Fifty degrees below / Robinson, Kim Stanley

After years of denial and non-action, a near-future Earth faces a crossroad when it is threatened with the dire implications of global warming, an environmental crisis that ironically could unleash a devastating Ice Age on the planet.

Washington, D.C., scientist Frank Vanderwal, having survived a killer storm caused by global warming, prepares to face an even worse disaster when the melting of the polar ice caps shuts down the warm waters of the Gulf Stream, which promises to throw the world into another Ice Age.