Key Takeaways:
- A new international study suggests that thousands of glaciers in Canada’s Arctic could be saved from extinction if global warming is reduced to 1.5 degrees Celsius.
- The study estimates that 80% of the world’s glaciers could be lost by the end of the century if the current rate of warming continues.
- The loss of glaciers could have significant impacts on communities that depend on glacier meltwater, as well as cultural and spiritual landmarks.
- The study highlights the importance of reducing greenhouse gas emissions to mitigate the effects of climate change on glaciers.
- The researchers used a new term, "peak glacier extinction," to describe the year when the largest number of glaciers are expected to disappear.
Introduction to Glacier Extinction
A recent study published in Nature Climate Change suggests that thousands of glaciers in Canada’s Arctic could be saved from extinction if humanity can reduce global warming to 1.5 degrees Celsius. However, the study also presents a grim outlook for the world’s glaciers, estimating that close to 80% could be lost by the end of the century if the current rate of warming continues. The study, led by a team of researchers from Switzerland, modeled glacier extinction levels under four different warming scenarios and found that the vast majority of glaciers in Western Canada and the United States would be wiped out if the world continues on its current trajectory.
The Impact of Warming Scenarios
The researchers simulated the evolution of over 200,000 glaciers outside of Antarctica and Greenland, using three different models to estimate the moment each glacier would become too small to be classified as a glacier. The study found that at 1.5 degrees of warming, about 2,000 glaciers would disappear every year at a peak around 2041. In contrast, at four degrees of warming, the peak would shift to the mid-2050s and intensify to around 4,000 glaciers per year. The study also found that at the world’s current trajectory of 2.7 degrees, 60% of the region’s 7,406 glaciers in Canada’s southern Arctic would be wiped out by the end of the century.
The Importance of Glacier Preservation
The researchers emphasize that the loss of glaciers is not just a scientific concern, but also a cultural and spiritual issue. Glaciers are not only important water resources, but also influential cultural and spiritual landmarks and important tourism sites. The study highlights the importance of preserving glaciers, not just for their scientific value, but also for their cultural and spiritual significance. As co-author Matthias Huss noted, "The loss of glaciers that we are speaking about here is more than just a scientific concern. It really touches our hearts, and therefore it can spread a very powerful message also to a broader public."
Regional Variations in Glacier Extinction
The study found that the projected losses of glaciers vary significantly across different regions. In Canada’s southern Arctic, 60% of the region’s glaciers would be wiped out by the end of the century if the world continues at its current pace. In contrast, in the northern Arctic, the projected losses are less dramatic, with about 30% of the region’s 4,500 glaciers expected to vanish at the world’s current trajectory. In Western Canada and the United States, the outlook is far worse, with 96% of the region’s 17,723 glaciers expected to disappear at the world’s current trajectory.
Conclusion and Call to Action
The study highlights the urgent need to reduce greenhouse gas emissions to mitigate the effects of climate change on glaciers. The researchers emphasize that every fraction of a degree of warming will be important to avoid worsening climate impacts. The study suggests that if warming is kept to 1.5 degrees, thousands of glaciers in Canada’s Arctic could be saved from extinction. However, if the world continues on its current trajectory, the consequences for glaciers and the communities that depend on them will be severe. As the researchers note, the loss of glaciers is not just a scientific concern, but a cultural and spiritual issue that requires immediate attention and action.