Past sea ice variability and climate reconstructions in East Antarctica, Adélie Land, over the Late Holocene period
Antarctic sea ice has large impacts on the heat and gas transfers between the ocean andthe atmosphere, on the global oceanic circulation, on the Earth albedo and on theprimary productivity of the Southern Ocean. However, because of its remote and icecoveredlocation, the climate of the Antarctic cont...
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Other Authors: | , , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2015
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Online Access: | https://theses.hal.science/tel-01306576 https://theses.hal.science/tel-01306576/document https://theses.hal.science/tel-01306576/file/CAMPAGNE_PHILIPPINE_2015.pdf |
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ftinsu:oai:HAL:tel-01306576v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
French |
topic |
Late Holocene Adélie Land Sea ice Diatoms HBIs Forcings Holocène tardif Terre Adélie Banquise Diatomées Forçages [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
Late Holocene Adélie Land Sea ice Diatoms HBIs Forcings Holocène tardif Terre Adélie Banquise Diatomées Forçages [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Campagne, Philippine Past sea ice variability and climate reconstructions in East Antarctica, Adélie Land, over the Late Holocene period |
topic_facet |
Late Holocene Adélie Land Sea ice Diatoms HBIs Forcings Holocène tardif Terre Adélie Banquise Diatomées Forçages [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
Antarctic sea ice has large impacts on the heat and gas transfers between the ocean andthe atmosphere, on the global oceanic circulation, on the Earth albedo and on theprimary productivity of the Southern Ocean. However, because of its remote and icecoveredlocation, the climate of the Antarctic continent and of the Southern Ocean isstill poorly studied and constitutes a challenge for climate model predictions. Recentobservations highlighted opposite patterns of climate variability between Western andEastern Antarctica, but poorly resolved the mechanisms and forcing involved.Reconstructions of temperature signals indicate that regional disparities have persistedover the Holocene period. The Late Holocene period includes the recent climate change(so-called modern global warming) as well as preceding rapid climate variabilitiesthough of lower amplitude. Achieving paleoenvironmental reconstructions in theAntarctic region at high temporal resolution over this period therefore offers theopportunity to improve the understanding of climate changes in response to bothnatural and anthropogenic forcing. While paleoenvironmental records obtained from icecores provide robust information on the past atmospheric conditions over Antarctica,the paleoceanography of the nearby ocean is constrained by a limited set of rather lowresolution, discontinuous records from sediment cores. Our study focuses on themarginal zone of the Adélie-Georges V Land, East Antarctica, a region which has beenpoorly studied so far, despite the presence of thick and laminated sedimentary depositsthat allow accurate and high resolution paleoclimate reconstructions. Our work is basedon several marine sedimentary records, made of diatom oozes and covering theinstrumental period to the last 2,000 years. Our results show that diatom assemblages,diatom specific biomarkers (HBI) and elemental geochemistry in the sedimenteffectively testify of local but also regional oceanographic and climatic variations atdecadal to centennial scales. Coupled atmospheric and ... |
author2 |
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) Université de Bordeaux Xavier Crosta Guillaume Massé |
format |
Doctoral or Postdoctoral Thesis |
author |
Campagne, Philippine |
author_facet |
Campagne, Philippine |
author_sort |
Campagne, Philippine |
title |
Past sea ice variability and climate reconstructions in East Antarctica, Adélie Land, over the Late Holocene period |
title_short |
Past sea ice variability and climate reconstructions in East Antarctica, Adélie Land, over the Late Holocene period |
title_full |
Past sea ice variability and climate reconstructions in East Antarctica, Adélie Land, over the Late Holocene period |
title_fullStr |
Past sea ice variability and climate reconstructions in East Antarctica, Adélie Land, over the Late Holocene period |
title_full_unstemmed |
Past sea ice variability and climate reconstructions in East Antarctica, Adélie Land, over the Late Holocene period |
title_sort |
past sea ice variability and climate reconstructions in east antarctica, adélie land, over the late holocene period |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://theses.hal.science/tel-01306576 https://theses.hal.science/tel-01306576/document https://theses.hal.science/tel-01306576/file/CAMPAGNE_PHILIPPINE_2015.pdf |
long_lat |
ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctica Terre Adélie Terre-Adélie |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctica Terre Adélie Terre-Adélie |
genre |
Antarc* Antarctic Antarctica Antarctique* banquise East Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Antarctique* banquise East Antarctica Sea ice Southern Ocean |
op_source |
https://theses.hal.science/tel-01306576 Sciences de la Terre. Université de Bordeaux, 2015. Français. ⟨NNT : 2015BORD0315⟩ |
op_relation |
NNT: 2015BORD0315 tel-01306576 https://theses.hal.science/tel-01306576 https://theses.hal.science/tel-01306576/document https://theses.hal.science/tel-01306576/file/CAMPAGNE_PHILIPPINE_2015.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1780742598702399488 |
spelling |
ftinsu:oai:HAL:tel-01306576v1 2023-10-25T01:30:56+02:00 Past sea ice variability and climate reconstructions in East Antarctica, Adélie Land, over the Late Holocene period Étude de la variabilité des conditions océanographiques et climatiques en Antarctique de l'Est (Terre Adélie-Georges V) au cours de l'Holocène tardif et de la période instrumentale Campagne, Philippine 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) Université de Bordeaux Xavier Crosta Guillaume Massé 2015-12-18 https://theses.hal.science/tel-01306576 https://theses.hal.science/tel-01306576/document https://theses.hal.science/tel-01306576/file/CAMPAGNE_PHILIPPINE_2015.pdf fr fre HAL CCSD NNT: 2015BORD0315 tel-01306576 https://theses.hal.science/tel-01306576 https://theses.hal.science/tel-01306576/document https://theses.hal.science/tel-01306576/file/CAMPAGNE_PHILIPPINE_2015.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01306576 Sciences de la Terre. Université de Bordeaux, 2015. Français. ⟨NNT : 2015BORD0315⟩ Late Holocene Adélie Land Sea ice Diatoms HBIs Forcings Holocène tardif Terre Adélie Banquise Diatomées Forçages [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/doctoralThesis Theses 2015 ftinsu 2023-09-27T16:23:48Z Antarctic sea ice has large impacts on the heat and gas transfers between the ocean andthe atmosphere, on the global oceanic circulation, on the Earth albedo and on theprimary productivity of the Southern Ocean. However, because of its remote and icecoveredlocation, the climate of the Antarctic continent and of the Southern Ocean isstill poorly studied and constitutes a challenge for climate model predictions. Recentobservations highlighted opposite patterns of climate variability between Western andEastern Antarctica, but poorly resolved the mechanisms and forcing involved.Reconstructions of temperature signals indicate that regional disparities have persistedover the Holocene period. The Late Holocene period includes the recent climate change(so-called modern global warming) as well as preceding rapid climate variabilitiesthough of lower amplitude. Achieving paleoenvironmental reconstructions in theAntarctic region at high temporal resolution over this period therefore offers theopportunity to improve the understanding of climate changes in response to bothnatural and anthropogenic forcing. While paleoenvironmental records obtained from icecores provide robust information on the past atmospheric conditions over Antarctica,the paleoceanography of the nearby ocean is constrained by a limited set of rather lowresolution, discontinuous records from sediment cores. Our study focuses on themarginal zone of the Adélie-Georges V Land, East Antarctica, a region which has beenpoorly studied so far, despite the presence of thick and laminated sedimentary depositsthat allow accurate and high resolution paleoclimate reconstructions. Our work is basedon several marine sedimentary records, made of diatom oozes and covering theinstrumental period to the last 2,000 years. Our results show that diatom assemblages,diatom specific biomarkers (HBI) and elemental geochemistry in the sedimenteffectively testify of local but also regional oceanographic and climatic variations atdecadal to centennial scales. Coupled atmospheric and ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica Antarctique* banquise East Antarctica Sea ice Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Antarctic Southern Ocean The Antarctic East Antarctica Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) |