I don't know about Dublin, but I've seen similar stories about Miami and Manhattan. Knowing something about the construction of those cities (like most large coastal cities) they use land fill to expand the cities. It is impossible to have a historical measurement of tides because the measurement location has to be moved every time city expands. (It's really interesting to take a look at old maps of cities and compare them to present day maps.)
I have yet to get a straight answer than makes any scientific sense from a global warming nut job. Their thinking ends with glaciers melt and that causes sea level rise, as if glaciers melting is abnormal or something. It's part of their definition. Glaciers are supposed to melt, and became glaciers at the end of the last ice age when they began to melt. Prior to that it was just snow and ice pack.
Right; I live by a river that at high tide is brackish (salt water comes in from the ocean) - and the water level hasn’t risen. Construction goes on along the river as though it never will rise, and often this is in areas that were inundated by Hurricane Sandy.
To show the coastline of the colony in 1776 and as part of the Bi-Centennial celebration, a double line, green (land) and blue (water) had been painted through the streets of lower Manhattan