Document Detail


Arctic East Siberia had a lower latitude in the Pleistocene.
MedLine Citation:
PMID:  17625673     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Remains of mammoths in Arctic East Siberia, where there is not sufficient sunlight over the year for the growth of the plants on which these animals feed, indicate that the latitude of this region was lower before the end of the Pleistocene than now. Reconstructing this geographic pole shift, we introduce a massive object, which moved in an extremely eccentric orbit and was hot from tidal work and solar radiation. Evaporation produced a disk-shaped cloud of ions around the Sun. This cloud partially shielded the solar radiation, producing the cold and warm periods characterizing the Pleistocene. The shielding depends on the inclination of Earth's orbit, which has a period of 100,000 years. The cloud builds up to a point where inelastic particle collisions induce its collapse The resulting near-periodic time dependence resembles that of Dansgaard-Oeschger events. The Pleistocene ended when the massive object had a close encounter with the Earth, which suffered a one per mil extensional deformation. While the deformation relaxed to an equilibrium shape in one to several years, the globe turned relative to the rotation axis: The North Pole moved from Greenland to the Arctic Sea. The massive object split into fragments, which evaporated.
Authors:
Willy Woelfli; Walter Baltensperger
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Anais da Academia Brasileira de Ciências     Volume:  79     ISSN:  0001-3765     ISO Abbreviation:  An. Acad. Bras. Cienc.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-07-12     Completed Date:  2007-12-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503280     Medline TA:  An Acad Bras Cienc     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  183-93     Citation Subset:  -    
Affiliation:
Institute for Particle Physics, ETHZ Hönggerberg, Zürich, Switzerland.
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