Coastal erosion and coastal floods

Ambitious climate policies are needed to avoid fast sea level rise

If we do not succeed in mitigating global warming, sea level may rise up to 2 m in 2100. Ambitious climate policies are needed to avoid the most severe impacts from rising sea levels around the globe.

When sea level rise accelerates, inland migration may not be that easy

Recently, scientists showed that sea level might rise much faster than projected by the IPCC in its latest assessment report. What if they are correct, and large-scale inland migration takes place?

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What if the past is the key to the future? We may start losing coastal deltas 50 years from now

Sea level rise slow down 7500 years ago started delta formation globally. What if the past is a key to the future? Will accelerating sea level rise this century be a tipping point of delta collapse?

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Deltas at the Greenland coast are growing due to a warmer climate

Since the 1980s, the deltas at the Greenland coast have been extending into the sea due to increased freshwater runoff from the ice sheet and more sediment transport to the coast.

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Historic palaces of Venice provide a clue for sea level rise since 1350

Sea level rise reconstructed step by step. Submerged steps of water stairs of palaces on the Grand Canal provide an exceptionally long series of data on sea level rise.

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Just a few cm of sea-level rise may double the frequency of coastal flooding

Only 5-10 cm of sea-level rise may more than double the frequency of coastal flooding in the Tropics as early as 2030. Some of the largest cities in the world may face a dire future.

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Current once-in-a-hundred-years flood levels along US coastline may occur every few years by 2050

Along the US east coast sea level rise may lead to strong amplification of high frequency flood events. Along the west coast, on the other hand, amplification is strongest for lower frequency flooding

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Latest estimate of current rate of global sea level rise: 3.5 mm per year

The rate of global mean sea level rise has increased over the last two decades, mainly due to increased land ice loss from Greenland. Over the period 2004-2015 sea level rose about 3.5 mm per year.

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Extreme sea levels on the rise along Europe’s coasts

Future extreme sea levels along Europe’s coasts are mainly driven by relative sea level rise. Averaged over Europe, changes in tides, storm surges and wave set up contribute less than 20%.

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How to decide on adaptation when the future is highly uncertain?

Presented by Marjolijn Haasnoot of the Netherlands’ research institute Deltares and Delft University of Technology at the European Climate Change Adaptation Conference in Glasgow in June 2017.

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The Dutch are drilling in the North Sea to reconstruct sea level rise

How did the land under the North Sea submerge 4,000 years ago? Dutch researchers are drilling in the North Sea to unravel this story and reconstruct sea level rise.

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High-end sea level rise estimates when Antarctic ice shelves break up

A new high-end projection for global sea level rise, based on a recent study on the impact of Antarctic ice mass loss, shows sea level rise in 2100 may be much higher than the recent IPCC estimate.

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Climate change impacts on dune erosion along the Dutch coast

The Dutch coast is eroding. A recent study shows that the volume of eroded dune sand increases linearly with sea level rise by little over 20 % per meter sea level rise.

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Launched: coastal hazard assessment app

For developing countries the assessment of coastal hazards is often hampered by lack of data. Dutch researchers of Deltares developed an app to use global open assess data for these assessments.

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How high will the seas rise?

Previous sea level rise projections may have underestimated the contribution of Greenland and Antarctic ice sheets. Recent studies lead to upward adjustment of estimated sea level rise in 2100.

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Protecting Poland against future coastal floods is not that expensive

Impacts of future sea level rise and storm surges on the Polish coastal zone may be much less than previous studies indicated. And so are adaptation costs to strengthen coastal flood defences.

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Lower wind speed and waves along the Irish coast this century

According to the latest research, wind extremes and storminess over the North Atlantic Ocean will decrease this century. As a result, future waves along the Irish coast will be somewhat lower as well.

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Storm surge levels increase along Northern Europe’s coastline

Future trends in storm surge level changes along the European coastline show an increase for Northern Europe and small or no changes for Southern Europe.

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Cretan beaches (Greece) highly vulnerable to sea level rise

High sea level rise may be catastrophic for the beaches of Crete. Strong erosion may require costly adaptation measures to ensure their long-term sustainability.

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Sand Motor: Mother Nature helps the Dutch to protect their coast

The sea takes sand from the Dutch coast that is replenished by depositing sand on the beaches and in the offshore. The Dutch have found a more natural way to protect their coast: the Sand Motor.

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Preparing for a risky future

A new report from the World Bank warns that the world is ill-prepared for an increase in the number of disasters in large cities.

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Waves overtopping breakwaters increase Catalan ports’ vulnerability to sea level rise

One of the greatest impacts of sea level rise on seaports is related to wave overtopping. Sea level rise increases overtopping and potentially endangers boats and other assets.

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Adaptation to sea level rise: where to protect and when to start?

Presented by Sally Brown (University of Southampton, UK) and Daniel Lincke (Global Climate Forum, Germany) at the Adaptation Futures Conference in Rotterdam, The Netherlands, May 2016

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More water stored on land slowed down sea level rise in last decade

Over the last years, climate-driven changes such as large-scale floods have increased the volume of water on land. This increase slowed down sea level rise.

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Future flood losses in major coastal cities

We shouldn’t just look at the consequences of a flood to conclude which deltas are most vulnerable. We should include flood probability, and thus flood protection infrastructure, as well.

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Salt marshes will survive sea level rise

Sea level rise over the next decades is not an immediate, catastrophic threat to many marshes: marshes will survive in place under relatively fast rates of sea level rise

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Benefits of protecting London from the sea

Options have been investigated for the future of protecting London from flooding from the sea. Economic analyses have shown that improving the existing flood defences

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Delfland Sand Engine, from reactive to proactive coastal protection

Along the Holland coast an experiment is being carried out with a concentrated mega-nourishment with 20 million m3 of sand (the so-called Delfland Sand Engine).

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North Sea storm surge changes in the 21st century

Extreme storm surge heights likely will show a small increase toward the coasts of the German Bight with stronger changes along the North Frisian Islands ...

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