Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition
During the mid-Pleistocene transition the dominant 41 ka periodicity of glacial cycles transitioned to a quasi-100 ka periodicity for reasons not yet known. This study investigates the potential role of deep ocean hydrography by examining oxygen isotope ratios in benthic foraminifera. Oxygen isotope...
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2014
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Online Access: | https://hdl.handle.net/1983/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee https://research-information.bris.ac.uk/en/publications/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee https://doi.org/10.1016/j.quascirev.2014.01.020 |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee 2024-04-28T07:59:59+00:00 Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition Bates, Stephanie L Siddall, Mark Waelbroeck, Claire 2014-03-15 https://hdl.handle.net/1983/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee https://research-information.bris.ac.uk/en/publications/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee https://doi.org/10.1016/j.quascirev.2014.01.020 eng eng https://research-information.bris.ac.uk/en/publications/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee info:eu-repo/semantics/restrictedAccess Bates , S L , Siddall , M & Waelbroeck , C 2014 , ' Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition ' , Quaternary Science Reviews , vol. 88 , pp. 147-158 . https://doi.org/10.1016/j.quascirev.2014.01.020 Mid-Pleistocene transition Benthic oxygen isotopes Sea level Deep ocean temperature Ocean circulation ANTARCTIC ICE-SHEET PLEISTOCENE CLIMATE TRANSITIONS FORAMINIFERAL MG/CA-PALEOTHERMOMETRY 100,000-YEAR GLACIAL CYCLES BENTHIC DELTA-O-18 RECORDS OXYGEN-ISOTOPE ANALYSES PLIOCENE WARM PERIOD SOUTHERN-OCEAN SEA-LEVEL NORTH-ATLANTIC article 2014 ftubristolcris https://doi.org/10.1016/j.quascirev.2014.01.020 2024-04-09T23:54:34Z During the mid-Pleistocene transition the dominant 41 ka periodicity of glacial cycles transitioned to a quasi-100 ka periodicity for reasons not yet known. This study investigates the potential role of deep ocean hydrography by examining oxygen isotope ratios in benthic foraminifera. Oxygen isotope records from the Atlantic, Pacific and Indian Ocean basins are separated into their ice volume and local temperature/hydrography components using a piece-wise linear transfer function and a temperature calibration. Although our method has certain limitations, the deep ocean hydrography reconstructions show that glacial deep ocean temperatures approached freezing point as the mid-Pleistocene transition progressed. Further analysis suggests that water mass reorganisation could have been responsible for these temperature changes, leading to such stable conditions in the deep ocean that some obliquity cycles were skipped until precessional forcing triggered deglaciation, creating the apparent quasi-100 ka pattern. This study supports previous work that suggests multiples of obliquity cycles dominate the quasi-100 ka glacial cycles with precession components driving deglaciations. (c) 2014 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet North Atlantic Southern Ocean University of Bristol: Bristol Research Quaternary Science Reviews 88 147 158 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
Mid-Pleistocene transition Benthic oxygen isotopes Sea level Deep ocean temperature Ocean circulation ANTARCTIC ICE-SHEET PLEISTOCENE CLIMATE TRANSITIONS FORAMINIFERAL MG/CA-PALEOTHERMOMETRY 100,000-YEAR GLACIAL CYCLES BENTHIC DELTA-O-18 RECORDS OXYGEN-ISOTOPE ANALYSES PLIOCENE WARM PERIOD SOUTHERN-OCEAN SEA-LEVEL NORTH-ATLANTIC |
spellingShingle |
Mid-Pleistocene transition Benthic oxygen isotopes Sea level Deep ocean temperature Ocean circulation ANTARCTIC ICE-SHEET PLEISTOCENE CLIMATE TRANSITIONS FORAMINIFERAL MG/CA-PALEOTHERMOMETRY 100,000-YEAR GLACIAL CYCLES BENTHIC DELTA-O-18 RECORDS OXYGEN-ISOTOPE ANALYSES PLIOCENE WARM PERIOD SOUTHERN-OCEAN SEA-LEVEL NORTH-ATLANTIC Bates, Stephanie L Siddall, Mark Waelbroeck, Claire Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition |
topic_facet |
Mid-Pleistocene transition Benthic oxygen isotopes Sea level Deep ocean temperature Ocean circulation ANTARCTIC ICE-SHEET PLEISTOCENE CLIMATE TRANSITIONS FORAMINIFERAL MG/CA-PALEOTHERMOMETRY 100,000-YEAR GLACIAL CYCLES BENTHIC DELTA-O-18 RECORDS OXYGEN-ISOTOPE ANALYSES PLIOCENE WARM PERIOD SOUTHERN-OCEAN SEA-LEVEL NORTH-ATLANTIC |
description |
During the mid-Pleistocene transition the dominant 41 ka periodicity of glacial cycles transitioned to a quasi-100 ka periodicity for reasons not yet known. This study investigates the potential role of deep ocean hydrography by examining oxygen isotope ratios in benthic foraminifera. Oxygen isotope records from the Atlantic, Pacific and Indian Ocean basins are separated into their ice volume and local temperature/hydrography components using a piece-wise linear transfer function and a temperature calibration. Although our method has certain limitations, the deep ocean hydrography reconstructions show that glacial deep ocean temperatures approached freezing point as the mid-Pleistocene transition progressed. Further analysis suggests that water mass reorganisation could have been responsible for these temperature changes, leading to such stable conditions in the deep ocean that some obliquity cycles were skipped until precessional forcing triggered deglaciation, creating the apparent quasi-100 ka pattern. This study supports previous work that suggests multiples of obliquity cycles dominate the quasi-100 ka glacial cycles with precession components driving deglaciations. (c) 2014 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Bates, Stephanie L Siddall, Mark Waelbroeck, Claire |
author_facet |
Bates, Stephanie L Siddall, Mark Waelbroeck, Claire |
author_sort |
Bates, Stephanie L |
title |
Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition |
title_short |
Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition |
title_full |
Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition |
title_fullStr |
Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition |
title_full_unstemmed |
Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition |
title_sort |
hydrographic variations in deep ocean temperature over the mid-pleistocene transition |
publishDate |
2014 |
url |
https://hdl.handle.net/1983/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee https://research-information.bris.ac.uk/en/publications/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee https://doi.org/10.1016/j.quascirev.2014.01.020 |
genre |
Antarc* Antarctic Ice Sheet North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet North Atlantic Southern Ocean |
op_source |
Bates , S L , Siddall , M & Waelbroeck , C 2014 , ' Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition ' , Quaternary Science Reviews , vol. 88 , pp. 147-158 . https://doi.org/10.1016/j.quascirev.2014.01.020 |
op_relation |
https://research-information.bris.ac.uk/en/publications/7b9baed3-9c3a-463f-9b9d-fb0f1aab4bee |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2014.01.020 |
container_title |
Quaternary Science Reviews |
container_volume |
88 |
container_start_page |
147 |
op_container_end_page |
158 |
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1797572425367420928 |