Low-frequency Pliocene climate variability in the eastern Nordic Seas.
The Pliocene (5.3–2.6 Ma) is often described as a relatively stable climatic period, with warm temperatures characterizing high latitudes. New suborbital resolved stable isotope records from ODP Hole 642B in the Eastern Nordic Seas document that the Pliocene was not a stable period characterized by...
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American Geophysical Union
2016
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:19691 2023-05-15T15:08:31+02:00 Low-frequency Pliocene climate variability in the eastern Nordic Seas. Risebrobakken, B. Andersson, C. De Schepper, S. McClymont, E.L. 2016-09-17 application/pdf http://dro.dur.ac.uk/19691/ http://dro.dur.ac.uk/19691/1/19691.pdf http://dro.dur.ac.uk/19691/2/19691.pdf http://dro.dur.ac.uk/19691/3/19691P.pdf https://doi.org/10.1002/2015PA002918 unknown American Geophysical Union dro:19691 issn:0883-8305 issn: 1944-9186 doi:10.1002/2015PA002918 http://dro.dur.ac.uk/19691/ http://dx.doi.org/10.1002/2015PA002918 http://dro.dur.ac.uk/19691/1/19691.pdf http://dro.dur.ac.uk/19691/2/19691.pdf http://dro.dur.ac.uk/19691/3/19691P.pdf Risebrobakken, B., C. Andersson, S. De Schepper, and E. L. McClymont (2016), Low-frequency Pliocene climate variability in the eastern Nordic Seas, Paleoceanography, 31(9): 1154-1175, doi:10.1002/2015PA002918. To view the published open abstract, go to http://dx.doi.org and enter the DOI. Paleoceanography, 2016, Vol.31(9), pp.1154-1175 [Peer Reviewed Journal] Article PeerReviewed 2016 ftunivdurham https://doi.org/10.1002/2015PA002918 2020-06-11T22:23:40Z The Pliocene (5.3–2.6 Ma) is often described as a relatively stable climatic period, with warm temperatures characterizing high latitudes. New suborbital resolved stable isotope records from ODP Hole 642B in the Eastern Nordic Seas document that the Pliocene was not a stable period characterized by one climate. Rather, seven distinct climate phases, each lasting between 150,000 and 400,000 years, are identified and characterized in the time interval 5.1–3.1 Ma. Four of the transitions between the defined climate phases occurred close to an eccentricity minimum and a minimum in amplitude of change for Northern Hemisphere summer insolation, while two occurred around an eccentricity maximum and a maximum in amplitude in insolation change. Hence, a low frequency response of the Nordic Seas to insolation forcing is indicated. In addition, paleogeographic and related paleoceanographic changes, expansion of the Arctic sea ice cover and onset of NHG were important factors behind the evolving Pliocene low frequency variability in the eastern Nordic Seas. It is likely that the identified climate phases and transitions are important beyond the Nordic Seas, due to their association with changes to both insolation and paleogeography. Also, a strong and variable degree of diagenetic calcite overgrowth is documented for the planktic foraminifera, especially influencing the planktic δ18O results; the absolute values and amplitude of change cannot be taken at face value. Article in Journal/Newspaper Arctic Foraminifera* Nordic Seas Sea ice Durham University: Durham Research Online Arctic Paleoceanography 31 9 1154 1175 |
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Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
description |
The Pliocene (5.3–2.6 Ma) is often described as a relatively stable climatic period, with warm temperatures characterizing high latitudes. New suborbital resolved stable isotope records from ODP Hole 642B in the Eastern Nordic Seas document that the Pliocene was not a stable period characterized by one climate. Rather, seven distinct climate phases, each lasting between 150,000 and 400,000 years, are identified and characterized in the time interval 5.1–3.1 Ma. Four of the transitions between the defined climate phases occurred close to an eccentricity minimum and a minimum in amplitude of change for Northern Hemisphere summer insolation, while two occurred around an eccentricity maximum and a maximum in amplitude in insolation change. Hence, a low frequency response of the Nordic Seas to insolation forcing is indicated. In addition, paleogeographic and related paleoceanographic changes, expansion of the Arctic sea ice cover and onset of NHG were important factors behind the evolving Pliocene low frequency variability in the eastern Nordic Seas. It is likely that the identified climate phases and transitions are important beyond the Nordic Seas, due to their association with changes to both insolation and paleogeography. Also, a strong and variable degree of diagenetic calcite overgrowth is documented for the planktic foraminifera, especially influencing the planktic δ18O results; the absolute values and amplitude of change cannot be taken at face value. |
format |
Article in Journal/Newspaper |
author |
Risebrobakken, B. Andersson, C. De Schepper, S. McClymont, E.L. |
spellingShingle |
Risebrobakken, B. Andersson, C. De Schepper, S. McClymont, E.L. Low-frequency Pliocene climate variability in the eastern Nordic Seas. |
author_facet |
Risebrobakken, B. Andersson, C. De Schepper, S. McClymont, E.L. |
author_sort |
Risebrobakken, B. |
title |
Low-frequency Pliocene climate variability in the eastern Nordic Seas. |
title_short |
Low-frequency Pliocene climate variability in the eastern Nordic Seas. |
title_full |
Low-frequency Pliocene climate variability in the eastern Nordic Seas. |
title_fullStr |
Low-frequency Pliocene climate variability in the eastern Nordic Seas. |
title_full_unstemmed |
Low-frequency Pliocene climate variability in the eastern Nordic Seas. |
title_sort |
low-frequency pliocene climate variability in the eastern nordic seas. |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
http://dro.dur.ac.uk/19691/ http://dro.dur.ac.uk/19691/1/19691.pdf http://dro.dur.ac.uk/19691/2/19691.pdf http://dro.dur.ac.uk/19691/3/19691P.pdf https://doi.org/10.1002/2015PA002918 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Foraminifera* Nordic Seas Sea ice |
genre_facet |
Arctic Foraminifera* Nordic Seas Sea ice |
op_source |
Paleoceanography, 2016, Vol.31(9), pp.1154-1175 [Peer Reviewed Journal] |
op_relation |
dro:19691 issn:0883-8305 issn: 1944-9186 doi:10.1002/2015PA002918 http://dro.dur.ac.uk/19691/ http://dx.doi.org/10.1002/2015PA002918 http://dro.dur.ac.uk/19691/1/19691.pdf http://dro.dur.ac.uk/19691/2/19691.pdf http://dro.dur.ac.uk/19691/3/19691P.pdf |
op_rights |
Risebrobakken, B., C. Andersson, S. De Schepper, and E. L. McClymont (2016), Low-frequency Pliocene climate variability in the eastern Nordic Seas, Paleoceanography, 31(9): 1154-1175, doi:10.1002/2015PA002918. To view the published open abstract, go to http://dx.doi.org and enter the DOI. |
op_doi |
https://doi.org/10.1002/2015PA002918 |
container_title |
Paleoceanography |
container_volume |
31 |
container_issue |
9 |
container_start_page |
1154 |
op_container_end_page |
1175 |
_version_ |
1766339864713756672 |