Climate Central: While the steady disappearance of sea ice in the Arctic has been one of the hallmark effects of global warming, research shows it is not only covering less of the planet, but it's also getting significantly thinner. That makes it more susceptible to melting, potentially altering local ecosystems, shipping routes and ocean and atmospheric patterns.
New data compiled from a range of sources -- from Navy submarines to satellites -- suggests that thinning is happening much faster than models have...