Evolution of mean ocean temperature in Marine Isotope Stage 4
Deglaciations are characterized by relatively fast and near-synchronous changes in ice sheet volume, ocean temperature, and atmospheric greenhouse gas concentrations, but glacial inception occurs more gradually. Understanding the evolution of ice sheet, ocean, and atmosphere conditions from intergla...
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ftdoajarticles:oai:doaj.org/article:d11481853d1f4bbdbc4cd1631af426c0 2023-05-15T13:50:11+02:00 Evolution of mean ocean temperature in Marine Isotope Stage 4 S. Shackleton J. A. Menking E. Brook C. Buizert M. N. Dyonisius V. V. Petrenko D. Baggenstos J. P. Severinghaus 2021-10-01T00:00:00Z https://doi.org/10.5194/cp-17-2273-2021 https://doaj.org/article/d11481853d1f4bbdbc4cd1631af426c0 EN eng Copernicus Publications https://cp.copernicus.org/articles/17/2273/2021/cp-17-2273-2021.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-17-2273-2021 1814-9324 1814-9332 https://doaj.org/article/d11481853d1f4bbdbc4cd1631af426c0 Climate of the Past, Vol 17, Pp 2273-2289 (2021) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2021 ftdoajarticles https://doi.org/10.5194/cp-17-2273-2021 2022-12-31T07:46:33Z Deglaciations are characterized by relatively fast and near-synchronous changes in ice sheet volume, ocean temperature, and atmospheric greenhouse gas concentrations, but glacial inception occurs more gradually. Understanding the evolution of ice sheet, ocean, and atmosphere conditions from interglacial to glacial maximum provides insight into the interplay of these components of the climate system. Using noble gas measurements in ancient ice samples, we reconstruct mean ocean temperature (MOT) from 74 to 59.7 ka, covering the Marine Isotope Stage (MIS) 5a–4 boundary, MIS 4, and part of the MIS 4–3 transition. Comparing this MOT reconstruction to previously published MOT reconstructions from the last and penultimate deglaciation, we find that the majority of the last interglacial–glacial ocean cooling must have occurred within MIS 5. MOT reached equally cold conditions in MIS 4 as in MIS 2 ( −2.7 ± 0.3 ∘ C relative to the Holocene, −0.1 ± 0.3 ∘ C relative to MIS 2). Using a carbon cycle model to quantify the CO 2 solubility pump, we show that ocean cooling can explain most of the CO 2 drawdown (32 ± 4 of 40 ppm) across MIS 5. Comparing MOT to contemporaneous records of benthic δ 18 O, we find that ocean cooling can also explain the majority of the δ 18 O increase across MIS 5 (0.7 ‰ of 1.3 ‰). The timing of ocean warming and cooling in the record and the comparison to coeval Antarctic isotope data suggest an intimate link between ocean heat content, Southern Hemisphere high-latitude climate, and ocean circulation on orbital and millennial timescales. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Directory of Open Access Journals: DOAJ Articles Antarctic Climate of the Past 17 5 2273 2289 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 S. Shackleton J. A. Menking E. Brook C. Buizert M. N. Dyonisius V. V. Petrenko D. Baggenstos J. P. Severinghaus Evolution of mean ocean temperature in Marine Isotope Stage 4 |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Deglaciations are characterized by relatively fast and near-synchronous changes in ice sheet volume, ocean temperature, and atmospheric greenhouse gas concentrations, but glacial inception occurs more gradually. Understanding the evolution of ice sheet, ocean, and atmosphere conditions from interglacial to glacial maximum provides insight into the interplay of these components of the climate system. Using noble gas measurements in ancient ice samples, we reconstruct mean ocean temperature (MOT) from 74 to 59.7 ka, covering the Marine Isotope Stage (MIS) 5a–4 boundary, MIS 4, and part of the MIS 4–3 transition. Comparing this MOT reconstruction to previously published MOT reconstructions from the last and penultimate deglaciation, we find that the majority of the last interglacial–glacial ocean cooling must have occurred within MIS 5. MOT reached equally cold conditions in MIS 4 as in MIS 2 ( −2.7 ± 0.3 ∘ C relative to the Holocene, −0.1 ± 0.3 ∘ C relative to MIS 2). Using a carbon cycle model to quantify the CO 2 solubility pump, we show that ocean cooling can explain most of the CO 2 drawdown (32 ± 4 of 40 ppm) across MIS 5. Comparing MOT to contemporaneous records of benthic δ 18 O, we find that ocean cooling can also explain the majority of the δ 18 O increase across MIS 5 (0.7 ‰ of 1.3 ‰). The timing of ocean warming and cooling in the record and the comparison to coeval Antarctic isotope data suggest an intimate link between ocean heat content, Southern Hemisphere high-latitude climate, and ocean circulation on orbital and millennial timescales. |
format |
Article in Journal/Newspaper |
author |
S. Shackleton J. A. Menking E. Brook C. Buizert M. N. Dyonisius V. V. Petrenko D. Baggenstos J. P. Severinghaus |
author_facet |
S. Shackleton J. A. Menking E. Brook C. Buizert M. N. Dyonisius V. V. Petrenko D. Baggenstos J. P. Severinghaus |
author_sort |
S. Shackleton |
title |
Evolution of mean ocean temperature in Marine Isotope Stage 4 |
title_short |
Evolution of mean ocean temperature in Marine Isotope Stage 4 |
title_full |
Evolution of mean ocean temperature in Marine Isotope Stage 4 |
title_fullStr |
Evolution of mean ocean temperature in Marine Isotope Stage 4 |
title_full_unstemmed |
Evolution of mean ocean temperature in Marine Isotope Stage 4 |
title_sort |
evolution of mean ocean temperature in marine isotope stage 4 |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/cp-17-2273-2021 https://doaj.org/article/d11481853d1f4bbdbc4cd1631af426c0 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Climate of the Past, Vol 17, Pp 2273-2289 (2021) |
op_relation |
https://cp.copernicus.org/articles/17/2273/2021/cp-17-2273-2021.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-17-2273-2021 1814-9324 1814-9332 https://doaj.org/article/d11481853d1f4bbdbc4cd1631af426c0 |
op_doi |
https://doi.org/10.5194/cp-17-2273-2021 |
container_title |
Climate of the Past |
container_volume |
17 |
container_issue |
5 |
container_start_page |
2273 |
op_container_end_page |
2289 |
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1766253200573202432 |