Although the world’s attention is focused on controlling the new coronavirus pandemic, a new study by researchers at Harvard University has found that due to climate change, sea water levels rise faster than people think. The study, published in Science Advances, stated that the global sea level rise caused by the possible collapse of the West Antarctic ice sheet may be underestimated. According to this study, if the western Antarctic ice sheet collapses, the global sea level may rise by about 3.2 meters (more than 10 feet).
Scientists say that this study uses a new calculation method for drainage mechanism. This phenomenon occurs when the solid bedrock (the bedrock where the West Antarctic ice sheet is located) rebounds from the solid Antarctic upwards after the ice melts, resulting in a reduction in the total weight of the ice sheet. According to the predictions of this new study, if the ice sheet collapses completely, the estimated value of global sea level rise will increase by another meter within 1,000 years.
In a statement, Linda Pan, a PhD in Earth and Planetary Sciences at GSAS, and graduate student Evelyn Powell co-led the research. He said that the magnitude of this impact shocked them and supplemented previous research that the mechanism will It is regarded as “insignificant”.
Powell said: “If the West Antarctic ice sheet collapses, the most widely quoted estimate that will cause the global average sea level to rise is 3.2 meters. We have proven that the drainage mechanism will add an additional water meter, which accounts for 30% of the total.”
Simulations by Pan and Powell indicate that the global sea level rise caused by the melting of the western Antarctic ice sheet will increase by 20% by the end of this century through drainage mechanisms.
Rising sea levels threaten island nations and coastal cities, which provide shelter for more than 2 billion people worldwide.
Jerry X. Mitrovica, Professor of Science in the Department of Earth and Planetary Sciences, Frank B. Baird (Frank B. Because of Pan and Powell’s latest research. “One for each.”
The two researchers were working on another sea-level change project, but after they discovered that the West Antarctic ice sheet was discharging more water than expected, they transferred energy to the project.
Pan said that no matter under what circumstances they have used the collapse of the western Antarctic ice sheet, they always found an extra meter of global sea level rise.
Pan said: “When the ice stops melting, the sea level will not stop rising.” “Our destruction of the coastline will continue for centuries.”