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Science 2 August 2002:
Vol. 297. no. 5582, pp. 783 - 784
DOI: 10.1126/science.1074593
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Perspectives

GEOPHYSICS:
Redistributing Earth's Mass

Anny Cazenave and R. Steven Nerem

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.

A. Cazenave is at LEGOS-GRGS, Centre National d'Etudes Spatiales (CNES), F-31400 Toulouse, France. E-mail: anny.cazenave{at}cnes.fr R. S. Nerem is at the Colorado Center for Astrodynamics Research, University of Colorado, Boulder, CO 80309, USA. E-mail: nerem{at}colorado.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)