Geochemistry of sediments of stage 5 of the Nordic seas
Stable isotope, foraminifera and ice rafted detritus (IRD) records covering the last interglacial (the Eemian) from 7 sediment cores in a transect from the Norwegian to the Greenland Sea are presented. The percentages of Neogloboquadrina pachyderma (s.) and Globigerina quinqueloba, foraminiferal con...
Main Authors: | , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
1998
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.743287 https://doi.org/10.1594/PANGAEA.743287 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.743287 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.743287 2023-05-15T15:04:52+02:00 Geochemistry of sediments of stage 5 of the Nordic seas Fronval, Torben Jansen, Eystein Haflidason, Haflidi Sejrup, Hans Petter MEDIAN LATITUDE: 68.108683 * MEDIAN LONGITUDE: -6.803537 * SOUTH-BOUND LATITUDE: 66.678300 * WEST-BOUND LONGITUDE: -13.870667 * NORTH-BOUND LATITUDE: 69.483333 * EAST-BOUND LONGITUDE: 4.576700 * DATE/TIME START: 1971-01-01T00:00:00 * DATE/TIME END: 1985-08-09T10:15:00 1998-07-22 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.743287 https://doi.org/10.1594/PANGAEA.743287 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.743287 https://doi.org/10.1594/PANGAEA.743287 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Fronval, Torben; Jansen, Eystein; Haflidason, Haflidi; Sejrup, Hans Petter (1998): Variability in surface and deep water conditions in the nordic seas during the last interglacial period. Quaternary Science Reviews, 17(9-10), 963-985, https://doi.org/10.1016/S0277-3791(98)00038-9 104-644A 57-07 71-19 BC Box corer DRILL Drilling/drill rig GC Gravity corer Gravity corer (Kiel type) Håkon Mosby HM57 HM57-07 HM71 HM71-19/1 HM71-25 HM79 HM79-31 Joides Resolution Leg104 Norwegian Sea Ocean Drilling Program ODP SL Dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.743287 https://doi.org/10.1016/S0277-3791(98)00038-9 2023-01-20T07:31:51Z Stable isotope, foraminifera and ice rafted detritus (IRD) records covering the last interglacial (the Eemian) from 7 sediment cores in a transect from the Norwegian to the Greenland Sea are presented. The percentages of Neogloboquadrina pachyderma (s.) and Globigerina quinqueloba, foraminiferal content, and to some extent planktonic stable isotope records, demonstrate marked, regional changes in surface water conditions. Importantly, the variability in the abundances of subpolar foraminifera and foraminiferal content are not coherent, implying that these two types of proxies fluctuated independently of each other and most likely reflect changes in sea surface temperature and surface water carbonate productivity, respectively. Paleoceanographic reconstructions demonstrate significant movements of the oceanographic fronts. At the warmest periods, the Arctic front was located far west of the present-day location, at least within the Iceland Sea region. At 126-125 ka, this was most probably due to a stronger or more westerly located Norwegian current. Within the later warm intervals, higher heat flux to the western part of the basin reflects a combination of a stronger Irminger current and/or a weaker east Greenland current. During the main cold spell at ~124 ka, a diffuse Arctic front had a more southeasterly location than today, and intrusion of Atlantic surface waters was probably limited to a narrow corridor in the Eastern Norwegian Sea. A general correspondence between minima in sea surface temperatures and light benthic delta18O may indicate enhanced influx of freshwater to the basin within the cold events. At least in the Norwegian Sea, we find some evidence that the changes in surface water conditions are associated with changes in deep water ventilation. The majority of the fluctuations may be related to occasional breakdown or reduction of the thermohaline circulation within the Nordic seas. In the earliest Eemian, this could result from meltwater forcing. During the remaining part of the last ... Dataset Arctic East Greenland east greenland current Foraminifera* Greenland Greenland Sea Iceland Neogloboquadrina pachyderma Nordic Seas Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science Arctic Norwegian Sea Greenland ENVELOPE(-13.870667,4.576700,69.483333,66.678300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
104-644A 57-07 71-19 BC Box corer DRILL Drilling/drill rig GC Gravity corer Gravity corer (Kiel type) Håkon Mosby HM57 HM57-07 HM71 HM71-19/1 HM71-25 HM79 HM79-31 Joides Resolution Leg104 Norwegian Sea Ocean Drilling Program ODP SL |
spellingShingle |
104-644A 57-07 71-19 BC Box corer DRILL Drilling/drill rig GC Gravity corer Gravity corer (Kiel type) Håkon Mosby HM57 HM57-07 HM71 HM71-19/1 HM71-25 HM79 HM79-31 Joides Resolution Leg104 Norwegian Sea Ocean Drilling Program ODP SL Fronval, Torben Jansen, Eystein Haflidason, Haflidi Sejrup, Hans Petter Geochemistry of sediments of stage 5 of the Nordic seas |
topic_facet |
104-644A 57-07 71-19 BC Box corer DRILL Drilling/drill rig GC Gravity corer Gravity corer (Kiel type) Håkon Mosby HM57 HM57-07 HM71 HM71-19/1 HM71-25 HM79 HM79-31 Joides Resolution Leg104 Norwegian Sea Ocean Drilling Program ODP SL |
description |
Stable isotope, foraminifera and ice rafted detritus (IRD) records covering the last interglacial (the Eemian) from 7 sediment cores in a transect from the Norwegian to the Greenland Sea are presented. The percentages of Neogloboquadrina pachyderma (s.) and Globigerina quinqueloba, foraminiferal content, and to some extent planktonic stable isotope records, demonstrate marked, regional changes in surface water conditions. Importantly, the variability in the abundances of subpolar foraminifera and foraminiferal content are not coherent, implying that these two types of proxies fluctuated independently of each other and most likely reflect changes in sea surface temperature and surface water carbonate productivity, respectively. Paleoceanographic reconstructions demonstrate significant movements of the oceanographic fronts. At the warmest periods, the Arctic front was located far west of the present-day location, at least within the Iceland Sea region. At 126-125 ka, this was most probably due to a stronger or more westerly located Norwegian current. Within the later warm intervals, higher heat flux to the western part of the basin reflects a combination of a stronger Irminger current and/or a weaker east Greenland current. During the main cold spell at ~124 ka, a diffuse Arctic front had a more southeasterly location than today, and intrusion of Atlantic surface waters was probably limited to a narrow corridor in the Eastern Norwegian Sea. A general correspondence between minima in sea surface temperatures and light benthic delta18O may indicate enhanced influx of freshwater to the basin within the cold events. At least in the Norwegian Sea, we find some evidence that the changes in surface water conditions are associated with changes in deep water ventilation. The majority of the fluctuations may be related to occasional breakdown or reduction of the thermohaline circulation within the Nordic seas. In the earliest Eemian, this could result from meltwater forcing. During the remaining part of the last ... |
format |
Dataset |
author |
Fronval, Torben Jansen, Eystein Haflidason, Haflidi Sejrup, Hans Petter |
author_facet |
Fronval, Torben Jansen, Eystein Haflidason, Haflidi Sejrup, Hans Petter |
author_sort |
Fronval, Torben |
title |
Geochemistry of sediments of stage 5 of the Nordic seas |
title_short |
Geochemistry of sediments of stage 5 of the Nordic seas |
title_full |
Geochemistry of sediments of stage 5 of the Nordic seas |
title_fullStr |
Geochemistry of sediments of stage 5 of the Nordic seas |
title_full_unstemmed |
Geochemistry of sediments of stage 5 of the Nordic seas |
title_sort |
geochemistry of sediments of stage 5 of the nordic seas |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.743287 https://doi.org/10.1594/PANGAEA.743287 |
op_coverage |
MEDIAN LATITUDE: 68.108683 * MEDIAN LONGITUDE: -6.803537 * SOUTH-BOUND LATITUDE: 66.678300 * WEST-BOUND LONGITUDE: -13.870667 * NORTH-BOUND LATITUDE: 69.483333 * EAST-BOUND LONGITUDE: 4.576700 * DATE/TIME START: 1971-01-01T00:00:00 * DATE/TIME END: 1985-08-09T10:15:00 |
long_lat |
ENVELOPE(-13.870667,4.576700,69.483333,66.678300) |
geographic |
Arctic Norwegian Sea Greenland |
geographic_facet |
Arctic Norwegian Sea Greenland |
genre |
Arctic East Greenland east greenland current Foraminifera* Greenland Greenland Sea Iceland Neogloboquadrina pachyderma Nordic Seas Norwegian Sea |
genre_facet |
Arctic East Greenland east greenland current Foraminifera* Greenland Greenland Sea Iceland Neogloboquadrina pachyderma Nordic Seas Norwegian Sea |
op_source |
Supplement to: Fronval, Torben; Jansen, Eystein; Haflidason, Haflidi; Sejrup, Hans Petter (1998): Variability in surface and deep water conditions in the nordic seas during the last interglacial period. Quaternary Science Reviews, 17(9-10), 963-985, https://doi.org/10.1016/S0277-3791(98)00038-9 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.743287 https://doi.org/10.1594/PANGAEA.743287 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.743287 https://doi.org/10.1016/S0277-3791(98)00038-9 |
_version_ |
1766336604938436608 |