Dataset.
Data from: Detection of tephra layers in Antarctic sediment cores with hyperspectral imaging
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/281800
Digital.CSIC. Repositorio Institucional del CSIC
- Aymerich, Ismael F.
- Oliva, Marc
- Giralt, Santiago
- Martín-Herrero, Julio
Data_IsmaelAymerich_PLOSONE_2015
Excel file containing hyperspectral signatures of tephra and No-tephra samples extracted from an Antarctic sediment core. Tephra signatures are labelled 1, while No-tephra spectra are labelled 0., 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., Peer reviewed
DOI: http://hdl.handle.net/10261/281800, http://datadryad.org/stash/dataset/doi:10.5061/dryad.v2st1
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/281800
HANDLE: http://hdl.handle.net/10261/281800, http://datadryad.org/stash/dataset/doi:10.5061/dryad.v2st1
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/281800
Ver en: http://hdl.handle.net/10261/281800, http://datadryad.org/stash/dataset/doi:10.5061/dryad.v2st1
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/281800
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1 Versiones
1 Versiones
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/281800
Dataset. 2016
DATA FROM: DETECTION OF TEPHRA LAYERS IN ANTARCTIC SEDIMENT CORES WITH HYPERSPECTRAL IMAGING
Digital.CSIC. Repositorio Institucional del CSIC
- Aymerich, Ismael F.
- Oliva, Marc
- Giralt, Santiago
- Martín-Herrero, Julio
Data_IsmaelAymerich_PLOSONE_2015
Excel file containing hyperspectral signatures of tephra and No-tephra samples extracted from an Antarctic sediment core. Tephra signatures are labelled 1, while No-tephra spectra are labelled 0., 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., Peer reviewed
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