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Climate Change Made Hurricane Sandy Significantly More Costly – $8 Billion More, Study Says
In 2012, Hurricane Sandy was about as close to a worst-case scenario storm for the New York, New Jersey and Connecticut area as one could imagine. With a storm surge of 9 feet inundating highly populated areas and valuable real estate, it was the fourth costliest hurricane in U.S. history, causing nearly $63 billion in damage.
Now, in a first-of-its-kind study published in the journal Nature Communications, a team of researchers has quantified just how much more the storm cost due to higher sea levels from human-caused climate change. The study found that the damage increased by $8.1 billion or 13% of the total cost compared to what it would have been in a world without climate change. The study also found that climate change led to about 71,000 additional people being impacted by the flooding.
Researchers did this by comparing 2012 observations to climate simulations of a world without global warming. They made calculations for sea level rise overall, then did it for each of the main contributors to sea level rise: warmer waters expanding and extra water from melting glaciers and ice sheets in Greenland and Antarctica.
The researchers determined globally seas in 2012 were 4.1 inches higher than in 1900 because of climate change, but the amount was slightly less in New York: 3.8 inches.
The reason is that Alaska s melting glaciers and Greenland’s melting ice sheet are relatively close to the East Coast and the physics of sea level rise puts the biggest increases on the opposite end of the globe from the biggest melts, said study co-author Bob Kopp, director of Rutgers University s Institute of Earth, Oceans and Atmospheric Sciences.