If This GIF of 10,000 Years of Sea Level Rise Doesn't Freak You Out, Nothing Will
If This GIF of 10,000 Years of Sea Level Rise Doesn't Freak You Out, Nothing Will
Emily Badger
May 31, 2013
Fossilized sediment from New Jersey's salt marshes contains evidence of a migrating coast line. For some 2,000 years, up until the dawn of our modern warming era around 1900, the sea level off of what's now New Jersey was rising by about one to two millimeters a year, with the coast itself imperceptibly creeping inland. Today, the sea level is rising by three to five millimeters a year.
Perhaps that still doesn't sound like much. But this is the point of taking a very long view of history.
"The last time we saw rates as fast as this was 6,000 years ago," says Benjamin Horton, an associate professor in the Department of Earth and Environmental Science at the University of Pennsylvania.
And what was happening 6,000 years ago? Temperatures were rising then, too, although they weren't as warm as they are today.
"Because we came out of a glacial period, oceans were warming, and ice sheets were melting," Horton says. "They're exactly the same processes that we’re seeing today."
Horton and fellow researchers have used that fossilized evidence to reconstruct sea-level rise around New Jersey going back 10,000 years in research newly published in the Journal of Quaternary Science. To do this, they collected sediment cores drilled tens of meters below ground from coastal marshes, then examined the sediment back in a lab for microscopic organisms that only exist at specific depths below sea level. Salt marsh grasses also fossilized within the sediment were used to radiocarbon-date the samples.
The 10 maps contained in the GIF below show the movement of sea level at 1,000-year intervals leading up today:
Topography in meters. GIF built with maps courtesy of Benjamin Horton and Dick Peltier (University of Toronto).
The black outline represents the coast as it exists today. The "0" on the color bar above is sea level, with green, yellow, orange, and red areas showing elevation in meters above sea level, and teal and blue showing the depth of the ocean below it. For reference, this is the same land on a map you may more easily recognize, from Chesapeake, Virginia to Boston:
For coastal cities still recovering from Superstorm Sandy, this history should be particularly alarming.
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http://www.theatlanticcities.com/neighborhoods/2013/05/if-gif-10000-years-sea-level-rise-doesnt-freak-you-out-nothing-will/5751/
= new reply since forum marked as read
This is part of the ebb and flow of things. Nice to see my house will still be there in 10,000 years, though. 
Somehow I don't think it was an attempt at humor
