Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response
Abstract The interaction between ocean circulation and ice‐sheet dynamics plays a key role in the Quaternary climate. Compared with the surface and deep regions of the Atlantic Meridional Overturning Circulation (AMOC), the study of intermediate depths during key time periods, such as Heinrich Stadi...
Published in: | Journal of Quaternary Science |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2022
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/jqs.3444 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3444 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3444 |
id |
crwiley:10.1002/jqs.3444 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/jqs.3444 2024-06-02T08:08:13+00:00 Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response Depuydt, Pauline Mojtahid, Meryem Barras, Christine Bouhdayad, Fatima Zohra Toucanne, Samuel 2022 http://dx.doi.org/10.1002/jqs.3444 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3444 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3444 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 37, issue 7, page 1207-1221 ISSN 0267-8179 1099-1417 journal-article 2022 crwiley https://doi.org/10.1002/jqs.3444 2024-05-03T11:49:02Z Abstract The interaction between ocean circulation and ice‐sheet dynamics plays a key role in the Quaternary climate. Compared with the surface and deep regions of the Atlantic Meridional Overturning Circulation (AMOC), the study of intermediate depths during key time periods, such as Heinrich Stadials (HSs), remains poorly documented, especially for the northeast Atlantic. Here we use benthic foraminiferal assemblage data to trace palaeoenvironmental changes from ~32 to 14 ka cal bp at ~1000 m depth in the Bay of Biscay. Our results highlight the high sensitivity of foraminifera, with species‐specific responses, to continental (European Ice Sheet dynamics) and marine (AMOC) forcing factors during the last three HSs. In general, HSs were characterised by the concomitant presence of meso‐oligotrophic and anoxia indicator species and the low abundance of high‐energy indicator species. This confirms an overall sluggish intermediate circulation during the three HSs in the northeast Atlantic. HS1 is distinctive for its abundance of high‐organic flux indicator species during its early phase. This is consistent with the fact that HS1 was by far the most important period of ice‐sheet retreat and meltwater release into the ocean over the studied time interval. Finally, foraminifera depict the mid‐HS2 reventilation event due to regional glacier instabilities. Article in Journal/Newspaper Ice Sheet Northeast Atlantic Wiley Online Library Journal of Quaternary Science |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The interaction between ocean circulation and ice‐sheet dynamics plays a key role in the Quaternary climate. Compared with the surface and deep regions of the Atlantic Meridional Overturning Circulation (AMOC), the study of intermediate depths during key time periods, such as Heinrich Stadials (HSs), remains poorly documented, especially for the northeast Atlantic. Here we use benthic foraminiferal assemblage data to trace palaeoenvironmental changes from ~32 to 14 ka cal bp at ~1000 m depth in the Bay of Biscay. Our results highlight the high sensitivity of foraminifera, with species‐specific responses, to continental (European Ice Sheet dynamics) and marine (AMOC) forcing factors during the last three HSs. In general, HSs were characterised by the concomitant presence of meso‐oligotrophic and anoxia indicator species and the low abundance of high‐energy indicator species. This confirms an overall sluggish intermediate circulation during the three HSs in the northeast Atlantic. HS1 is distinctive for its abundance of high‐organic flux indicator species during its early phase. This is consistent with the fact that HS1 was by far the most important period of ice‐sheet retreat and meltwater release into the ocean over the studied time interval. Finally, foraminifera depict the mid‐HS2 reventilation event due to regional glacier instabilities. |
format |
Article in Journal/Newspaper |
author |
Depuydt, Pauline Mojtahid, Meryem Barras, Christine Bouhdayad, Fatima Zohra Toucanne, Samuel |
spellingShingle |
Depuydt, Pauline Mojtahid, Meryem Barras, Christine Bouhdayad, Fatima Zohra Toucanne, Samuel Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response |
author_facet |
Depuydt, Pauline Mojtahid, Meryem Barras, Christine Bouhdayad, Fatima Zohra Toucanne, Samuel |
author_sort |
Depuydt, Pauline |
title |
Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response |
title_short |
Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response |
title_full |
Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response |
title_fullStr |
Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response |
title_full_unstemmed |
Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response |
title_sort |
intermediate ocean circulation and cryosphere dynamics in the northeast atlantic during heinrich stadials: benthic foraminiferal assemblage response |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/jqs.3444 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3444 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3444 |
genre |
Ice Sheet Northeast Atlantic |
genre_facet |
Ice Sheet Northeast Atlantic |
op_source |
Journal of Quaternary Science volume 37, issue 7, page 1207-1221 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.3444 |
container_title |
Journal of Quaternary Science |
_version_ |
1800753415735738368 |