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

Gregory S. Jenkins, Larry A. Frakes

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

During the Neoproterozoic period, most landmasses 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 Hemispehre 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.

Original languageEnglish (US)
Pages (from-to)3525-3528
Number of pages4
JournalGeophysical Research Letters
Volume25
Issue number18
DOIs
StatePublished - Sep 15 1998

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orography
supercontinent
continents
tropical regions
glaciation
general circulation model
sensitivity
carbon dioxide concentration
solar constant
Rodinia
paleolatitude
sea surface temperature
dioxides
mountains
mixed layer
oceans
carbon dioxide
mountain
test
rate

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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