GeoSpace reports on a detailed look at Boston tide records - which date back to the 1825 - and which show that the sea level in Boston Harbor is rising.
The study found that Boston is uniquely vulnerable to sea-level rise because the land is sinking slightly due to after effects of the last period of glaciation. And while a sun/moon cycle means slightly less risk of catastrophic flooding in the 2020s, all things being equal, it will mean more of a risk in the 2030s, even without taking into effect the increased severity of storms due to climate change.
Using newly-discovered archival measurements to construct an instrumental record of water levels and storm tides in Boston since 1825, researchers report that local averaged relative sea level rose by nearly a foot (0.28 meters) over the past 200 years, with the greatest increase occurring since 1920. The work also highlights tides and their significant effect on flooding in the city.