Paleoceanographic changes in the Disko Bugt area, West Greenland, during the Holocene
Micropaleontological analyses of a sediment core raised in Disko Bugt (West of Greenland) were undertaken in order to document paleoceanographical changes in the eastern Baffin Bay during the Holocene. The modern analogue technique (MAT) applied to dinocyst assemblages provided information on paleo-...
Published in: | The Holocene |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2014
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1177/0959683614544060 https://journals.sagepub.com/doi/pdf/10.1177/0959683614544060 https://journals.sagepub.com/doi/full-xml/10.1177/0959683614544060 |
id |
crsagepubl:10.1177/0959683614544060 |
---|---|
record_format |
openpolar |
spelling |
crsagepubl:10.1177/0959683614544060 2024-10-13T14:06:11+00:00 Paleoceanographic changes in the Disko Bugt area, West Greenland, during the Holocene Ouellet-Bernier, Marie-Michèle de Vernal, Anne Hillaire-Marcel, Claude Moros, Matthias 2014 http://dx.doi.org/10.1177/0959683614544060 https://journals.sagepub.com/doi/pdf/10.1177/0959683614544060 https://journals.sagepub.com/doi/full-xml/10.1177/0959683614544060 en eng SAGE Publications https://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 24, issue 11, page 1573-1583 ISSN 0959-6836 1477-0911 journal-article 2014 crsagepubl https://doi.org/10.1177/0959683614544060 2024-09-24T04:11:27Z Micropaleontological analyses of a sediment core raised in Disko Bugt (West of Greenland) were undertaken in order to document paleoceanographical changes in the eastern Baffin Bay during the Holocene. The modern analogue technique (MAT) applied to dinocyst assemblages provided information on paleo-sea-surface conditions, whereas isotopic analyses of benthic foraminifers aimed at documenting the ‘deep’ water mass occupying the site. During the earlier interval recorded (~10 to ~7.3 cal. kyr BP), important discharge of ice and meltwater from the Greenland Ice Sheet (GIS) margin, notably through the Jakobshavn Isbrae, resulted in harsh conditions with a dense sea-ice cover and low temperatures, productivity, and foraminiferal abundances. Postglacial conditions settled at ~7.3 cal. kyr BP, with a sharp rise in dinocyst abundance and species diversity, which led to reconstruct increase in summer temperatures. We link this transition to the advection of West Greenland Current waters in the upper part of the water column after the reduction of meltwater inputs from GIS. Optimal temperature conditions reaching up to >10°C were finally achieved in surface waters at ~6 cal. kyr BP. Slight cooling pulses were then recorded at ~4.2–4 and ~1.5–1 cal. kyr BP, and the final optimum recorded in surface temperature from ~1 to 0.8 cal. kyr BP is associated with the ‘Medieval Warm Period’. Throughout the postglacial interval, the data suggest an opposition between sea-surface temperatures and salinity, with warmer intervals being characterized by lower salinity waters, probably as a result of the higher freshwater discharge along the ice margin and notably the Jakobshavn Isbrae. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Disko bugt Greenland Ice Sheet Jakobshavn Sea ice SAGE Publications Baffin Bay Greenland The Holocene 24 11 1573 1583 |
institution |
Open Polar |
collection |
SAGE Publications |
op_collection_id |
crsagepubl |
language |
English |
description |
Micropaleontological analyses of a sediment core raised in Disko Bugt (West of Greenland) were undertaken in order to document paleoceanographical changes in the eastern Baffin Bay during the Holocene. The modern analogue technique (MAT) applied to dinocyst assemblages provided information on paleo-sea-surface conditions, whereas isotopic analyses of benthic foraminifers aimed at documenting the ‘deep’ water mass occupying the site. During the earlier interval recorded (~10 to ~7.3 cal. kyr BP), important discharge of ice and meltwater from the Greenland Ice Sheet (GIS) margin, notably through the Jakobshavn Isbrae, resulted in harsh conditions with a dense sea-ice cover and low temperatures, productivity, and foraminiferal abundances. Postglacial conditions settled at ~7.3 cal. kyr BP, with a sharp rise in dinocyst abundance and species diversity, which led to reconstruct increase in summer temperatures. We link this transition to the advection of West Greenland Current waters in the upper part of the water column after the reduction of meltwater inputs from GIS. Optimal temperature conditions reaching up to >10°C were finally achieved in surface waters at ~6 cal. kyr BP. Slight cooling pulses were then recorded at ~4.2–4 and ~1.5–1 cal. kyr BP, and the final optimum recorded in surface temperature from ~1 to 0.8 cal. kyr BP is associated with the ‘Medieval Warm Period’. Throughout the postglacial interval, the data suggest an opposition between sea-surface temperatures and salinity, with warmer intervals being characterized by lower salinity waters, probably as a result of the higher freshwater discharge along the ice margin and notably the Jakobshavn Isbrae. |
format |
Article in Journal/Newspaper |
author |
Ouellet-Bernier, Marie-Michèle de Vernal, Anne Hillaire-Marcel, Claude Moros, Matthias |
spellingShingle |
Ouellet-Bernier, Marie-Michèle de Vernal, Anne Hillaire-Marcel, Claude Moros, Matthias Paleoceanographic changes in the Disko Bugt area, West Greenland, during the Holocene |
author_facet |
Ouellet-Bernier, Marie-Michèle de Vernal, Anne Hillaire-Marcel, Claude Moros, Matthias |
author_sort |
Ouellet-Bernier, Marie-Michèle |
title |
Paleoceanographic changes in the Disko Bugt area, West Greenland, during the Holocene |
title_short |
Paleoceanographic changes in the Disko Bugt area, West Greenland, during the Holocene |
title_full |
Paleoceanographic changes in the Disko Bugt area, West Greenland, during the Holocene |
title_fullStr |
Paleoceanographic changes in the Disko Bugt area, West Greenland, during the Holocene |
title_full_unstemmed |
Paleoceanographic changes in the Disko Bugt area, West Greenland, during the Holocene |
title_sort |
paleoceanographic changes in the disko bugt area, west greenland, during the holocene |
publisher |
SAGE Publications |
publishDate |
2014 |
url |
http://dx.doi.org/10.1177/0959683614544060 https://journals.sagepub.com/doi/pdf/10.1177/0959683614544060 https://journals.sagepub.com/doi/full-xml/10.1177/0959683614544060 |
geographic |
Baffin Bay Greenland |
geographic_facet |
Baffin Bay Greenland |
genre |
Baffin Bay Baffin Bay Baffin Disko bugt Greenland Ice Sheet Jakobshavn Sea ice |
genre_facet |
Baffin Bay Baffin Bay Baffin Disko bugt Greenland Ice Sheet Jakobshavn Sea ice |
op_source |
The Holocene volume 24, issue 11, page 1573-1583 ISSN 0959-6836 1477-0911 |
op_rights |
https://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683614544060 |
container_title |
The Holocene |
container_volume |
24 |
container_issue |
11 |
container_start_page |
1573 |
op_container_end_page |
1583 |
_version_ |
1812812246859907072 |