Sunday, February 25, 2007

What Is Happening to the Antarctic Ice Sheet(s)?

Curt H. Davis, Yonghong Li, Joseph R. McConnell, Markus M. Frey & Edward Hanna Snowfall-Driven Growth in East Antarctic Ice Sheet Mitigates Recent Sea-Level Rise, SCIENCE (June 24, 2005)(abstract):
Satellite radar altimetry measurements indicate that the East Antarctic ice-sheet interior north of 81.6°S increased in mass by 45 ± 7 billion metric tons per year from 1992 to 2003. Comparisons with contemporaneous meteorological model snowfall estimates suggest that the gain in mass was associated with increased precipitation. A gain of this magnitude is enough to slow sea-level rise by 0.12 ± 0.02 millimeters per year.
Compare: "Insignificant change in Antarctic snowfall since the International Geophysical Year," A. J. Monaghan, D. H. Bromwich, R. L. Fogt, S.-H. Wang, P. A. Mayewski, D. A. Dixon, A. Ekaykin, M. Frezzotti, I. Goodwin, E. Isaksson, S. D. Kaspari, V. I. Morgan, H. Oerter, T. D. Van Ommen, C. J. Van der Veen, and J. Wen (2006) Science 313, 827-831
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