Time series processing: stratigraphic and paleoclimatic implications

• Author / Creator

  Rohraff, Karol J.

• 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.

• Subjects / Keywords

  • Tuning
  • Eccentricity
  • Timescale
  • Precession
  • Paleoclimate
  • Obliquity
  • Milankovitch

• Graduation date

  Spring 2012

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3Q72J

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.