Antarctica glacier is gone: sea level will rise by more than three meters



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Antarctica glacier is gone: sea level will rise by more than three meters

Sebastian Rosier, of University of Northumbria, said it: "Our study is the first to confirm that the Pine Island Glacier actually crosses these critical thresholds. Many different computer simulations around the world are attempting to quantify how climate changes could affect the West Antarctic ice sheet, but identifying whether a period of retreat in these models is a tipping point is a challenge.

However, it is a crucial question and the methodology we use in this new study makes it much easier to identify potential futures. turning points." The melting of the Pine Island glacier in Antarctica has become irreversible: the consequences for the whole world will be very serious with an expected sea rise of more than three meters in some places.

Pine Island Glacier and the nearby Thwaites Glacier are responsible for about 10% of the ongoing global sea level rise. The situation will inevitably lead to the collapse of the entire Antarctic ice sheet. Northumbria University researchers say long-term warming and scaling trends in circumpolar deep waters, combined with changes in wind patterns in the Amundsen Sea, could expose the Pine Island Glacier Ice Shelf to more water.

hot for longer periods of time, making temperature changes of this magnitude more and more likely.

Antarctica glacier is gone: sea level will rise by more than three meters

The study says: "This process may have already been activated in the Amundsen Sea region, where the Pine Island and Thwaites glaciers dominate the current mass loss from Antarctica, but modeling and observation techniques have not been able.

to establish this rigorously, leading to divergent views on the future mass loss of the West Antarctic ice sheet. Here, we aim to fill this knowledge gap by conducting a systematic investigation of the Pine Island glacier stability regime.

We show that early warning indicators in model simulations robustly detect the onset of sea ice sheet instability. We are therefore able to identify three distinct tipping points in response to increased ocean-induced melting.

The third and last event, triggered by an ocean warming of about 1.2 ∘ C from the steady-state model configuration, led to a retreat of the entire glacier that could trigger a collapse of the West Antarctic ice sheet. "