Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene
There is a converging body of evidence supporting a measurable slowdown of the Atlantic Meridional Overturning Circulation (AMOC) as climate warms and Northern Hemisphere ice sheets inexorably shrink. Within this context, we assess the variability of the AMOC during the Holocene based on a marine se...
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ftdatacite:10.23689/fidgeo-4452 2023-05-15T17:24:21+02:00 Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene Lippold, Jörg Pöppelmeier, Frerk Süfke, Finn Gutjahr, Marcus Goepfert, Tyler J. Blaser, Patrick Friedrich, Oliver Link, Jasmin M. Wacker, Lukas Rheinberger, Stefan Jaccard, Samuel L. 2019 https://dx.doi.org/10.23689/fidgeo-4452 https://e-docs.geo-leo.de/handle/11858/8798 en eng FID GEO Article article-journal Text ScholarlyArticle 2019 ftdatacite https://doi.org/10.23689/fidgeo-4452 2022-02-08T12:04:14Z There is a converging body of evidence supporting a measurable slowdown of the Atlantic Meridional Overturning Circulation (AMOC) as climate warms and Northern Hemisphere ice sheets inexorably shrink. Within this context, we assess the variability of the AMOC during the Holocene based on a marine sediment core retrieved from the deep northwest Atlantic, which sensitively recorded large-scale deglacial transitions in deep water circulation. While there is a diffuse notion of Holocene variability in Labrador and Nordic Seas overturning, we report a largely invariable deep water circulation for the last ~11,000 years, even during the meltwater pulse associated with the 8.2-ka event. Sensitivity tests along with high-resolution 231Pa/230Th data constrain the duration and the magnitude of possible Holocene AMOC variations. The generally constant baseline during the Holocene suggests attenuated natural variability of the large-scale AMOC on submillennial timescales and calls for compensating effects involving the upstream components of North Atlantic Deep Water. Text Nordic Seas North Atlantic Deep Water North Atlantic Northwest Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
description |
There is a converging body of evidence supporting a measurable slowdown of the Atlantic Meridional Overturning Circulation (AMOC) as climate warms and Northern Hemisphere ice sheets inexorably shrink. Within this context, we assess the variability of the AMOC during the Holocene based on a marine sediment core retrieved from the deep northwest Atlantic, which sensitively recorded large-scale deglacial transitions in deep water circulation. While there is a diffuse notion of Holocene variability in Labrador and Nordic Seas overturning, we report a largely invariable deep water circulation for the last ~11,000 years, even during the meltwater pulse associated with the 8.2-ka event. Sensitivity tests along with high-resolution 231Pa/230Th data constrain the duration and the magnitude of possible Holocene AMOC variations. The generally constant baseline during the Holocene suggests attenuated natural variability of the large-scale AMOC on submillennial timescales and calls for compensating effects involving the upstream components of North Atlantic Deep Water. |
format |
Text |
author |
Lippold, Jörg Pöppelmeier, Frerk Süfke, Finn Gutjahr, Marcus Goepfert, Tyler J. Blaser, Patrick Friedrich, Oliver Link, Jasmin M. Wacker, Lukas Rheinberger, Stefan Jaccard, Samuel L. |
spellingShingle |
Lippold, Jörg Pöppelmeier, Frerk Süfke, Finn Gutjahr, Marcus Goepfert, Tyler J. Blaser, Patrick Friedrich, Oliver Link, Jasmin M. Wacker, Lukas Rheinberger, Stefan Jaccard, Samuel L. Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene |
author_facet |
Lippold, Jörg Pöppelmeier, Frerk Süfke, Finn Gutjahr, Marcus Goepfert, Tyler J. Blaser, Patrick Friedrich, Oliver Link, Jasmin M. Wacker, Lukas Rheinberger, Stefan Jaccard, Samuel L. |
author_sort |
Lippold, Jörg |
title |
Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene |
title_short |
Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene |
title_full |
Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene |
title_fullStr |
Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene |
title_full_unstemmed |
Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene |
title_sort |
constraining the variability of the atlantic meridional overturning circulation during the holocene |
publisher |
FID GEO |
publishDate |
2019 |
url |
https://dx.doi.org/10.23689/fidgeo-4452 https://e-docs.geo-leo.de/handle/11858/8798 |
genre |
Nordic Seas North Atlantic Deep Water North Atlantic Northwest Atlantic |
genre_facet |
Nordic Seas North Atlantic Deep Water North Atlantic Northwest Atlantic |
op_doi |
https://doi.org/10.23689/fidgeo-4452 |
_version_ |
1766115321390825472 |