When it comes to preparing for sea-level rise in coastal cities, the Dutch have a big head start on the rest of the world. And their best array of tools may be on display in and around the port city of Rotterdam.
The Beaufort Gyre, a key Arctic Ocean current that traps huge amounts of ice and cold freshwater, is behaving strangely. When it eventually discharges its contents, the event could begin a period of sharply lower temperatures in northern Europe.
While it's been unusually cold and snowy in much of Europe, the Arctic has been seeing record warm temperatures and a huge loss of ice. Here's how the two are linked, and what they might have to do with climate change.