...since the late 19th century – as the world became industrialized – sea level has risen more than 2 millimeters per year, on average. That's a bit less than one-tenth of an inch, but it adds up over time.
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the researchers found that sea level was relatively stable from 100 B.C. to A.D. 950. Then, during a warm climate period beginning in the 11th century, sea level rose by about half a millimeter per year for 400 years. That was followed by a second period of stable sea level associated with a cooler period, known as the Little Ice Age, which persisted until the late 19th century.
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