[Cincinatus]

The zero-point of the sea, meticulously established on a small cliff on an island (The Isle of the Dead) off the southeast coast of Australia in 1841, shows that the ocean level has lowered by about 30 cm (about a foot) since 1841.

You can't use one data point to establish mean sea level over time -- the land could be rising, rather than the sea falling. You need to have many dozens of localities around the world to establish this by such a technique.

[nightdriver]

"You can't use one data point to establish mean sea level over time..."

Very true, I agree.

But at least this one IS a data point, and it would seem to contradict the Chicken Littles that continuously harp about innundation by the oceans.

[cogitator]

You need to have many dozens of localities around the world to establish this by such a technique.

Or satellite radar altimetry, which measures sea level at thousands of points on the ocean surface, and then calculates sea level rise over time.