Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years
To reconstruct the climatic and paleoceanographic variability offshore Northeast Greenland during the last ~10 ka with multidecadal resolution, sediment core PS93/025 from the outermost North-East Greenland continental shelf (80.5°N) was studied by a variety of micropaleontological, sedimentological...
Published in: | The Holocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://oceanrep.geomar.de/id/eprint/50364/ https://oceanrep.geomar.de/id/eprint/50364/1/Zehnich_manuscript.pdf https://doi.org/10.1177/0959683620950393 |
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ftoceanrep:oai:oceanrep.geomar.de:50364 2023-05-15T16:03:54+02:00 Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years Zehnich, Marc Spielhagen, Robert F. Bauch, Henning A. Forwick, Matthias Hass, H. Christian Palme, Tina Stein, Ruediger Syring, Nicole 2020-12-01 text https://oceanrep.geomar.de/id/eprint/50364/ https://oceanrep.geomar.de/id/eprint/50364/1/Zehnich_manuscript.pdf https://doi.org/10.1177/0959683620950393 en eng SAGE https://oceanrep.geomar.de/id/eprint/50364/1/Zehnich_manuscript.pdf Zehnich, M., Spielhagen, R. F., Bauch, H. A. , Forwick, M., Hass, H. C., Palme, T., Stein, R. and Syring, N. (2020) Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years. Open Access The Holocene, 30 (12). pp. 1752-1766. DOI 10.1177/0959683620950393 <https://doi.org/10.1177/0959683620950393>. doi:10.1177/0959683620950393 info:eu-repo/semantics/openAccess Article PeerReviewed 2020 ftoceanrep https://doi.org/10.1177/0959683620950393 2023-04-07T15:51:29Z To reconstruct the climatic and paleoceanographic variability offshore Northeast Greenland during the last ~10 ka with multidecadal resolution, sediment core PS93/025 from the outermost North-East Greenland continental shelf (80.5°N) was studied by a variety of micropaleontological, sedimentological and isotopic methods. High foraminiferal fluxes, together with high proportions of ice-rafted debris and high Ca/Fe ratios, indicate a maximum in bioproductivity until ~8 ka related to a low sea-ice coverage. Sortable silt values, planktic foraminifer associations, and stable isotope data of planktic and benthic foraminifers suggest a strong westward advection of relatively warm Atlantic Water by the Return Atlantic Current during this time, with a noticeable bottom current activity. This advection may have been facilitated by a greater water depth at our site, resulting from postglacial isostatic depression. For the following mid-Holocene interval (ca. 8–5 ka), isotope data, lower foraminiferal fluxes and a shift in grain size maxima point to a lasting but successively decreasing Atlantic Water inflow, a weakening productivity, and a growing sea-ice coverage which is also revealed by the P III IP 25 index. A final stage in the environmental development was reached at ~5 ka with the establishment of pre-industrial conditions. Low Ca/Fe ratios, low foraminiferal fluxes, low sortable silt values and the sea-ice indicating P III IP 25 index point to a limited productivity and a weak Atlantic Water inflow by the Return Atlantic Current to our research area, as well as a higher and/or seasonally more extended sea-ice coverage during the Late Holocene. Two intervals with somewhat enhanced Atlantic Water advection around 2.0 and 1.0 ka are indicated by slightly increased foraminiferal fluxes and the reoccurrence of subpolar foraminifers. These intervals may correlate with the Roman Warm Period and the Medieval Climate Anomaly, as defined in the North Atlantic region. Article in Journal/Newspaper East Greenland Fram Strait Greenland North Atlantic Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Greenland Index Point ENVELOPE(167.917,167.917,-73.350,-73.350) The Holocene 30 12 1752 1766 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
To reconstruct the climatic and paleoceanographic variability offshore Northeast Greenland during the last ~10 ka with multidecadal resolution, sediment core PS93/025 from the outermost North-East Greenland continental shelf (80.5°N) was studied by a variety of micropaleontological, sedimentological and isotopic methods. High foraminiferal fluxes, together with high proportions of ice-rafted debris and high Ca/Fe ratios, indicate a maximum in bioproductivity until ~8 ka related to a low sea-ice coverage. Sortable silt values, planktic foraminifer associations, and stable isotope data of planktic and benthic foraminifers suggest a strong westward advection of relatively warm Atlantic Water by the Return Atlantic Current during this time, with a noticeable bottom current activity. This advection may have been facilitated by a greater water depth at our site, resulting from postglacial isostatic depression. For the following mid-Holocene interval (ca. 8–5 ka), isotope data, lower foraminiferal fluxes and a shift in grain size maxima point to a lasting but successively decreasing Atlantic Water inflow, a weakening productivity, and a growing sea-ice coverage which is also revealed by the P III IP 25 index. A final stage in the environmental development was reached at ~5 ka with the establishment of pre-industrial conditions. Low Ca/Fe ratios, low foraminiferal fluxes, low sortable silt values and the sea-ice indicating P III IP 25 index point to a limited productivity and a weak Atlantic Water inflow by the Return Atlantic Current to our research area, as well as a higher and/or seasonally more extended sea-ice coverage during the Late Holocene. Two intervals with somewhat enhanced Atlantic Water advection around 2.0 and 1.0 ka are indicated by slightly increased foraminiferal fluxes and the reoccurrence of subpolar foraminifers. These intervals may correlate with the Roman Warm Period and the Medieval Climate Anomaly, as defined in the North Atlantic region. |
format |
Article in Journal/Newspaper |
author |
Zehnich, Marc Spielhagen, Robert F. Bauch, Henning A. Forwick, Matthias Hass, H. Christian Palme, Tina Stein, Ruediger Syring, Nicole |
spellingShingle |
Zehnich, Marc Spielhagen, Robert F. Bauch, Henning A. Forwick, Matthias Hass, H. Christian Palme, Tina Stein, Ruediger Syring, Nicole Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years |
author_facet |
Zehnich, Marc Spielhagen, Robert F. Bauch, Henning A. Forwick, Matthias Hass, H. Christian Palme, Tina Stein, Ruediger Syring, Nicole |
author_sort |
Zehnich, Marc |
title |
Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years |
title_short |
Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years |
title_full |
Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years |
title_fullStr |
Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years |
title_full_unstemmed |
Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years |
title_sort |
environmental variability off ne greenland (western fram strait) during the past 10,600 years |
publisher |
SAGE |
publishDate |
2020 |
url |
https://oceanrep.geomar.de/id/eprint/50364/ https://oceanrep.geomar.de/id/eprint/50364/1/Zehnich_manuscript.pdf https://doi.org/10.1177/0959683620950393 |
long_lat |
ENVELOPE(167.917,167.917,-73.350,-73.350) |
geographic |
Greenland Index Point |
geographic_facet |
Greenland Index Point |
genre |
East Greenland Fram Strait Greenland North Atlantic Sea ice |
genre_facet |
East Greenland Fram Strait Greenland North Atlantic Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/50364/1/Zehnich_manuscript.pdf Zehnich, M., Spielhagen, R. F., Bauch, H. A. , Forwick, M., Hass, H. C., Palme, T., Stein, R. and Syring, N. (2020) Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years. Open Access The Holocene, 30 (12). pp. 1752-1766. DOI 10.1177/0959683620950393 <https://doi.org/10.1177/0959683620950393>. doi:10.1177/0959683620950393 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1177/0959683620950393 |
container_title |
The Holocene |
container_volume |
30 |
container_issue |
12 |
container_start_page |
1752 |
op_container_end_page |
1766 |
_version_ |
1766399597515636736 |