The Daily Parker

Politics, Weather, Photography, and the Dog

Time to sell that beachfront property in Ft. Lauderdale

Anthropogenic climate change may have permanently destabilized both the West and East Antarctic Ice Sheets, meaning the planet could experience 3.3 to 4.3 meter sea-level rises in the next few centuries. And even better, gravity will push more towards North America than towards anyplace else:

In the event of a collapse of the West Antarctic ice sheet, scientists have determined that the United States will receive moresea level rise than almost any other part of the world. (Granted, so will other countries in North America, like Canada and Mexico, which have considerably less global warming responsibility.)

In this case, West Antarctica is so large that it pulls the global ocean toward it, which slopes upward toward the ice sheet and the Antarctic continent in general. But if West Antarctica were to lose a substantial part of its ice, then the gravitational pull would relax, and sea level would actually decrease near the ice sheet even as it spreads and increases across the global ocean.

But not evenly. Instead, areas farther from West Antarctica would get more sea level rise, and North America and the United States might get more than any other inhabited place on Earth. “The water that had been held close to West Antarctica spreads out across the ocean,” explains Penn State glaciologist Richard Alley, “and we’re far enough away that we weren’t in the ‘pile’ that was held close to West Antarctica when the ice sheet was there and its gravity attracted the water to make the pile, but we get our share of the water from that pile when it spreads out.”

So possibly, a couple centuries from now, there will be an enormous dam protecting the Long Island Sound from the Atlantic, and Florida will be an artificial island somewhere near Miami. Good work, humans.

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