Redistributing Earth's Mass

Abstract
Since the end of the last glaciation, postglacial rebound of Earth's crust has resulted in a net transfer of mass from the equatorial regions to high latitudes. This small mass transfer has been monitored for 25 years. But a report by Cox and Chao suggests that since 1998, the mass transfer has changed direction. In their Perspective, Cazenave and Nerem discuss possible mechanisms that may have caused this change.