Dating a tropical ice core by time–frequency analysis of ion concentration depth profiles
International audience Ice core dating is a key parameter for the inter-pretation of the ice archives. However, the relationship be-tween ice depth and ice age generally cannot be easily es-tablished and requires the combination of numerous investi-gations and/or modelling efforts. This paper presen...
Published in: | Climate of the Past |
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Main Authors: | , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2014
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Online Access: | https://hal.science/hal-01118398 https://hal.science/hal-01118398/document https://hal.science/hal-01118398/file/Gay2014_CP.pdf https://doi.org/10.5194/cp-10-1-2014 |
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Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
Signal Datation Ice core [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing [SDE]Environmental Sciences [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
Signal Datation Ice core [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing [SDE]Environmental Sciences [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Gay, Michel de Angelis, M Lacoume, Jean-Louis Dating a tropical ice core by time–frequency analysis of ion concentration depth profiles |
topic_facet |
Signal Datation Ice core [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing [SDE]Environmental Sciences [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience Ice core dating is a key parameter for the inter-pretation of the ice archives. However, the relationship be-tween ice depth and ice age generally cannot be easily es-tablished and requires the combination of numerous investi-gations and/or modelling efforts. This paper presents a new approach to ice core dating based on time–frequency anal-ysis of chemical profiles at a site where seasonal patterns may be significantly distorted by sporadic events of regional importance, specifically at the summit area of Nevado Illi-mani (6350 m a.s.l.), located in the eastern Bolivian Andes (16 37 0 S, 67 46 0 W). We used ion concentration depth pro-files collected along a 100 m deep ice core. The results of Fourier time–frequency and wavelet transforms were first compared. Both methods were applied to a nitrate concentra-tion depth profile. The resulting chronologies were checked by comparison with the multi-proxy year-by-year dating published by de Angelis et al. (2003) and with volcanic tie points. With this first experiment, we demonstrated the effi-ciency of Fourier time–frequency analysis when tracking the nitrate natural variability. In addition, we were able to show spectrum aliasing due to under-sampling below 70 m. In this article, we propose a method of de-aliasing which signifi-cantly improves the core dating in comparison with annual layer manual counting. Fourier time–frequency analysis was applied to concentration depth profiles of seven other ions, providing information on the suitability of each of them for the dating of tropical Andean ice cores. |
author2 |
GIPSA-Services (GIPSA-Services) Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) GIPSA - Signal Images Physique (GIPSA-SIGMAPHY) Département Images et Signal (GIPSA-DIS) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Gay, Michel de Angelis, M Lacoume, Jean-Louis |
author_facet |
Gay, Michel de Angelis, M Lacoume, Jean-Louis |
author_sort |
Gay, Michel |
title |
Dating a tropical ice core by time–frequency analysis of ion concentration depth profiles |
title_short |
Dating a tropical ice core by time–frequency analysis of ion concentration depth profiles |
title_full |
Dating a tropical ice core by time–frequency analysis of ion concentration depth profiles |
title_fullStr |
Dating a tropical ice core by time–frequency analysis of ion concentration depth profiles |
title_full_unstemmed |
Dating a tropical ice core by time–frequency analysis of ion concentration depth profiles |
title_sort |
dating a tropical ice core by time–frequency analysis of ion concentration depth profiles |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-01118398 https://hal.science/hal-01118398/document https://hal.science/hal-01118398/file/Gay2014_CP.pdf https://doi.org/10.5194/cp-10-1-2014 |
genre |
ice core |
genre_facet |
ice core |
op_source |
ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.science/hal-01118398 Climate of the Past Discussions, 2014, 10, pp.1 - 15. ⟨10.5194/cp-10-1-2014⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-10-1-2014 hal-01118398 https://hal.science/hal-01118398 https://hal.science/hal-01118398/document https://hal.science/hal-01118398/file/Gay2014_CP.pdf doi:10.5194/cp-10-1-2014 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-10-1-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
19 |
_version_ |
1798847439134785536 |
spelling |
ftunigrenoble:oai:HAL:hal-01118398v1 2024-05-12T08:05:10+00:00 Dating a tropical ice core by time–frequency analysis of ion concentration depth profiles Gay, Michel de Angelis, M Lacoume, Jean-Louis GIPSA-Services (GIPSA-Services) Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) GIPSA - Signal Images Physique (GIPSA-SIGMAPHY) Département Images et Signal (GIPSA-DIS) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2014 https://hal.science/hal-01118398 https://hal.science/hal-01118398/document https://hal.science/hal-01118398/file/Gay2014_CP.pdf https://doi.org/10.5194/cp-10-1-2014 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-10-1-2014 hal-01118398 https://hal.science/hal-01118398 https://hal.science/hal-01118398/document https://hal.science/hal-01118398/file/Gay2014_CP.pdf doi:10.5194/cp-10-1-2014 info:eu-repo/semantics/OpenAccess ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.science/hal-01118398 Climate of the Past Discussions, 2014, 10, pp.1 - 15. ⟨10.5194/cp-10-1-2014⟩ Signal Datation Ice core [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing [SDE]Environmental Sciences [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis Statistics and Probability [physics.data-an] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2014 ftunigrenoble https://doi.org/10.5194/cp-10-1-2014 2024-04-18T04:28:48Z International audience Ice core dating is a key parameter for the inter-pretation of the ice archives. However, the relationship be-tween ice depth and ice age generally cannot be easily es-tablished and requires the combination of numerous investi-gations and/or modelling efforts. This paper presents a new approach to ice core dating based on time–frequency anal-ysis of chemical profiles at a site where seasonal patterns may be significantly distorted by sporadic events of regional importance, specifically at the summit area of Nevado Illi-mani (6350 m a.s.l.), located in the eastern Bolivian Andes (16 37 0 S, 67 46 0 W). We used ion concentration depth pro-files collected along a 100 m deep ice core. The results of Fourier time–frequency and wavelet transforms were first compared. Both methods were applied to a nitrate concentra-tion depth profile. The resulting chronologies were checked by comparison with the multi-proxy year-by-year dating published by de Angelis et al. (2003) and with volcanic tie points. With this first experiment, we demonstrated the effi-ciency of Fourier time–frequency analysis when tracking the nitrate natural variability. In addition, we were able to show spectrum aliasing due to under-sampling below 70 m. In this article, we propose a method of de-aliasing which signifi-cantly improves the core dating in comparison with annual layer manual counting. Fourier time–frequency analysis was applied to concentration depth profiles of seven other ions, providing information on the suitability of each of them for the dating of tropical Andean ice cores. Article in Journal/Newspaper ice core Université Grenoble Alpes: HAL Climate of the Past 10 1 1 19 |