| Lagrangian avenues of transport in the Earth's mantle. | |
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MedLine Citation:
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PMID: 17902997 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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A method of visualizing and characterizing stirring structures of high Rayleigh number geophysical flows whose time dependence is strongly aperiodic is presented. To this end, the system is leaked by defining a smaller region of the flow, so that a particle is considered to be escaped if it enters this region. By means of an ensemble of nonescaped tracers, we are able to characterize stirring and transport processes by visualizing the converging and stretching filamentations (stable and unstable manifolds) in the flow. The method indicates that the present-day Earth's mantle is not well stirred because the time that has passed since the formation of the Earth has not been long enough for the flow of the mantle to generate efficient stirring, and observations reveal indeed the existence of reservoirs of different materials. |
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Authors:
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Judit Schneider; Joerg Schmalzl; Tamás Tél |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Chaos (Woodbury, N.Y.) Volume: 17 ISSN: 1054-1500 ISO Abbreviation: Chaos Publication Date: 2007 Sep |
Date Detail:
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Created Date: 2007-10-01 Completed Date: 2007-12-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100971574 Medline TA: Chaos Country: United States |
Other Details:
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Languages: eng Pagination: 033115 Citation Subset: - |
Affiliation:
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Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, 27568 Bremerhaven, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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