The Impact of Rising Sea Levels and Storm Surges - Malcolm Bowman
1. The Impact of Rising Sea Levels
and Storm Surges in the New
York - New Jersey Metropolitan
Area: Sandy and Post Sandy
Malcolm Bowman
School of Marine & Atmospheric
Sciences
State University of New York
Stony Brook
7. Courtesy Regional Plan Association
Welcoming but dangerous approaches to New York Harbor –
especially in sailing ship days. There’s Bill’s lightship LTV-612!
8. New York Harbor has two tidal
entrances – Verrazano Narrows
and the East River – and two
avenues for storm surges!
9. Measured sea level rise at The
Battery NYC since 1855. Slow,
steady, about 3 mm/yr or 1 ft/century.
Expected to accelerate in the
decades ahead.
26. Summary
•Metropolitan New York is particularly vulnerable to flooding
due to its geographic location and low relief.
•Devastating storm surges are nothing new – but they are
expected to increase in intensity, perhaps not in frequency.
•Although a Category 3 or 4 hurricane is highly unlikely at our
latitude, we must be prepared for the worst.
•Sea level rise is slow, but insidious, expected to accelerate.
NY State has declared an “official” sea level rise of up to 6 ft
by 2100.
•Storm surges, sea level rise and astronomical high tides are
additive.
•New York Harbor’s unique configuration makes it amenable to
cost-effective protective measures to protect the region from
Nature’s worst attacks for at least 100 years.