Source: United Kingdom – Science Media Centre
A study published in Nature estimates global glacier melting from 2000 to 2023.
Prof Andrew Shepherd, Head of Department of Geography and Environmental Science, Northumbria University, said:
“This is really important as it’s an authoritative assessment from the community working on this topic. It confirms that the pace of glacier melting is accelerating over time. Glacier melting has two main impacts; it causes sea level rise and it disrupts the water supply in rivers that are fed by meltwater. Around 2 billion people depend on meltwater from glaciers and so their retreat is a big problem for society – it’s not just that we are losing them from our landscape, they are an important part of our daily lives.
“Even small amounts of sea level rise matter because it leads to more frequent coastal flooding. Every centimetre of sea level rise exposes another 2 million people to annual flooding somewhere on our planet.
“Community assessments like GLAMBIE are vital as they give people confidence to make use of their findings. That includes other climate scientists, governments, and industry, plus of course anyone who is concerned about the impacts of global warming. Around 2 billion people depend on meltwater from glaciers and so their retreat is a big problem for society – it’s not just that we are losing them from our landscape, they are an important part of our daily lives.”
Prof Martin Siegert, Professor of Geosciences and Deputy VC at the University of Exeter, said:
“Two centimetres might not sound a lot, but this is the contribution from small glaciers – not the whole of the ice on the planet, and not from Greenland and Antarctica. Sea level has risen by 20cm since 1850; 50% from the sea being warmer and expanding, 50% (10cm) due to glacier melt. However, ice sheets are now losing mass at increasing rates (6x more than 30 years ago), and when they change, we stop talking centimetres and start talking metres. For example, the last ice age was 20,000 years ago, and between then and 10,000 years ago as we warmed out of the ice age, sea level rose by 130m, due primarily to collapse of ice sheets.
“This research is concerning to us, because it predicts further glacier loss, which can be considered like a ‘canary in the coal mine’ for ice sheet reaction to global warming and far more sea level rise this century and beyond. The IPCC indicates 0.5-1m this century – but that is with a 66% certainty – hence 1/3 chance it could be higher under ‘strong’ warming, which unfortunately is the pathway we are on presently.”
‘Community estimate of global glacier mass changes from 2000 to 2023’ by The GlaMBIE Team was published in Nature at 16:15 UK time on Wednesday 19th February.
Declared interests
Prof Andrew Shepherd: No conflicts to declare
Prof Martin Siegert: No COI