Global warming is making events like this more likely. And as more and more ice shelves around Antarctica collapse, ice loss will increase, and with it global sea levels.
East Antarctica’s Conger ice shelf—a floating platform the size of Rome—broke off the continent on March 15, 2022. Since the beginning of satellite observations in the 1970s, the tip of the shelf had been disintegrating into icebergs in a series of what glaciologists call calving events.
The world’s largest ice shelves fringe Antarctica, extending its ice sheet into the frigid Southern Ocean. Smaller ice shelves are found where continental ice meets the sea in Greenland, northern Canada and the Russian Arctic. By restraining how much the grounded ice flows upstream, they can control the loss of ice from the interior of the sheet into the ocean.
Along the Antarctic Peninsula, the whip-like land mass which extends from the West Antarctic mainland, these include Prince Gustav ice shelf , Larsen A ice shelf , Larsen B , and Wilkins ice shelf . In East Antarctica, where Conger once was, Cook ice Shelf was partially lost in the 1970s. Taken together, this series of collapses suggests that some underlying environmental conditions, such as ocean and atmosphere temperatures, are changing.
The consequences of the Conger ice shelf collapse are unlikely to be of global significance as the catchment area feeding ice into the former shelf is small. And due to its shape, the Conger ice shelf was most likely not a significant buttress to the flow of ice upstream.
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