Global Warming May Alter Atlantic Currents, Study Says

In the 2004 eco-disaster film The Day After Tomorrow, Europe and North America are gripped by a deep freeze after global warming halts the circulation of a North Atlantic ocean current. The film is pure Hollywood hyperbole.

But some scientists say the current is vulnerable to rising temperatures.

Acting like a conveyor belt, the current transports warm, surface waters toward the Poles and cold, deep waters toward the Equator.