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Permanent link (DOI): https://doi.org/10.7939/R3Q72J

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Time series processing: stratigraphic and paleoclimatic implications Open Access

Descriptions

Other title
Subject/Keyword
eccentricity
paleoclimate
tuning
obliquity
Milankovitch
timescale
precession
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Rohraff, Karol J.
Supervisor and department
Sacchi , Mauricio (Physics)
Kravchinsky, Vadim (Physics)
Examining committee member and department
Sacchi , Mauricio (Physics)
Gingras, Murray (Earth and Atmospheric Sciences)
Kravchinsky, Vadim (Physics)
Potter, David (Physics)
Department
Department of Physics
Specialization

Date accepted
2011-12-08T19:09:33Z
Graduation date
2012-06
Degree
Master of Science
Degree level
Master's
Abstract
Three sedimentary drilling cores from Lake Baikal were used to build a new composite magnetic susceptibility record for the Brunhes and upper Matuyama chrons. The developed age model, based on the constructing of the composite susceptibility signal and orbital tuning, shows a substantial improvement to the previously published timescales. The susceptibility spectrum approaches the expected continental climatic response with precession cycles being clearly resolved compared to the previous studies. The correctness of the new timescale is confirmed with the published ages of beryllium dating and geomagnetic reversals. Since many of the tuning techniques have difficulties in resolving short periods, a completely new method has been subsequently developed. The method improves the high frequency components by allowing nonlinear sedimentation rates which results in an accurate timescale. Additionally, the technique enables tuning to specific periods what can be advantageous since various regions in the world record orbital periods in a different way.
Language
English
DOI
doi:10.7939/R3Q72J
Rights
License granted by Karol Rohraff (rohraff@ualberta.ca) on 2011-12-07T20:07:45Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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