5th July 2022
The Italian glacier collapse has brought fresh warnings of more to come as temperatures continue to rise. PlanetSKI examines the issues. NEW
Glaciers across the world have been melting at an alarming rate in recent years.
In the Alps they are estimated to have lost half their ice volume since 1850 and loss rates have accelerated sharply since the late 1980s.
In the Alps temperatures have increased by around 2C , that is twice the global average.
As glaciers recede they can become unstable and collapse.
The danger is heightened on steeper, high altitude slopes like on the Marmolada.
See here for our related and updated news article on the tragedy on Marmolada:
They rely on below zero temperatures to keep them in place.
When the temperatures rise they become unstable.
The melt water can seep down to the base of the glacier where it clings to the rock.
Many of the glaciers are constantly monitored and we have reported in the past on PlanetSKI of areas being evacuated.
However, it is a new and inexact science.
The Italian Prime Minister, Mario Draghi, said the incident on Marmolada was “without doubt” linked to climate change.
“This is a tragedy that certainly had an element of the unpredictable but is also without doubt linked to the deterioration of the environment and the climate situation,” said Mr Draghi.
He has visited the region and said the government would take measures to prevent another similar tragedy happening.
There is no real detail on what these measures might be.
Last winter saw 70% less snow than normal in the northern Italian mountains.
“Combined with the unusually high temperatures across the region over the summer, glaciers are melting fast,” said Professor Jonathan Bamber, director of the Glaciology Centre at the University of Bristol.
“The Marmolada glacier collapse is a natural disaster linked directly to climate change,” said Poul Christoffersen, professor in glaciology at the University of Cambridge.
“High elevation glaciers, such as the Marmolada, are often steep and relying on cold temperatures below zero degrees Celsius to keep them stable. But climate change means more and more meltwater.”
“Catastrophic glacier collapses such as this are becoming more frequent,” he added.
One measure being taken in places across the Alps is to cover glaciers, but this is impractical on any large scale
70m long strips of reflective material have been placed over the ice on the Pressena glacier in Italy to try to preserve it.
The tarpaulins were first used on the Presena glacier in 2008 after scientists observed that the glacier in the Italian Alps had lost 70% of its volume in the previous 15 years.
It is now claimed that up to 70% of the snow and ice is saved each summer as the sun’s rays are reflected away.
Scientists first covered 30,000 sq metres when the project began and now 100,000 sq metres is under wraps.
Other glaciers in the Alps have also been covered with some limited success.