In the last few weeks, the Perito Moreno Glacier has experienced massive ice calving events, both at its front facing Lake Argentino and at its subaqueous base, known as basal calving.
Tour guides, park rangers, and local photographers have expressed concern upon noticing abrupt changes in the glacier’s structure.
Visual Impact and Evidence of Retreat
Today, the unease has heightened upon observing a large cavity on the north face of the glacier, where frontal and basal calving events had been reported days earlier.
According to the Los Glaciares National Park guide, the differences with images taken the previous month are remarkable, showing clear evidence of erosion.
A Lost Balance: The Retreat of the Perito Moreno Glacier
The Perito Moreno Glacier, which had remained in equilibrium for years, has entered a phase of accelerated mass loss.
Scientific data indicates that:
- It loses an average of 8 meters in height per year.
- It retreats and thins, weakening its resistance to the pressure of the lake water.
- Its mass balance is negative, losing more ice than is formed by snowfall.
Monitoring with Drones to Analyze the Phenomenon
Given the risk of an acceleration in retreat, specialists from Los Glaciares National Park will conduct a survey using drones to capture images to be evaluated by glaciologist Pedro Skvarca.
This monitoring is key to:
- Record the progress of erosion.
- Evaluate its behavior in the short, medium, and long term.
- Determine when the glacier could lose its anchorage with the rocky bed, further accelerating its retreat.
An Uncertain Future for a Natural Icon
Scientists agree that if the Perito Moreno loses its anchorage, its retreat could quickly intensify, following the same pattern as other glaciers in the region, such as Upsala and Viedma.
The situation highlights the importance of continuous monitoring and reinforces concerns about the effects of climate change on glacier stability.
