Chapter 10 - Pleistocene Antarctic climate variability: ice sheet – ocean – climate interactions
During the Pleistocene, Earth experienced high-amplitude fluctuations in global temperature, atmospheric composition, ice sheet extent, and sea level that were forced by orbital variations in the seasonal distribution of solar energy across the planet. Subtle cyclical variations in forcing were grea...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10113851 2023-12-24T10:11:30+01:00 Chapter 10 - Pleistocene Antarctic climate variability: ice sheet – ocean – climate interactions Wilson, D van de Flierdt, T McKay, RM Naish, TR Florindo, F Siegert, M de Santis, L Naish, T 2022 text https://discovery.ucl.ac.uk/id/eprint/10113851/7/Wilson%20et%20al%202021%20ACE2%20Pleistocene%20chapter%20final%20Feb%202021.pdf https://discovery.ucl.ac.uk/id/eprint/10113851/ eng eng Elsevier https://discovery.ucl.ac.uk/id/eprint/10113851/7/Wilson%20et%20al%202021%20ACE2%20Pleistocene%20chapter%20final%20Feb%202021.pdf https://discovery.ucl.ac.uk/id/eprint/10113851/ open In: Florindo, F and Siegert, M and de Santis, L and Naish, T, (eds.) Antarctic Climate Evolution. (pp. 465-529). Elsevier (2022) Book chapter 2022 ftucl 2023-11-27T13:07:34Z During the Pleistocene, Earth experienced high-amplitude fluctuations in global temperature, atmospheric composition, ice sheet extent, and sea level that were forced by orbital variations in the seasonal distribution of solar energy across the planet. Subtle cyclical variations in forcing were greatly amplified by internal feedbacks in the Earth system, with processes in the polar regions influential for pole-to-equator temperature gradients and atmospheric carbon dioxide levels. Exploring the behaviour of the polar ice sheets and the Southern Ocean during this interval is crucial for understanding how the climate system operates and for constraining its sensitivity to future changes. Southern Ocean processes, including wind-driven upwelling, sea-ice formation, deep water production, and biological productivity, were instrumental in regulating Earth’s atmospheric carbon dioxide levels through Pleistocene glacial-interglacial cycles. On millennial timescales, rapid changes in ocean and atmospheric circulation were influenced by meltwater input from unstable ice sheet margins in both hemispheres, leading to highly variable regional and interhemispheric climate responses. This chapter provides an overview of the tools used in marine sediment and ice core archives to reconstruct Pleistocene changes in the Earth system. We discuss the mechanisms that controlled Earth’s climate over different timescales, and review the latest evidence that is revealing how the Antarctic Ice Sheet has both influenced and responded to Pleistocene climate change, including during intervals when Earth’s climate was similar to near-future projections. Despite experiencing ice volume changes that were modest in comparison to the advance and retreat of large Northern Hemisphere ice sheets, Antarctica has been a very active player in the ice sheet-ocean-climate system of the past 2.6 million years, and evidence increasingly suggests that it could respond dramatically to anthropogenic warming. Book Part Antarc* Antarctic Antarctica ice core Ice Sheet Sea ice Southern Ocean University College London: UCL Discovery Antarctic Southern Ocean The Antarctic |
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During the Pleistocene, Earth experienced high-amplitude fluctuations in global temperature, atmospheric composition, ice sheet extent, and sea level that were forced by orbital variations in the seasonal distribution of solar energy across the planet. Subtle cyclical variations in forcing were greatly amplified by internal feedbacks in the Earth system, with processes in the polar regions influential for pole-to-equator temperature gradients and atmospheric carbon dioxide levels. Exploring the behaviour of the polar ice sheets and the Southern Ocean during this interval is crucial for understanding how the climate system operates and for constraining its sensitivity to future changes. Southern Ocean processes, including wind-driven upwelling, sea-ice formation, deep water production, and biological productivity, were instrumental in regulating Earth’s atmospheric carbon dioxide levels through Pleistocene glacial-interglacial cycles. On millennial timescales, rapid changes in ocean and atmospheric circulation were influenced by meltwater input from unstable ice sheet margins in both hemispheres, leading to highly variable regional and interhemispheric climate responses. This chapter provides an overview of the tools used in marine sediment and ice core archives to reconstruct Pleistocene changes in the Earth system. We discuss the mechanisms that controlled Earth’s climate over different timescales, and review the latest evidence that is revealing how the Antarctic Ice Sheet has both influenced and responded to Pleistocene climate change, including during intervals when Earth’s climate was similar to near-future projections. Despite experiencing ice volume changes that were modest in comparison to the advance and retreat of large Northern Hemisphere ice sheets, Antarctica has been a very active player in the ice sheet-ocean-climate system of the past 2.6 million years, and evidence increasingly suggests that it could respond dramatically to anthropogenic warming. |
author2 |
Florindo, F Siegert, M de Santis, L Naish, T |
format |
Book Part |
author |
Wilson, D van de Flierdt, T McKay, RM Naish, TR |
spellingShingle |
Wilson, D van de Flierdt, T McKay, RM Naish, TR Chapter 10 - Pleistocene Antarctic climate variability: ice sheet – ocean – climate interactions |
author_facet |
Wilson, D van de Flierdt, T McKay, RM Naish, TR |
author_sort |
Wilson, D |
title |
Chapter 10 - Pleistocene Antarctic climate variability: ice sheet – ocean – climate interactions |
title_short |
Chapter 10 - Pleistocene Antarctic climate variability: ice sheet – ocean – climate interactions |
title_full |
Chapter 10 - Pleistocene Antarctic climate variability: ice sheet – ocean – climate interactions |
title_fullStr |
Chapter 10 - Pleistocene Antarctic climate variability: ice sheet – ocean – climate interactions |
title_full_unstemmed |
Chapter 10 - Pleistocene Antarctic climate variability: ice sheet – ocean – climate interactions |
title_sort |
chapter 10 - pleistocene antarctic climate variability: ice sheet – ocean – climate interactions |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://discovery.ucl.ac.uk/id/eprint/10113851/7/Wilson%20et%20al%202021%20ACE2%20Pleistocene%20chapter%20final%20Feb%202021.pdf https://discovery.ucl.ac.uk/id/eprint/10113851/ |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet Sea ice Southern Ocean |
op_source |
In: Florindo, F and Siegert, M and de Santis, L and Naish, T, (eds.) Antarctic Climate Evolution. (pp. 465-529). Elsevier (2022) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10113851/7/Wilson%20et%20al%202021%20ACE2%20Pleistocene%20chapter%20final%20Feb%202021.pdf https://discovery.ucl.ac.uk/id/eprint/10113851/ |
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open |
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1786166095388868608 |