Potential and limitations of marine and ice core sea ice proxies: an example from the Indian Ocean sector
International audience Diatom assemblages in marine cores and sea salt deposition fluxes in ice cores have been used as sea ice proxies in the southern hemisphere. Here, a marine and an ice core proxy record for the Indian Ocean covering the last two glacial cycles are compared in order to illustrat...
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ftecolephe:oai:HAL:hal-02105659v1 2024-05-19T07:31:41+00:00 Potential and limitations of marine and ice core sea ice proxies: an example from the Indian Ocean sector Röthlisberger, Regine Crosta, Xavier Abram, Nerilie, S Armand, Leanne Wolff, Eric British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Australian National University (ANU) Department of Biological Sciences North Ryde Macquarie University 2010 https://hal.science/hal-02105659 https://doi.org/10.1016/j.quascirev.2009.10.005 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2009.10.005 hal-02105659 https://hal.science/hal-02105659 doi:10.1016/j.quascirev.2009.10.005 ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-02105659 Quaternary Science Reviews, 2010, 29 (1-2), pp.296-302. ⟨10.1016/j.quascirev.2009.10.005⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2010 ftecolephe https://doi.org/10.1016/j.quascirev.2009.10.005 2024-04-25T01:48:18Z International audience Diatom assemblages in marine cores and sea salt deposition fluxes in ice cores have been used as sea ice proxies in the southern hemisphere. Here, a marine and an ice core proxy record for the Indian Ocean covering the last two glacial cycles are compared in order to illustrate their potential and limitations. The marine core was extracted in a location completely ice free under present-day conditions, and therefore was unable to record changes to the recent sea ice extent. Similarly, no sea ice was recorded at that location during the previous interglacial period. During the last glacial period, however, the site was seasonally covered by sea ice, and the diatom assemblages allowed an estimation of average seasonal sea ice presence. The ice core data originated from the East Antarctic plateau. The marine sodium present in the ice core was used as a proxy of the sea-ice coverage and, on average, a larger sea ice surface led to an increased sea-salt aerosol flux, seen e.g. at the last glacial inception. However, the response of the sea salt flux to increasing sea ice extent diminished during peak glacial conditions when only minimal variability was recorded in the ice core record. A first-order approximation is used to take this non-linear response of the ice core sea ice proxy into account. Based on the ice core proxy record, sea ice extent was reduced considerably during the warm episodes of the previous two interglacial periods compared to modern sea ice extent, in particular during the peak warmth of the Last Interglacial. The ice core proxy also showed a very strong precessional variability (pronounced spectral peak at 23 ka period) over the past 240 ka. The advantage of combining the two proxy records lies in the complementary nature of their response. While the ice core proxy showed limited sensitivity during full glacial conditions, the marine proxy recorded the seasonal sea-ice coverage. Once the sea ice retreated south of the location of the marine core, the ice core proxy ... Article in Journal/Newspaper Antarc* Antarctic ice core Sea ice EPHE (Ecole pratique des hautes études, Paris): HAL Quaternary Science Reviews 29 1-2 296 302 |
institution |
Open Polar |
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EPHE (Ecole pratique des hautes études, Paris): HAL |
op_collection_id |
ftecolephe |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Röthlisberger, Regine Crosta, Xavier Abram, Nerilie, S Armand, Leanne Wolff, Eric Potential and limitations of marine and ice core sea ice proxies: an example from the Indian Ocean sector |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Diatom assemblages in marine cores and sea salt deposition fluxes in ice cores have been used as sea ice proxies in the southern hemisphere. Here, a marine and an ice core proxy record for the Indian Ocean covering the last two glacial cycles are compared in order to illustrate their potential and limitations. The marine core was extracted in a location completely ice free under present-day conditions, and therefore was unable to record changes to the recent sea ice extent. Similarly, no sea ice was recorded at that location during the previous interglacial period. During the last glacial period, however, the site was seasonally covered by sea ice, and the diatom assemblages allowed an estimation of average seasonal sea ice presence. The ice core data originated from the East Antarctic plateau. The marine sodium present in the ice core was used as a proxy of the sea-ice coverage and, on average, a larger sea ice surface led to an increased sea-salt aerosol flux, seen e.g. at the last glacial inception. However, the response of the sea salt flux to increasing sea ice extent diminished during peak glacial conditions when only minimal variability was recorded in the ice core record. A first-order approximation is used to take this non-linear response of the ice core sea ice proxy into account. Based on the ice core proxy record, sea ice extent was reduced considerably during the warm episodes of the previous two interglacial periods compared to modern sea ice extent, in particular during the peak warmth of the Last Interglacial. The ice core proxy also showed a very strong precessional variability (pronounced spectral peak at 23 ka period) over the past 240 ka. The advantage of combining the two proxy records lies in the complementary nature of their response. While the ice core proxy showed limited sensitivity during full glacial conditions, the marine proxy recorded the seasonal sea-ice coverage. Once the sea ice retreated south of the location of the marine core, the ice core proxy ... |
author2 |
British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Australian National University (ANU) Department of Biological Sciences North Ryde Macquarie University |
format |
Article in Journal/Newspaper |
author |
Röthlisberger, Regine Crosta, Xavier Abram, Nerilie, S Armand, Leanne Wolff, Eric |
author_facet |
Röthlisberger, Regine Crosta, Xavier Abram, Nerilie, S Armand, Leanne Wolff, Eric |
author_sort |
Röthlisberger, Regine |
title |
Potential and limitations of marine and ice core sea ice proxies: an example from the Indian Ocean sector |
title_short |
Potential and limitations of marine and ice core sea ice proxies: an example from the Indian Ocean sector |
title_full |
Potential and limitations of marine and ice core sea ice proxies: an example from the Indian Ocean sector |
title_fullStr |
Potential and limitations of marine and ice core sea ice proxies: an example from the Indian Ocean sector |
title_full_unstemmed |
Potential and limitations of marine and ice core sea ice proxies: an example from the Indian Ocean sector |
title_sort |
potential and limitations of marine and ice core sea ice proxies: an example from the indian ocean sector |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-02105659 https://doi.org/10.1016/j.quascirev.2009.10.005 |
genre |
Antarc* Antarctic ice core Sea ice |
genre_facet |
Antarc* Antarctic ice core Sea ice |
op_source |
ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-02105659 Quaternary Science Reviews, 2010, 29 (1-2), pp.296-302. ⟨10.1016/j.quascirev.2009.10.005⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2009.10.005 hal-02105659 https://hal.science/hal-02105659 doi:10.1016/j.quascirev.2009.10.005 |
op_doi |
https://doi.org/10.1016/j.quascirev.2009.10.005 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
1-2 |
container_start_page |
296 |
op_container_end_page |
302 |
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1799469564683091968 |