Spatial variations in the rate of sea level rise caused by the present-day melting of glaciers and ice sheets

Details Spatial variations in the rate of sea level rise caused by the present-day melting of glaciers and ice sheets Spatial variations in the rate of sea level rise caused by the present-day melting of glaciers and ice sheets

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1503c&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 12, p. 1503-1506

Physics

12

Oceanography: Physical: Sea Level Variations, Geodesy And Gravity: Geopotential Theory And Determination, Oceanography: General: Climate And Interannual Variability

Scientific paper

The redistribution of surface water mass associated with the melting of glacial ice causes uplift near areas of mass depletion, depression of the seafloors, and changes in the earth's gravitational field which perturb the ocean surface. As a result, local spatial variations exist in the rate of sea level rise. Tide gauges on continental coastlines measure a sea level rise 5% smaller than the global average. Tide gauges in the hemisphere opposite a source of continental mass depletion measure sea level rise 10 to 20% greater than the global average produced by that source while satellites make measurements 10% too low. Because most long duration tide gauges are in the northern hemisphere, if the sources of sea level rise are unbalanced between the two hemispheres, estimates of global sea level rise could be in error by 10 to 20%. Individual tide gauges could be more seriously unrepresentative if they are near regions of significant present-day mass depletion.

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