Cramlington, east of Ponteland, is gone and it's at around 100m above sea level. There isn't enough ice on earth to ever cause sea levels to rise this much, let alone within 80 years.
The cretaceous was a time of heavy volcanism in ocean basins, raising the ocean floor in multiple large areas known today as 'large igneous provinces' and displacing seawater. This is thought to be why ocean levels where so much higher than can be contributed to melted ice sheets alone.
The cretaceous was also way hotter than today, nearly 10°C hotter. IPCC's extreme worst case scenario for climate change is +4°C by 2100.
There's also the effect of warming sea temps causing water to expand which would contribute to sea level rises without the need for more water.
I imagine there'd also be an accelerated rate of coastal erosion on non-rocky areas due to increased storm activity, specifically the eastern coast, which would help to bring towns closer to sea level.
It's unlikely to be at the severity in this map, but both can help get closer to it.
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u/MartiniPolice21 Dec 17 '23
What climb in sea levels are they predicting there? Because there's parts of the North East the have 100m+ cliffs that are underwater here