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by photochemsyn
1389 days ago
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It all depends on how long you want to wait. Last time CO2 levels were as high as today was the mid-Pliocene, with temperatures estimated 2-3C higher than today and sea levels estimated 16 meters higher than today. A slow steady melt of Greenland and West Antarctica would take hundreds or thousands of years: > "We acknowledge that this sea-level rise would not happen overnight. It would take hundreds to thousands of years to melt such large amounts of ice. Another important finding of our study is that, under temperatures ~4 °C higher than pre-industrial values and elevated CO2 during Pliocene Climatic Optimum, the global mean sea level reached 23.5 m (with an uncertainty range of 9.0-26.7 m) higher than present. This indicates that significantly more ice will melt if temperatures stabilize at this level. This estimate can serve as a target for future ice sheet model calibrations." https://thesciencebreaker.org/breaks/earth-space/pliocene-se... This particular article seems to point to 2-3 meter sea level rise by 2100, which looks to be on the higher end of what NOAA puts on their website as the 'observed trend', which looks more like a 1-3 ft sea level rise estimate by 2100. According to their graphics, by 2030 or 2040 it should be more clear which way things are really going, real-world evidence wise. https://www.climate.gov/news-features/understanding-climate/... |
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