The United Nations weather agency is reporting that glaciers shrank more than ever from 2011 and 2020 and the Antarctic ice sheet lost 75 percent more compared to the previous ten years, as it released its latest stark report about the fallout on the planet from climate change.
The World Meteorological Organization served up more evidence of what scientists already know – the Earth is heating – on Tuesday, but this time looking at the trend over a longer period with its latest Decadal State of the Climate report.
“Each decade since the 1990s has been warmer than the previous one and we see no immediate sign of this trend reversing,” its secretary-general, Petteri Taalas, said. “We are losing the race to save our melting glaciers and ice sheets.”
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Warming oceans and melting of ice sheets caused the rate of sea-level rise to nearly double in less than a generation, he said, and WMO says that bodes ill for low-lying coastal regions and countries.
Experts are divided about one of the most important metrics: The rate of warming.
Former NASA top scientist James Hansen, nicknamed the Godfather of Global Warming for his early warnings, has reported that the rate is accelerating. University of Pennsylvania climate scientist Michael Mann has argued warming has been steadily increasing since 1990, but isn't speeding up.
“The surface of the planet and the oceans both continue to warm at a steady rate, not an accelerating rate, and that’s bad enough,” Mann said in an email. He warned that such warming is fueling increasingly dangerous extreme weather events, coastal flooding and many other “disastrous” impacts.
“And the warming and its consequences will continue as long as we continue to generate carbon pollution through fossil fuel burning and other activities, highlighting the critical need for progress at the COP28 climate summit in Dubai taking place right now,” he wrote.
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The WMO report said that glaciers measured around the world thinned by roughly one meter (about 3 feet) per year on average from 2011 to 2020, and a look at over 40 “reference glaciers” showed the lowest mass balances of any decade.
“The remaining glaciers near the Equator are generally in rapid decline. Glaciers in Papua, Indonesia are likely to disappear altogether within the next decade,” WMO said. “In Africa, glaciers on the Rwenzori Mountains and Mount Kenya are projected to disappear by 2030, and those on Kilimanjaro by 2040.”
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As for the ice-sheet thaw, Greenland and Antarctica lost 38% more ice from 2011 to 2020 than in the previous decade. It also said that sea level rise has accelerated during the decade because of the melting.