Patterns of millennial variability over the last 500 ka
Millennial variability is a robust feature of many paleoclimate records, at least throughout the last several glacial cycles. Here we use the mean signal from Antarctic climate events 1 to 4 to probe the EPICA Dome C temperature proxy reconstruction through the last 500 ka for similar millennial-sca...
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ftdoajarticles:oai:doaj.org/article:e8a0406b7ba74cadb406fcb35ba0b45e 2023-05-15T14:01:12+02:00 Patterns of millennial variability over the last 500 ka M. Siddall E. J. Rohling T. Blunier R. Spahni 2010-05-01T00:00:00Z https://doi.org/10.5194/cp-6-295-2010 https://doaj.org/article/e8a0406b7ba74cadb406fcb35ba0b45e EN eng Copernicus Publications http://www.clim-past.net/6/295/2010/cp-6-295-2010.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-6-295-2010 1814-9324 1814-9332 https://doaj.org/article/e8a0406b7ba74cadb406fcb35ba0b45e Climate of the Past, Vol 6, Iss 3, Pp 295-303 (2010) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2010 ftdoajarticles https://doi.org/10.5194/cp-6-295-2010 2022-12-31T01:37:27Z Millennial variability is a robust feature of many paleoclimate records, at least throughout the last several glacial cycles. Here we use the mean signal from Antarctic climate events 1 to 4 to probe the EPICA Dome C temperature proxy reconstruction through the last 500 ka for similar millennial-scale events. We find that clusters of millennial events occurred in a regular fashion over half of the time during this with a mean recurrence interval of 21 kyr. We find that there is no consistent link between ice-rafted debris deposition and millennial variability. Instead we speculate that changes in the zonality of atmospheric circulation over the North Atlantic form a viable alternative to freshwater release from icebergs as a trigger for millennial variability. We suggest that millennial changes in the zonality of atmospheric circulation over the North Atlantic are linked to precession via sea-ice feedbacks and that this relationship is modified by the presence of the large, Northern Hemisphere ice sheets during glacial periods. Article in Journal/Newspaper Antarc* Antarctic EPICA Iceberg* North Atlantic Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Climate of the Past 6 3 295 303 |
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 M. Siddall E. J. Rohling T. Blunier R. Spahni Patterns of millennial variability over the last 500 ka |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Millennial variability is a robust feature of many paleoclimate records, at least throughout the last several glacial cycles. Here we use the mean signal from Antarctic climate events 1 to 4 to probe the EPICA Dome C temperature proxy reconstruction through the last 500 ka for similar millennial-scale events. We find that clusters of millennial events occurred in a regular fashion over half of the time during this with a mean recurrence interval of 21 kyr. We find that there is no consistent link between ice-rafted debris deposition and millennial variability. Instead we speculate that changes in the zonality of atmospheric circulation over the North Atlantic form a viable alternative to freshwater release from icebergs as a trigger for millennial variability. We suggest that millennial changes in the zonality of atmospheric circulation over the North Atlantic are linked to precession via sea-ice feedbacks and that this relationship is modified by the presence of the large, Northern Hemisphere ice sheets during glacial periods. |
format |
Article in Journal/Newspaper |
author |
M. Siddall E. J. Rohling T. Blunier R. Spahni |
author_facet |
M. Siddall E. J. Rohling T. Blunier R. Spahni |
author_sort |
M. Siddall |
title |
Patterns of millennial variability over the last 500 ka |
title_short |
Patterns of millennial variability over the last 500 ka |
title_full |
Patterns of millennial variability over the last 500 ka |
title_fullStr |
Patterns of millennial variability over the last 500 ka |
title_full_unstemmed |
Patterns of millennial variability over the last 500 ka |
title_sort |
patterns of millennial variability over the last 500 ka |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/cp-6-295-2010 https://doaj.org/article/e8a0406b7ba74cadb406fcb35ba0b45e |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic EPICA Iceberg* North Atlantic Sea ice |
genre_facet |
Antarc* Antarctic EPICA Iceberg* North Atlantic Sea ice |
op_source |
Climate of the Past, Vol 6, Iss 3, Pp 295-303 (2010) |
op_relation |
http://www.clim-past.net/6/295/2010/cp-6-295-2010.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-6-295-2010 1814-9324 1814-9332 https://doaj.org/article/e8a0406b7ba74cadb406fcb35ba0b45e |
op_doi |
https://doi.org/10.5194/cp-6-295-2010 |
container_title |
Climate of the Past |
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6 |
container_issue |
3 |
container_start_page |
295 |
op_container_end_page |
303 |
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1766270798732984320 |