English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Multiband wavelet age modeling for a ∼293 m (∼600 kyr) sediment core from Chew Bahir Basin, Southern Ethiopian Rift

Duesing, W., Berner, N., Deino, A. L., Foerster, V., Krämer, K.-H., Marwan, N., Trauth, M. H. (2021): Multiband wavelet age modeling for a ∼293 m (∼600 kyr) sediment core from Chew Bahir Basin, Southern Ethiopian Rift. - Frontiers in Earth Science, 9, 594047.
https://doi.org/10.3389/feart.2021.594047

Item is

Basic

show hide
Item Permalink: https://publications.pik-potsdam.de/pubman/item/item_25400 Version Permalink: https://publications.pik-potsdam.de/pubman/item/item_25400_1
Genre: Journal Article

Files

show Files
hide Files
:
25400oa.pdf (Publisher version), 5MB
Name:
25400oa.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show

Creators

show
hide
 Creators:
Duesing, Walter1, Author
Berner, Nadine1, Author
Deino, Alan L.1, Author
Foerster, Verena1, Author
Krämer, Kai-Hauke2, Author              
Marwan, Norbert2, Author              
Trauth, Martin H.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, Potsdam, ou_persistent13              

Content

show
hide
Free keywords: orbital forcing; african climate; age modeling; cyclostratigraphy; lake sediments
 Abstract: The use of cyclostratigraphy to reconstruct the timing of deposition of lacustrine deposits requires sophisticated tuning techniques that can accommodate continuous long-term changes in sedimentation rates. However, most tuning methods use stationary filters that are unable to take into account such long-term variations in accumulation rates. To overcome this problem we present herein a new multiband wavelet age modeling (MUBAWA) technique that is particularly suitable for such situations and demonstrate its use on a 293 m composite core from the Chew Bahir basin, southern Ethiopian rift. In contrast to traditional tuning methods, which use a single, defined bandpass filter, the new method uses an adaptive bandpass filter that adapts to changes in continuous spatial frequency evolution paths in a wavelet power spectrum, within which the wavelength varies considerably along the length of the core due to continuous changes in long-term sedimentation rates. We first applied the MUBAWA technique to a synthetic data set before then using it to establish an age model for the approximately 293 m long composite core from the Chew Bahir basin. For this we used the 2nd principal component of color reflectance values from the sediment, which showed distinct cycles with wavelengths of 10–15 and of ∼40 m that were probably a result of the influence of orbital cycles. We used six independent 40Ar/39Ar ages from volcanic ash layers within the core to determine an approximate spatial frequency range for the orbital signal. Our results demonstrate that the new wavelet-based age modeling technique can significantly increase the accuracy of tuned age models.

Details

show
hide
Language(s):
 Dates: 2021-02-012021-03-042021-03-04
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3389/feart.2021.594047
MDB-ID: No data to archive
PIKDOMAIN: RD4 - Complexity Science
Research topic keyword: Paleoclimate
Regional keyword: Africa
Model / method: Quantitative Methods
Model / method: Research Software Engineering (RSE)
Model / method: Machine Learning
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Frontiers in Earth Science
Source Genre: Journal, Scopus, p3, oa
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 9 Sequence Number: 594047 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/140822