Most coastal communities will encounter '100-year floods' annually by the end of the century, even under a moderate scenario where carbon dioxide emissions peak by 2040, according to a new study. And as early as 2050, regions worldwide could experience 100-year floods every nine to fifteen years on average.
Most coastal communities will encounter 100-year floods annually by the end of the century, even under a moderate scenario where carbon dioxide emissions peak by 2040, a new study finds. And as early as 2050, regions worldwide could experience 100-year floods every nine to fifteen years on average.
On the coast, extreme floods can be caused by water pushed inland by storms, tides and waves, but this study focuses on a component that contributes to flooding over a much longer time scale -- sea level rise. As higher seas creep up the shore, coastal infrastructure will be closer to the water, making storms, tides and waves more likely to impact communities.
Previous studies relied on stationary estimates of extreme sea levels to predict 100-year floods, but this study used non-stationary methods and found that the shift in extreme sea levels will not be uniform for many tide-gauge locations. More than 600 million people live in low-lying coastal regions, according to another study. That number is expected to rise. Well-designed coastal defense structures play an important role in coastal communities' ability to withstand major flooding.
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Century's end may bring annual 100-year floodsMost coastal communities will encounter 100-year floods annually by the end of the century, even under a moderate scenario where carbon dioxide emissions peak by 2040, a new study finds. And as early as 2050, regions worldwide could experience 100-year floods every nine to fifteen years on average.
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