up 3 feet every twenty years for five hundred years. The melting Arctic and Antarctic have multiple feedback loops including: enhanced oceanic heating and ice-albedo, Planck feedback, lapse-rate feedback, and cloud feedback.
The tipping point for the collapse of AMOC (Atlantic Meridional Overturning Circulation) was thought to be centuries away, at the earliest. In July of 2023, the study Warning of a forthcoming collapse of the Atlantic meridional overturning circulation was published in the journal Nature Communications. “Here we provide statistical significance and data-driven estimators for the time of tipping. We estimate a collapse of the AMOC to occur around mid-century (2025-2095) under the current scenario of future emissions.” The collapse is likely to cause faster sea level rise on the east coast of the US, more severe storms in Europe, and increasing drought in the Sahel in Africa. “From the study of past climate, we know changes in the AMOC have been some of the most abrupt and impactful events in the history of climate,” said Prof. Stefan Rahmstorf, at the Potsdam Institute for Climate Impact Research in Germany and world leading oceanographer. During the last Ice Age, winter temperatures changed by up to 10C within three years in some places. “We are dealing with a system that in some aspects is highly non-linear, so fiddling with it is very dangerous, because you may well trigger some surprises,” he said. “I wish I knew where this critical tipping point is, but that is unfortunately just what we don’t know. We should avoid disrupting the AMOC at all costs. It is one more reason why we should stop global warming as soon as possible.” A feedback loop created by the AMOC tipping point would cause a disruption of weather systems and circulation. The result would be the loss of naturally occurring carbon sinks. One scenario is desertification of the Amazon rainforest. In 2023, the Amazon River and the Rio Negro set record low levels.
The tipping point / feedback loop problem is very complex (chaos theory) and exponentially alarming. Yet another tipping point appears to have been triggered before 2024 — Amazon Rainforest Dieback. The Amazon is often referred to as ‘the lungs of our planet.’ Not only does the Amazon suck in huge quantities of CO2 and breath out O2, but the Amazon soils also store huge amounts of CO2. The desertification of the Amazon would result in a release of the carbon as the soils disappeared.
1) part of July was spent at record temperatures +3C
2) the collapse of the Amazon rainforest is likely to happen between +2 – 4C. The collapse of the Amazon is expected to occur because of changing weather patterns and circulation that result in drought.
3) Brazil set up a task force for “unprecedented drought in the Amazon”
Low river levels and hotter waters have killed masses of fish seen floating on river surfaces, contaminating the drinking water, Environment Minister Marina Silva said. “We have a very worrying situation. This record drought has disrupted river transport routes (dropping 30 cm / day) threatening food and water shortages, and a large fish mortality is already beginning.” This was the effect of a periodic El Nino mixing with changes in weather patterns brought by global warming. “We are seeing a collision of two phenomena, one natural which is El Nino and the other a phenomenon produced by humans, which is the change in the Earth’s temperature.” Worsened by climate change, this combination has caused drought not seen before in the Amazon and “is incomparably stronger and could happen more frequently.”
The average temperature for Brazil had been above the historical average from July through October of 2023. Rio de Janeiro recorded 42.5C on November 12, 2023 (a record for November) and high humidity on the 14th meant that it felt like 58.5C, municipal authorities said. Deadly humid heat is the greatest short term climate change risk to human health. On November 17, “a young Brazilian fan of US singer Taylor Swift died in Rio de Janeiro after falling ill inside the sweltering stadium where the superstar’s concert was held, amid a record-breaking heatwave across large swathes of Brazil,” as reported by ABC. “The show took place on the same day that Rio recorded its highest-ever heat index reading, which combines temperature and humidity, at 59.3 degrees Celsius (139 degrees Fahrenheit).”
Conclusion
Feedback loops and tipping points are parts of an equation that determine the rate of acceleration in climate change. Triggering these tipping points results in the CO2 stored in nature to be released without the assistance of humans. Though we do not know how much carbon is stored in nature, it would be reasonable to assume that the temperature could be pushed from 3 degrees to 6 degrees above pre-industrial levels. Humans cannot thrive above a rise of 1.5 degrees. Much of the Earth will be uninhabitable if the temperature rises an additional 6 degrees Celsius. If humans also add 3 degrees Celsius, the temperature and humidity will approach a wet-bulb temperature that will not sustain human life.
For the first time in human history, global warming is going to continue no matter what humans do. Even if humans stopped their greenhouse gas emissions today, humans have invoked nature’s greenhouse gas emissions. Nevertheless, the sooner humans stop their emissions, the better. In addition, humans must adapt their habitat to remove, reduce, and hinder nature’s greenhouse gas emissions.
What Can I Do?
There are plenty of things you can do to help save the planet. Stop using fossil fuels. Consume less. Love more. Here is a list of additional actions you can take.