US Coastal Cities Are Warned Of Daily High Tide Floods

US Coastal Cities Are Warned Of Daily High Tide Floods

Scientists report that many cities near the coasts of the US should prepare for daily flooding at high tide by mid-century because of rising sea levels.

Oceanographers have just identified the US coastal regions likely to experience 30 days or more of “nuisance” flooding every year. And the answer is that most of the American coast will experience high waters that are 30-60 cms above local high tides, at least 30 times a year.

Nuisance flooding means just that − somewhere between an inconvenience and modest damage. But climate change, and its attendant sea-level rise, will make them much more frequent, and possibly more damaging.

William Sweet and Joseph Park, scientists at the National Oceanic and Atmospheric Administration (NOAA), report in the journal Earth’s Future that sea level rise has accelerated from 1.7mm a year in the last century to 3.2mm a year in the last two decades, and flooding events that were once extreme could become the mean.

The oceanographers wanted to establish what they call “regional tipping points” – places where extra high waters would wash across streets and promenades normally above water and start to do so frequently.

Detailed Picture

New York was inundated when Superstorm Sandy hit the city in 2012, and studies have repeatedly warned that coastal inundations will cost communities colossal sums each year by 2050, and even more by 2100. Nor is the US alone in this respect. There have been ominous calculations for the UK as well.

The NOAA scientists add detail to the big picture. They started with the projections for global sea level rise delivered by the Intergovernmental Panel on Climate Change and then included the more local factors such as land subsidence or settlement, and cyclic weather patterns that exacerbate the tidal highs. Such floods have already increased, and are now five to 10 times more likely than 50 years ago.

They looked at all those tidal stations with a continuous 50-year record of measurement. This does not include the city of Miami, where the tide stations were destroyed in 1992 by Hurricane Andrew.

Coastal Changes

And they warn that Boston, New York City, Philadelphia, Baltimore and many other places along the Atlantic Coast, Galveston and Port Isabel in the Gulf of Mexico, and San Francisco Bay and San Diego along the Pacific Coast will all see a lot more seawater in city streets.

“Coastal communities are beginning to experience sunny-day nuisance flooding, much more so than in decades past,” said Dr Sweet. “This is due to sea level rise.

“Unfortunately, once impacts are noticed, they will become commonplace rather quickly. We find that in 30 to 40 years, even modest projections of global sea level rise – 1.5 feet by the year 2100 – will increase instances of daily high tide flooding to a point requiring an active and potentially costly response.

“And by the end of the century, our projections show that there will be near-daily nuisance flooding in most of the locations that we reviewed.” – Climate News Network

About the Author

Tim Radford, freelance journalistTim Radford is a freelance journalist. He worked for The Guardian for 32 years, becoming (among other things) letters editor, arts editor, literary editor and science editor. He won the Association of British Science Writers award for science writer of the year four times. He served on the UK committee for the International Decade for Natural Disaster Reduction. He has lectured about science and the media in dozens of British and foreign cities. 

Science that Changed the World: The untold story of the other 1960s revolutionBook by this Author:

Science that Changed the World: The untold story of the other 1960s revolution
by Tim Radford.

Click here for more info and/or to order this book on Amazon. (Kindle book)

climate_books

English Afrikaans Arabic Chinese (Simplified) Chinese (Traditional) Dutch Filipino French German Hindi Indonesian Italian Japanese Korean Malay Persian Portuguese Russian Spanish Swahili Swedish Thai Turkish Urdu Vietnamese

LATEST VIDEOS

Jay Inslee Tells Hayes That He Wants To Gut The Filibuster To Fight Climate Change
by MSNBC
Washington Governor Jay Inslee is running for president on the single issue of climate change and argues that doing…
Causes and Effects of Climate Change
by National Geographic
What causes climate change (also known as global warming)? And what are the effects of climate change? Learn the human…
Extreme Weather and Global Warming
by NASA Goddard
Is the frequency of extreme weather events a sign that global warming is gaining pace and exceeding predictions? Bill…
Thanks to Climate Change, Wet Winters No Match for Drier California Summers
by KPIX CBS SF Bay Area
If the emerald-green hills around Northern California have you thinking recent rains have put a damper on the fire…
Climate Change Is Not One Issue
by MSNBC
"Climate change is not one issue," said David Wallace-Wells, author of "The Uninhabitable Earth," but is…
The Heat: Climate change
by CGTN America
Images gathered by NASA show an increase in foliage in China and India. The greening effect is mainly due to ambitious…
No company is doing enough to combat climate change: Jeremy Grantham
by CNBC Television
Jeremy Grantham, co-founder of GMO, on climate change and what needs to be done to combat it.
Power Plants Are POISONING Groundwater All Over America
by The Ring of Fire
According to a new report, 90% of coal-fired power plants across the country have completely contaminated the…

LATEST ARTICLES

Default Image
Come on, UK weather forecasters – tell it like it is on climate change
by Adam Corner
They have a national reach that most climate campaigners would die for. They are familiar and respected experts on the…
Green New Deal: 6 places already reducing emissions from buildings
Green New Deal: 6 places already reducing emissions from buildings
by David Roberts
One of the elements of the Green New Deal resolution that has caused the most consternation among critics on the right…
Default Image
UK environmentalists target Barclays in fossil fuels campaign
by Matthew Taylor
A UK-wide campaign is being launched to persuade one of the country’s biggest high street banks to stop investing…
Oceanic carbon uptake could falter
Oceanic carbon uptake could falter
by Tim Radford
What does oceanic carbon uptake achieve? Greenhouse gas that sinks below the waves slows global warming a little and…
Britain (Yes, Rainy Britain) Could Run Short of Water by 2050, Official Says
Britain (Yes, Rainy Britain) Could Run Short of Water by 2050, Official Says
by Global Warming & Climate Change
“Climate change plus growth equals an existential threat,” Mr. Bevan said. To avoid severe water shortages, he added,…
Default Image
Record high US temperatures outpace record lows two to one, study finds
by Associated Press
Over the past 20 years, Americans have been twice as likely to sweat through record-breaking heat rather than shiver…
Climate change: Water shortages in England 'within 25 years'
Climate change: Water shortages in England 'within 25 years'
by BBC News - Science & Environment
Image copyright PA Image caption Low water levels at Wayoh Reservoir near Bolton in the UK heatwave in July 2018 Within…
Default Image
Why you'll never meet a white supremacist who cares about climate change
by Rebecca Solnit
As the news of the Christchurch mosque massacre broke and I scoured the news, I came across a map showing that the…