A sea in Russia’s Arctic known as the “birthplace of ice” could break ice melt records for a second consecutive year in 2021, climatologist Zachary Labe of Colorado State University tweeted Tuesday.
In 2020 the Laptev Sea stayed ice-free until November for the first time in documented history. The sea, which plays a crucial role in generating ice coverage for the entire Arctic, has broken another record with its annual ice melt starting earlier in the spring than ever before.
“We are off to a record-breaking start to the sea ice melt season in the Laptev Sea (again),” Labe tweeted, citing data from the U.S. National Snow & Ice Data Center (NSIDC).
The ice-free season in the Laptev Sea, located between the Kara and East Siberian seas, has grown longer in recent decades, a pattern that is likely to continue for the rest of the century, Labe told The Guardian in October.
If the Laptev Sea’s ice-free season continues to get longer, newly formed sea ice will not be able to spread to other parts of the Arctic Ocean before another melting season starts, threatening the region’s ecosystem, scientists say. A loss of ice from the Laptev Sea could also cause ice in other regions to melt faster by exposing more dark ocean surface to sunlight and creating a feedback loop of accelerating warming.
The latest record comes amid a series of abnormal heatwaves and extreme weather events like wildfires and droughts in Siberia and the Arctic that have been linked to climate change. During last month’s heatwave along Russia’s Arctic coast, the shores of the Barents Sea saw hotter temperatures than beaches in Italy and southern France.