Listen again · In Conversation
Swiss glaciers lose almost one-fifth of their ice in five years October 2, 2026 · 7:09 · Science and the planet · With Maya and Nora
Switzerland has lost 19.4 percent of its glacier ice since 2021. That is almost one-fifth of the country’s glacier ice. The loss matters because glaciers store water and release it gradually.
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Maya This is Slow English FM, with Science and the planet. Maya here. Nora covers science and the environment. Thanks for listening. Maya Switzerland has lost 19.4 percent of its glacier ice since 2021. That is almost one-fifth of the country’s glacier ice. The loss matters because glaciers store water and release it gradually. Nora, what happened during 2026? Nora The Guardian reports that Swiss glaciers lost 5.5 percent of their ice during the first eight months of 2026. That followed a winter with little snow and a summer marked by intense heatwaves. The 5.5 percent loss brought the total decline since 2021 to 19.4 percent. The BBC describes 2026 as a disastrous year of ice loss. Maya Those are two different time periods. Can you explain the difference clearly? Nora The 5.5 percent figure covers the first eight months of 2026. The 19.4 percent figure covers the total decline since 2021. So one number describes a single period in 2026, while the other describes the loss accumulated over several years. The Guardian says the 2026 reduction came close to the record set in 2022. Maya What did the monitoring reports show about the physical change in the glaciers? Nora The Guardian reports that the Swiss Glacier Monitoring Network and the Swiss Commission for Cryosphere Observation found that individual glaciers became, on average, between 2.5 and 4 meters thinner in 2026. The same report says that some small glaciers disappeared. It also describes ice collapse from internal water channels beneath the surface. Maya Let us stay with that last point. What does the report actually tell us about the internal water channels? Nora The report describes ice collapse linked to water channels beneath the surface. It presents this as part of the observed glacier loss, alongside the wider reduction in ice. The important distinction is that the report does not describe only a glacier edge moving backward. It also records collapse within the ice. Maya Why does this matter beyond the appearance of the mountains? Nora The Guardian reports that glaciers store water and release it gradually as they melt. It says rapid ice loss can change water availability for communities and ecosystems that depend on meltwater. The BBC says the rapid melting could threaten water supplies. These reports connect the physical loss of ice with a possible change in an important water source. Maya Does rapid melting simply mean that more water is available for people in the short term? Nora The reporting does not support such a simple conclusion. The Guardian says rapid ice loss can change water availability. It does not describe one identical result for every community or ecosystem. What the reports establish is that the amount and timing of meltwater can be affected as the glacier ice reserve becomes smaller. Maya What weather conditions were linked to the large loss in 2026? Nora The Guardian reports a winter with little snow, followed by a summer with intense heatwaves. It also reports that Switzerland’s summer half-year, from April through September, was the hottest and driest since records began in 1864. Those conditions formed the weather context for the reported ice loss. Maya How does this Swiss result fit into the wider climate picture? Nora The Guardian reports that Alpine regions in Europe are experiencing extreme glacier collapse because of the heat-trapping effects of fossil fuel pollution. It also says Europe is warming faster than the global average, with Alpine regions among the areas experiencing especially rapid glacier change. The BBC reports that scientists say rapid melting is no longer surprising given the pace of climate change. Maya So is the Swiss loss being presented as an isolated event, or as part of a broader pattern? Nora The Guardian places the Swiss figures within wider glacier change in Europe’s Alpine regions. The BBC links the rapid melting to the pace of climate change. Taken together, those reports present the Swiss loss as part of a broader pattern of rapid glacier change. That is an interpretation of the reported context, rather than a claim that every glacier is changing in exactly the same way. Maya The phrase “almost one-fifth” is striking. What should listeners take from that figure, without losing the detail behind it? Nora The precise figure is 19.4 percent since 2021, according to The Guardian. It describes the total loss of Swiss glacier ice over that period. The separate 5.5 percent figure describes the first eight months of 2026. Together, the figures show both a major loss in one year and a much larger cumulative decline since 2021. Maya Can the available reporting give a timetable for what will happen to every glacier or every water supply? Nora No single timetable is given in the supplied reporting. The reports describe measured losses, including glaciers becoming 2.5 to 4 meters thinner on average in 2026 and some small glaciers disappearing. They also describe possible effects on water availability. The evidence supports concern about shrinking glacier ice and changing meltwater supplies, but it does not give one forecast for every glacier or community. Maya What is the clearest conclusion from these findings? Nora The clearest conclusion is that Swiss glaciers experienced a very large loss of ice in 2026, after a winter with little snow and a summer with intense heatwaves. The total loss since 2021 reached 19.4 percent. The reporting also shows why the change matters: glaciers are a source of gradually released water, and rapid ice loss can affect water availability for communities and ecosystems that depend on meltwater. Maya That was Science and the planet on Slow English FM. Thanks for listening. Goodbye.
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