GCM response to late precambrian (~590 Ma) ice-covered continents

Details GCM response to late precambrian (~590 Ma) ice-covered continents GCM response to late precambrian (~590 Ma) ice-covered continents

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28..583b&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 4, p. 583-586

Physics

11

Meteorology And Atmospheric Dynamics: Paleoclimatology

Scientific paper

Recent coupled energy balance/ice sheet modeling studies indicate that ice-covered continents can be simulated for the Late Precambrian with 6% solar constant reduction. We examine the ocean mixed layer response to such an ice sheet with the GENESIS 2 general circulation model and CO2 levels varying from 0.5-2.5 times present. The ocean ices over completely at 0.5-1.0X present levels, with the final phase of sea ice growth occurring within a single model year. A qualitatively different 2.5X CO2 solution is close to equilibrium and yields open water between ~25°N and ~25°S paleolatitude. The prevailing wind patterns suggest that an equatorial Pacific-type circulation may have developed in part of the Neoproterozoic ocean.

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