Sea level change due to oscillations in seafloor spreading rate

Details Sea level change due to oscillations in seafloor spreading rate Sea level change due to oscillations in seafloor spreading rate

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pepi..109..151b&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 109, Issue 3-4, p. 151-159.

Physics

Scientific paper

We present a theory for divergent seafloor spreading which predicts that transient surges in spreading rate would cause geodynamic sea level rise rates approximately equal to the transient surge velocity at the ridge crest multiplied by the aspect ratio of the spreading plate, i.e., a surge velocity of 3 cm/yr, acting on a plate thickness 100 km, and width 3000 km would produce a geodynamic sea level rise rate of 1 mm/yr. This rate is geologically significant, and it is suggested that the calving of ice by flotation due to geodynamic sea level rise may feedback positively on a thermal sea level rise, and provide a mechanism whereby plate tectonics can actually drive climatic change. The theory depends on the assumption that plate motion is governed by thermally driven ridge push forces balanced by frictional drag at the base of the plate.

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