An automated approach for annual layer counting in ice cores
A novel method for automated annual layer counting in seasonally-resolved paleoclimate records has been developed. It relies on algorithms from the statistical framework of hidden Markov models (HMMs), which originally was developed for use in machine speech recognition. The strength of the layer de...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2012
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-8-1881-2012 https://noa.gwlb.de/receive/cop_mods_00023798 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023753/cp-8-1881-2012.pdf https://cp.copernicus.org/articles/8/1881/2012/cp-8-1881-2012.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00023798 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00023798 2023-05-15T16:29:11+02:00 An automated approach for annual layer counting in ice cores Winstrup, M. Svensson, A. M. Rasmussen, S. O. Winther, O. Steig, E. J. Axelrod, A. E. 2012-11 electronic https://doi.org/10.5194/cp-8-1881-2012 https://noa.gwlb.de/receive/cop_mods_00023798 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023753/cp-8-1881-2012.pdf https://cp.copernicus.org/articles/8/1881/2012/cp-8-1881-2012.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-8-1881-2012 https://noa.gwlb.de/receive/cop_mods_00023798 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023753/cp-8-1881-2012.pdf https://cp.copernicus.org/articles/8/1881/2012/cp-8-1881-2012.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2012 ftnonlinearchiv https://doi.org/10.5194/cp-8-1881-2012 2022-02-08T22:50:26Z A novel method for automated annual layer counting in seasonally-resolved paleoclimate records has been developed. It relies on algorithms from the statistical framework of hidden Markov models (HMMs), which originally was developed for use in machine speech recognition. The strength of the layer detection algorithm lies in the way it is able to imitate the manual procedures for annual layer counting, while being based on statistical criteria for annual layer identification. The most likely positions of multiple layer boundaries in a section of ice core data are determined simultaneously, and a probabilistic uncertainty estimate of the resulting layer count is provided, ensuring an objective treatment of ambiguous layers in the data. Furthermore, multiple data series can be incorporated and used simultaneously. In this study, the automated layer counting algorithm has been applied to two ice core records from Greenland: one displaying a distinct annual signal and one which is more challenging. The algorithm shows high skill in reproducing the results from manual layer counts, and the resulting timescale compares well to absolute-dated volcanic marker horizons where these exist. Article in Journal/Newspaper Greenland ice core Niedersächsisches Online-Archiv NOA Greenland Climate of the Past 8 6 1881 1895 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Winstrup, M. Svensson, A. M. Rasmussen, S. O. Winther, O. Steig, E. J. Axelrod, A. E. An automated approach for annual layer counting in ice cores |
topic_facet |
article Verlagsveröffentlichung |
description |
A novel method for automated annual layer counting in seasonally-resolved paleoclimate records has been developed. It relies on algorithms from the statistical framework of hidden Markov models (HMMs), which originally was developed for use in machine speech recognition. The strength of the layer detection algorithm lies in the way it is able to imitate the manual procedures for annual layer counting, while being based on statistical criteria for annual layer identification. The most likely positions of multiple layer boundaries in a section of ice core data are determined simultaneously, and a probabilistic uncertainty estimate of the resulting layer count is provided, ensuring an objective treatment of ambiguous layers in the data. Furthermore, multiple data series can be incorporated and used simultaneously. In this study, the automated layer counting algorithm has been applied to two ice core records from Greenland: one displaying a distinct annual signal and one which is more challenging. The algorithm shows high skill in reproducing the results from manual layer counts, and the resulting timescale compares well to absolute-dated volcanic marker horizons where these exist. |
format |
Article in Journal/Newspaper |
author |
Winstrup, M. Svensson, A. M. Rasmussen, S. O. Winther, O. Steig, E. J. Axelrod, A. E. |
author_facet |
Winstrup, M. Svensson, A. M. Rasmussen, S. O. Winther, O. Steig, E. J. Axelrod, A. E. |
author_sort |
Winstrup, M. |
title |
An automated approach for annual layer counting in ice cores |
title_short |
An automated approach for annual layer counting in ice cores |
title_full |
An automated approach for annual layer counting in ice cores |
title_fullStr |
An automated approach for annual layer counting in ice cores |
title_full_unstemmed |
An automated approach for annual layer counting in ice cores |
title_sort |
automated approach for annual layer counting in ice cores |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-1881-2012 https://noa.gwlb.de/receive/cop_mods_00023798 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023753/cp-8-1881-2012.pdf https://cp.copernicus.org/articles/8/1881/2012/cp-8-1881-2012.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core |
genre_facet |
Greenland ice core |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-8-1881-2012 https://noa.gwlb.de/receive/cop_mods_00023798 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023753/cp-8-1881-2012.pdf https://cp.copernicus.org/articles/8/1881/2012/cp-8-1881-2012.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-8-1881-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
6 |
container_start_page |
1881 |
op_container_end_page |
1895 |
_version_ |
1766018867291750400 |