Oceanic forcing of the Marine Isotope Stage 11 interglacial.
The interglacial known as Marine Isotope Stage 11 has been proposed to be analogous to the Holocene, owing to similarities in the amplitudes of orbital forcing. It has been difficult to compare the periods, however, because of the long duration of Stage 11 and a lack of detailed knowledge of any ext...
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:8952 2023-05-15T16:41:01+02:00 Oceanic forcing of the Marine Isotope Stage 11 interglacial. Dickson, A.J. Beer, C.J. Demsey, C. Maslin, M. Bendle, J.A. McClymont, E.L. Pancost, R.D. 2009-06-01 http://dro.dur.ac.uk/8952/ https://doi.org/10.1038/NGEO527 unknown Nature Publishing Group dro:8952 issn:1752-0894 issn: 1752-0908 doi:10.1038/NGEO527 http://dro.dur.ac.uk/8952/ http://dx.doi.org/10.1038/NGEO527 Nature geoscience, 2009, Vol.2(6), pp.428-433 [Peer Reviewed Journal] Article PeerReviewed 2009 ftunivdurham https://doi.org/10.1038/NGEO527 2020-05-28T22:28:46Z The interglacial known as Marine Isotope Stage 11 has been proposed to be analogous to the Holocene, owing to similarities in the amplitudes of orbital forcing. It has been difficult to compare the periods, however, because of the long duration of Stage 11 and a lack of detailed knowledge of any extreme climate events that may have occurred. Here we use the distinctive phasing between seasurface temperatures and the oxygen-isotope records of benthic foraminifera in the southeast Atlantic Ocean to stratigraphically align the Holocene interglacial with the first half of the Marine Isotope Stage 11 interglacial optimum. This alignment suggests that the second half of Marine Isotope Stage 11 should not be used as a reference for 'pre-anthropogenic' greenhouse-gas emissions. By compiling benthic carbon-isotope records from sites in the Atlantic Ocean on a single timescale, we also find that meridional overturning circulation strengthened about 415,000 years ago, at a time of high orbital obliquity. We propose that this mechanism transported heat to the high northern latitudes, inhibiting significant ice-sheet build-up and prolonging interglacial conditions. We suggest that this mechanism may have also prolonged other interglacial periods throughout the past 800,000 years. Article in Journal/Newspaper Ice Sheet Durham University: Durham Research Online Nature Geoscience 2 6 428 433 |
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Durham University: Durham Research Online |
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The interglacial known as Marine Isotope Stage 11 has been proposed to be analogous to the Holocene, owing to similarities in the amplitudes of orbital forcing. It has been difficult to compare the periods, however, because of the long duration of Stage 11 and a lack of detailed knowledge of any extreme climate events that may have occurred. Here we use the distinctive phasing between seasurface temperatures and the oxygen-isotope records of benthic foraminifera in the southeast Atlantic Ocean to stratigraphically align the Holocene interglacial with the first half of the Marine Isotope Stage 11 interglacial optimum. This alignment suggests that the second half of Marine Isotope Stage 11 should not be used as a reference for 'pre-anthropogenic' greenhouse-gas emissions. By compiling benthic carbon-isotope records from sites in the Atlantic Ocean on a single timescale, we also find that meridional overturning circulation strengthened about 415,000 years ago, at a time of high orbital obliquity. We propose that this mechanism transported heat to the high northern latitudes, inhibiting significant ice-sheet build-up and prolonging interglacial conditions. We suggest that this mechanism may have also prolonged other interglacial periods throughout the past 800,000 years. |
format |
Article in Journal/Newspaper |
author |
Dickson, A.J. Beer, C.J. Demsey, C. Maslin, M. Bendle, J.A. McClymont, E.L. Pancost, R.D. |
spellingShingle |
Dickson, A.J. Beer, C.J. Demsey, C. Maslin, M. Bendle, J.A. McClymont, E.L. Pancost, R.D. Oceanic forcing of the Marine Isotope Stage 11 interglacial. |
author_facet |
Dickson, A.J. Beer, C.J. Demsey, C. Maslin, M. Bendle, J.A. McClymont, E.L. Pancost, R.D. |
author_sort |
Dickson, A.J. |
title |
Oceanic forcing of the Marine Isotope Stage 11 interglacial. |
title_short |
Oceanic forcing of the Marine Isotope Stage 11 interglacial. |
title_full |
Oceanic forcing of the Marine Isotope Stage 11 interglacial. |
title_fullStr |
Oceanic forcing of the Marine Isotope Stage 11 interglacial. |
title_full_unstemmed |
Oceanic forcing of the Marine Isotope Stage 11 interglacial. |
title_sort |
oceanic forcing of the marine isotope stage 11 interglacial. |
publisher |
Nature Publishing Group |
publishDate |
2009 |
url |
http://dro.dur.ac.uk/8952/ https://doi.org/10.1038/NGEO527 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Nature geoscience, 2009, Vol.2(6), pp.428-433 [Peer Reviewed Journal] |
op_relation |
dro:8952 issn:1752-0894 issn: 1752-0908 doi:10.1038/NGEO527 http://dro.dur.ac.uk/8952/ http://dx.doi.org/10.1038/NGEO527 |
op_doi |
https://doi.org/10.1038/NGEO527 |
container_title |
Nature Geoscience |
container_volume |
2 |
container_issue |
6 |
container_start_page |
428 |
op_container_end_page |
433 |
_version_ |
1766031448876253184 |