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 |
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Language: | English |
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2012
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Online Access: | https://orbit.dtu.dk/en/publications/af011a63-7317-46d5-991d-65bb4a26b2d0 https://doi.org/10.5194/cp-8-1881-2012 https://backend.orbit.dtu.dk/ws/files/51593191/cp_8_1881_2012.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/af011a63-7317-46d5-991d-65bb4a26b2d0 2024-09-15T18:09:49+00:00 An automated approach for annual layer counting in ice cores Winstrup, Mai Svensson, A. M. Rasmussen, S. O. Winther, Ole Steig, E. J. Axelrod, A. E. 2012 application/pdf https://orbit.dtu.dk/en/publications/af011a63-7317-46d5-991d-65bb4a26b2d0 https://doi.org/10.5194/cp-8-1881-2012 https://backend.orbit.dtu.dk/ws/files/51593191/cp_8_1881_2012.pdf eng eng https://orbit.dtu.dk/en/publications/af011a63-7317-46d5-991d-65bb4a26b2d0 info:eu-repo/semantics/openAccess Winstrup , M , Svensson , A M , Rasmussen , S O , Winther , O , Steig , E J & Axelrod , A E 2012 , ' An automated approach for annual layer counting in ice cores ' , Climate of the Past Discussions , vol. 8 , no. 6 , pp. 1881-1895 . https://doi.org/10.5194/cp-8-1881-2012 article 2012 ftdtupubl https://doi.org/10.5194/cp-8-1881-2012 2024-07-08T23:51:45Z 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 Technical University of Denmark: DTU Orbit Climate of the Past 8 6 1881 1895 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
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, Mai Svensson, A. M. Rasmussen, S. O. Winther, Ole Steig, E. J. Axelrod, A. E. |
spellingShingle |
Winstrup, Mai Svensson, A. M. Rasmussen, S. O. Winther, Ole Steig, E. J. Axelrod, A. E. An automated approach for annual layer counting in ice cores |
author_facet |
Winstrup, Mai Svensson, A. M. Rasmussen, S. O. Winther, Ole Steig, E. J. Axelrod, A. E. |
author_sort |
Winstrup, Mai |
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 |
publishDate |
2012 |
url |
https://orbit.dtu.dk/en/publications/af011a63-7317-46d5-991d-65bb4a26b2d0 https://doi.org/10.5194/cp-8-1881-2012 https://backend.orbit.dtu.dk/ws/files/51593191/cp_8_1881_2012.pdf |
genre |
Greenland ice core |
genre_facet |
Greenland ice core |
op_source |
Winstrup , M , Svensson , A M , Rasmussen , S O , Winther , O , Steig , E J & Axelrod , A E 2012 , ' An automated approach for annual layer counting in ice cores ' , Climate of the Past Discussions , vol. 8 , no. 6 , pp. 1881-1895 . https://doi.org/10.5194/cp-8-1881-2012 |
op_relation |
https://orbit.dtu.dk/en/publications/af011a63-7317-46d5-991d-65bb4a26b2d0 |
op_rights |
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 |
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1810447410257723392 |