Question: Isn't some of what people are talking about just shoreline erosion, as opposed to sea-level rise?Yes, and I have very nice pictures of it. If you have a coast, with some stability of the sea level, the waves make a kind of equilibrium profile—what they are transporting into the sea and what they are transporting onshore. If the sea rises a little, yes, it attacks, but the attack is not so vigorous. On the other hand, if the sea goes down, it is eating away at the old equilibrium level. There is a much larger redistribution of sand.
We had an island, where there was heavy erosion, everything was falling into the sea, trees and so on. But if you looked at what happened: The sand which disappeared there, if the sea level had gone up, that sand would have been placed higher, on top of the previous land. But it is being placed below the previous beach. We can see the previous beach, and it is 20-30 cm above the current beach. So this is erosion because the sea level fell, not because the sea level rose. And it is more common that erosion is caused by a falling sea level, than by a rising sea level.