8/2/2023 0 Comments Fractured sapphirefoxx free![]() ![]() This "bottom water" spreads away from Antarctica to reach the northern hemisphere.ĭistribution of anomalies in Antarctic fast-ice extent in early-mid March 2022. The "overturning" circulation begins in Antarctica when very salty, dense brine (created as the ice forms) sinks to the bottom of the ocean. If this trend persists, the consequences for the climate and for Southern Ocean ecosystems could be catastrophic.Īntarctic sea ice drives the circulation of the world's oceans. Much of the ice lost in 2022 had been present since 2000, when high-quality records began. That's well below the normal March range of 168,600–295,200 square km. Our deeper analysis of satellite images reveals landfast sea ice extent declined to a record low of just 123,200 square km in March 2022. Satellites can easily estimate the horizontal extent of sea ice, but determining the type of ice is far more difficult. And it's crucial habitat for Weddell seals and emperor penguins. It acts like a belt around the Antarctic coast, regulating the flow of ice shelves and glaciers into the sea. ![]() ![]() Landfast ice is frozen seawater that is fastened to the coast. Our new research is the first to review the many crucial roles of "landfast" sea ice around Antarctica. ![]()
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