Woods Hole Oceanographic Institution

Jason C. Goodman

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Goodman, J. C., Through Thick and Thin: Marine and Meteoric Ice in a `Snowball Earth? Climate, Geophysical Research Letters, 2006

Marine ice cover in the frigid Neoproterozoic climate system tends to isolate the ocean: the thickness of this ice, and thus the degree of isolation, is an important unknown in geochemical and biological arguments regarding the fullly-glaciated ?Snowball Earth? hypothesis. The Pollard and Kasting (2005) coupled atmosphere/ice model has been modified to track ice of marine and atmospheric origin separately, and model their different optical properties. In contrast to Pollard and Kasting?s results, a tropical region of thin ice is not stable in this model: ice is hundreds of meters thick everywhere. The overall pattern of the hydrological cycle in a Snowball climate is also discussed.

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