Most scientists in the field see a connection between the stronger winds and human-caused global warming, but they say other factors are likely at work, too. Natural variability of climate may be one of them. Another may be the ozone hole over Antarctica, caused by an entirely different environmental problem, the human release of ozone-destroying gases.
An earlier version of this article misstated the surname of the lead author of a paper in Science about the accelerated flow of glaciers in West Antarctica. He is Ian Joughin, not Joaquin.