The sign reads:
SEA LEVEL RISING TIDE MARKERS
The nearby marker in the water shows the highest local tide levels for the years 1920, 2006 and the anticipated 2050 level.*
Ashfield Council has installed these markers to show the effect of climate change on local sea levels.
* Source: IPCC Third Assessment Report - "Climate CHnage 2001: The Scientific Basis".
WHAT YOU CAN DO TO REDUCE THE EFFECTS OF CLIMATE CHANGE
- Hang yourself (I put that one in there)
- Walk, cycle of catch publc transport and leave your car at home
- More depressing crap that I will not bore you with
The photo below shows a marker.
Here is another one by the side of the rowing club.
I wonder why these chose the high tide level in 1920? Could it possibly be that 1920 is the lowest high tide on record, thus making the increase look scarily large?