GCM sensitivity test using increased rotation rate, reduced solar forcing and orography to examine low latitude glaciation in the Neoproterozoic

Details GCM sensitivity test using increased rotation rate, reduced solar forcing and orography to examine low latitude glaciation in the Neoproterozoic GCM sensitivity test using increased rotation rate, reduced solar forcing and orography to examine low latitude glaciation in the Neoproterozoic

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.3525j&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 18, p. 3525-3528

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11

Global Change: Climate Dynamics, Meteorology And Atmospheric Dynamics: Paleoclimatology

Scientific paper

During the Neoproterozoic period, most land-masses were assembled into the super-continent, Rodinia, and parts experienced glaciation in low paleolatitudes. We examine possible causes of glaciation by increasing rotation rate, reducing the solar constant and carbon dioxide concentrations for an idealized super-continent that is centered in the Northern Hemisphere tropics-subtropics. Further, we introduce a 2 km north-south mountain chain in the western regions of this super-continent. A mixed layer ocean or prescribed time varying sea surface temperatures are used in these simulations. Our results show that neither an individual factor or a combination of these factors can cool temperatures enough to bring about glaciation on the tropical super-continent. We conclude that other factors would be needed to initiate glaciation.

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