High obliquity as an alternative hypothesis to early and late proterozoic extreme climate conditions

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7 Scopus citations


Climate model simulations are used to assess the high obliquity hypothesis as a solution to Palaeoproterozoic and Neoproterozoic low-latitude glacial conditions. Climate model simulations show that if a low-latitude land mass is assembled it can explain the Paleoproterozoic glacial deposits. In the Neoproterozoic, the High Obliq-uity hypothesis can explain the Sturtian low-latitude glacial deposits when the super-continent Rodinia was located in low-latitudes. The High Obliquity hypothesis cannot explain Varangian high-latitude glacial deposits because of the high amounts of incident solar radiation, which will not allow for the accumulation of snow. However the high-latitude Varangian glacial deposits are the least reliable and should be viewed with caution. Moreover, if the majority of glacial deposits are in low-latitudes in support of the high obliquity hypothesis it is possible that local environmental con-ditions such as elevated topography may have been responsible for high latitude glacial deposits. The most problematic issue for high obliquity is the mechanism responsible for significantly reducing obliquity on a 100-million year time-scale.

Original languageEnglish (US)
Title of host publicationThe Extreme Proterozoic
Subtitle of host publicationGeology, Geochemistry, and Climate, 2004
EditorsChristopher P. McKay, Mark A.S. McMenamin, Linda Sohl, Gregory S. Jenkins
PublisherBlackwell Publishing Ltd
Number of pages10
ISBN (Electronic)9781118666289
ISBN (Print)9780875904115
StatePublished - 2004

Publication series

NameGeophysical Monograph Series
ISSN (Print)0065-8448
ISSN (Electronic)2328-8779

All Science Journal Classification (ASJC) codes

  • Geophysics


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