Sea levels rose faster in 20th century than in previous 2700 years, says study – CNN

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The authors said it was the first estimate, to their knowledge, of global sea level change over the past 3,000 years based on a “statistical synthesis of a global database of regional sea level reconstructions.”

It used a new statistical framework to combine reconstructions of 1,300 geological sea level changes in 24 locations around the world, along with measurements from 66 “tide gauges.”

You’re making this island disappear

The study says the global sea level rose at a rate of 1.4 millimeters (0.05 inches) a year during the 20th century. NASA’s figures, which put the current rate of sea rise at 3.4 millimeters (0.13 inches) a year, suggest sea level rise is only accelerating.

The study’s authors said a “significant” and “historic” acceleration in sea level rise began in the 19th century.

It also found that the 20th century “wasn’t the only time period when temperature and global sea level changed together,” wrote Kopp.

The study found that that the global sea level fell by “a statistically robust” 8 centimeters between 1000 and 1400, a period in which the global temperatures declined by about 0.2°C, he wrote.

Rising sea levels ‘could drive 100 million into extreme poverty’

An assessment report from the U.N’s Intergovernmental Panel on Climate Change in 2013 found with 95% certainty that human activity was to blame for at least half of climate change in the last half-century.

The report, created from the work of nearly 1,000 researchers worldwide and considered the benchmark study on global warming, projected a rise in global sea levels of 1 to 3 feet (about 30 to 90 centimeters).

But researchers last year suggested those predictions could be too conservative, with ice loss from massive melting ice sheets in Antarctica and Greenland being a major concern.

In December, ministers from 195 countries adopted a legally binding agreement in Paris to fight climate change. The goal of the deal is to help the world abandon fossil fuels this century and, specifically, stop global warming “well below” 2 degrees Celsius and, if possible, below 1.5 degrees.

Complete CNN climate coverage

Opinion: 15 scary facts about sea level rise

Sea levels rose faster in 20th century than in previous 2700 years, says study – CNN