Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging.
Tephrochronology uses recognizable volcanic ash layers (from airborne pyroclastic deposits, or tephras) in geological strata to set unique time references for paleoenvironmental events across wide geographic areas. This involves the detection of tephra layers which sometimes are not evident to the n...
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ftdoajarticles:oai:doaj.org/article:af6b94c11ddd4b75a50e9caa43f58081 2023-05-15T14:00:33+02:00 Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging. Ismael F Aymerich Marc Oliva Santiago Giralt Julio Martín-Herrero 2016-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0146578 https://doaj.org/article/af6b94c11ddd4b75a50e9caa43f58081 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4731387?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0146578 https://doaj.org/article/af6b94c11ddd4b75a50e9caa43f58081 PLoS ONE, Vol 11, Iss 1, p e0146578 (2016) Medicine R Science Q article 2016 ftdoajarticles https://doi.org/10.1371/journal.pone.0146578 2022-12-31T14:31:31Z Tephrochronology uses recognizable volcanic ash layers (from airborne pyroclastic deposits, or tephras) in geological strata to set unique time references for paleoenvironmental events across wide geographic areas. This involves the detection of tephra layers which sometimes are not evident to the naked eye, including the so-called cryptotephras. Tests that are expensive, time-consuming, and/or destructive are often required. Destructive testing for tephra layers of cores from difficult regions, such as Antarctica, which are useful sources of other kinds of information beyond tephras, is always undesirable. Here we propose hyperspectral imaging of cores, Self-Organizing Map (SOM) clustering of the preprocessed spectral signatures, and spatial analysis of the classified images as a convenient, fast, non-destructive method for tephra detection. We test the method in five sediment cores from three Antarctic lakes, and show its potential for detection of tephras and cryptotephras. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic PLOS ONE 11 1 e0146578 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Ismael F Aymerich Marc Oliva Santiago Giralt Julio Martín-Herrero Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging. |
topic_facet |
Medicine R Science Q |
description |
Tephrochronology uses recognizable volcanic ash layers (from airborne pyroclastic deposits, or tephras) in geological strata to set unique time references for paleoenvironmental events across wide geographic areas. This involves the detection of tephra layers which sometimes are not evident to the naked eye, including the so-called cryptotephras. Tests that are expensive, time-consuming, and/or destructive are often required. Destructive testing for tephra layers of cores from difficult regions, such as Antarctica, which are useful sources of other kinds of information beyond tephras, is always undesirable. Here we propose hyperspectral imaging of cores, Self-Organizing Map (SOM) clustering of the preprocessed spectral signatures, and spatial analysis of the classified images as a convenient, fast, non-destructive method for tephra detection. We test the method in five sediment cores from three Antarctic lakes, and show its potential for detection of tephras and cryptotephras. |
format |
Article in Journal/Newspaper |
author |
Ismael F Aymerich Marc Oliva Santiago Giralt Julio Martín-Herrero |
author_facet |
Ismael F Aymerich Marc Oliva Santiago Giralt Julio Martín-Herrero |
author_sort |
Ismael F Aymerich |
title |
Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging. |
title_short |
Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging. |
title_full |
Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging. |
title_fullStr |
Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging. |
title_full_unstemmed |
Detection of Tephra Layers in Antarctic Sediment Cores with Hyperspectral Imaging. |
title_sort |
detection of tephra layers in antarctic sediment cores with hyperspectral imaging. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2016 |
url |
https://doi.org/10.1371/journal.pone.0146578 https://doaj.org/article/af6b94c11ddd4b75a50e9caa43f58081 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
PLoS ONE, Vol 11, Iss 1, p e0146578 (2016) |
op_relation |
http://europepmc.org/articles/PMC4731387?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0146578 https://doaj.org/article/af6b94c11ddd4b75a50e9caa43f58081 |
op_doi |
https://doi.org/10.1371/journal.pone.0146578 |
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PLOS ONE |
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11 |
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1 |
container_start_page |
e0146578 |
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1766269729468579840 |