Visual Stratigraphy-Based Age Scale Developed for the Shallow Mount Siple Firn Core, Antarctica
Brown, Joseph W.; Moser, Dorothea E. ORCID: https://orcid.org/0000-0001-9085-9713; Emanuelsson, Daniel B. ORCID: https://orcid.org/0000-0002-9373-6951; Thomas, Elizabeth R. ORCID: https://orcid.org/0000-0002-3010-6493. 2023 Visual Stratigraphy-Based Age Scale Developed for the Shallow Mount Siple Firn Core, Antarctica. Geosciences, 13 (3), 85. 10.3390/geosciences13030085
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Copyright: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/) geosciences-13-00085.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (1MB) | Preview |
Abstract/Summary
Here we present a case study for using visual stratigraphy to date a shallow firn core from coastal West Antarctica. The Mount Siple ice core has the potential to reconstruct climate in this data-sparse region over recent decades. Line scanned images of the 24 m firn core were used to generate a grey-scale, which displays variability consistent with annual cycles. The resulting Mount Siple age scale spans from 1998 ± 1 to 2017 CE. This study demonstrates that the seasonal changes in the grey-scale record provide an independent method of dating firn cores. However, the presence of melt layers at this site has introduced an error of ±1 year. Visual line stratigraphy has the unique advantage over traditional annual layer counting, based on chemical or isotopic species, of being non-destructive and relatively inexpensive. Visual line stratigraphy has proved to be an effective dating method for this site.
Item Type: | Publication - Article |
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Digital Object Identifier (DOI): | 10.3390/geosciences13030085 |
ISSN: | 2076-3263 |
Additional Keywords: | Sub-Antarctic; Ice Cores; Melting; Visual Stratigraphy |
Date made live: | 21 Mar 2023 08:25 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/534246 |
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