A World Without Ice

A member of the Nobel Peace Prize-winning Intergovernmental Panel of Climate Change, Univ. of Mich. geophysicist Pollack (Uncertain Science) shares the warning call of Al Gore (his co-recipient), that ""humanity has arrived at an historic moment of decision."" According to science, Pollack explains, humanity may soon lose the polar ice caps altogether, with dire consequences. Pollack explains how glacial ice is ""a major player"" in the climate: snow and ice ""account for much of the sunshine reflected from the surface"" and their disappearance will only accelerate the rate of global warming. Using geological evidence (800 bore-holes drilled on the earth's continental crust), Pollack and his colleagues have established that the past 500 years have seen a 2-degree increase in the Earth's average temperature, and that ""fully half of the warming occurred in the 20th century."" While taking account of countervailing forces (like periodic variations in the earth's orbit, explosive volcanism, and changes in solar radiation) Pollack shows that no single natural force can reverse the present trend, which if unchecked will render the Earth uninhabitable. This important wake up call joins a rapidly growing selection; this volume distinguishes itself with a Nobel pedigree and a sound, straightforward approach.