Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer
Planktic foraminifers Neogloboquadrina pachyderma (sin.) from 87 eastern and central Arctic Ocean surface sediment samples were analyzed for stable oxygen and carbon isotope composition. Additional results from 52 stations were taken from the literature. The lateral distribution of δ18O (Full-size i...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
1994
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Online Access: | https://oceanrep.geomar.de/id/eprint/31813/ https://oceanrep.geomar.de/id/eprint/31813/1/Spielhagen_Marine%20Geology.de.pdf https://doi.org/10.1016/0025-3227(94)90183-X |
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ftoceanrep:oai:oceanrep.geomar.de:31813 2023-05-15T14:27:03+02:00 Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer Spielhagen, Robert F. Erlenkeuser, Helmut 1994 text https://oceanrep.geomar.de/id/eprint/31813/ https://oceanrep.geomar.de/id/eprint/31813/1/Spielhagen_Marine%20Geology.de.pdf https://doi.org/10.1016/0025-3227(94)90183-X en eng Elsevier https://oceanrep.geomar.de/id/eprint/31813/1/Spielhagen_Marine%20Geology.de.pdf Spielhagen, R. F. and Erlenkeuser, H. (1994) Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer. Marine Geology, 119 (3-4). pp. 227-250. DOI 10.1016/0025-3227(94)90183-X <https://doi.org/10.1016/0025-3227%2894%2990183-X>. doi:10.1016/0025-3227(94)90183-X info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1994 ftoceanrep https://doi.org/10.1016/0025-3227(94)90183-X 2023-04-07T15:24:21Z Planktic foraminifers Neogloboquadrina pachyderma (sin.) from 87 eastern and central Arctic Ocean surface sediment samples were analyzed for stable oxygen and carbon isotope composition. Additional results from 52 stations were taken from the literature. The lateral distribution of δ18O (Full-size image (<1 K)) values in the Arctic Ocean reveals a pattern of roughly parallel, W-E stretching zones in the Eurasian Basin, each ∼0.5‰ wide on the δ18O scale. The low horizontal and vertical temperature variability in the Arctic halocline waters (0–100 m) suggests only little influence of temperature on the oxygen isotope distribution of N. pachyderma (sin.). The zone of maximum δ18O values of up to 3.8‰ is situated in the southern Nansen Basin and relates to the tongue of saline (> 33%.) Atlantic waters entering the Arctic Ocean through the Fram Strait. δ18O values decrease both to the Barents Shelf and to the North Pole, in accordance with the decreasing salinities of the halocline waters. In the Nansen Basin, a strong N-S δ18O gradient is in contrast with a relatively low salinity change and suggests contributions from different freshwater sources, i.e. salinity reduction from sea ice meltwater in the south and from light isotope waters (meteoric precipitation and river-runoff) in the northern part of the basin. North of the Gakkel Ridge, δ18O and salinity gradients are in good accordance and suggest less influence of sea ice melting processes. The δ13C (Full-size image (<1 K)) values of N. pachyderma (sin.) from Arctic Ocean surface sediment samples are generally high (0.75–0.95‰). Lower values in the southern Eurasian Basin appear to be related to the intrusion of Atlantic waters. The high δ13C values are evidence for well ventilated surface waters. Because the perennial Arctic sea ice cover largely prevents atmosphere-ocean gas exchange, ventilation on the seasonally open shelves must be of major importance. Lack of δ13C gradients along the main routes of the ice drift from the Siberian shelves to the ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean Fram Strait Nansen Basin Neogloboquadrina pachyderma North Pole Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) North Pole Marine Geology 119 3-4 227 250 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Planktic foraminifers Neogloboquadrina pachyderma (sin.) from 87 eastern and central Arctic Ocean surface sediment samples were analyzed for stable oxygen and carbon isotope composition. Additional results from 52 stations were taken from the literature. The lateral distribution of δ18O (Full-size image (<1 K)) values in the Arctic Ocean reveals a pattern of roughly parallel, W-E stretching zones in the Eurasian Basin, each ∼0.5‰ wide on the δ18O scale. The low horizontal and vertical temperature variability in the Arctic halocline waters (0–100 m) suggests only little influence of temperature on the oxygen isotope distribution of N. pachyderma (sin.). The zone of maximum δ18O values of up to 3.8‰ is situated in the southern Nansen Basin and relates to the tongue of saline (> 33%.) Atlantic waters entering the Arctic Ocean through the Fram Strait. δ18O values decrease both to the Barents Shelf and to the North Pole, in accordance with the decreasing salinities of the halocline waters. In the Nansen Basin, a strong N-S δ18O gradient is in contrast with a relatively low salinity change and suggests contributions from different freshwater sources, i.e. salinity reduction from sea ice meltwater in the south and from light isotope waters (meteoric precipitation and river-runoff) in the northern part of the basin. North of the Gakkel Ridge, δ18O and salinity gradients are in good accordance and suggest less influence of sea ice melting processes. The δ13C (Full-size image (<1 K)) values of N. pachyderma (sin.) from Arctic Ocean surface sediment samples are generally high (0.75–0.95‰). Lower values in the southern Eurasian Basin appear to be related to the intrusion of Atlantic waters. The high δ13C values are evidence for well ventilated surface waters. Because the perennial Arctic sea ice cover largely prevents atmosphere-ocean gas exchange, ventilation on the seasonally open shelves must be of major importance. Lack of δ13C gradients along the main routes of the ice drift from the Siberian shelves to the ... |
format |
Article in Journal/Newspaper |
author |
Spielhagen, Robert F. Erlenkeuser, Helmut |
spellingShingle |
Spielhagen, Robert F. Erlenkeuser, Helmut Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer |
author_facet |
Spielhagen, Robert F. Erlenkeuser, Helmut |
author_sort |
Spielhagen, Robert F. |
title |
Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer |
title_short |
Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer |
title_full |
Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer |
title_fullStr |
Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer |
title_full_unstemmed |
Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer |
title_sort |
stable oxygen and carbon isotopes in planktic foraminifers from arctic ocean surface sediments: reflection of the low salinity surface water layer |
publisher |
Elsevier |
publishDate |
1994 |
url |
https://oceanrep.geomar.de/id/eprint/31813/ https://oceanrep.geomar.de/id/eprint/31813/1/Spielhagen_Marine%20Geology.de.pdf https://doi.org/10.1016/0025-3227(94)90183-X |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) |
geographic |
Arctic Arctic Ocean Gakkel Ridge North Pole |
geographic_facet |
Arctic Arctic Ocean Gakkel Ridge North Pole |
genre |
Arctic Arctic Arctic Ocean Fram Strait Nansen Basin Neogloboquadrina pachyderma North Pole Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Fram Strait Nansen Basin Neogloboquadrina pachyderma North Pole Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/31813/1/Spielhagen_Marine%20Geology.de.pdf Spielhagen, R. F. and Erlenkeuser, H. (1994) Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surface water layer. Marine Geology, 119 (3-4). pp. 227-250. DOI 10.1016/0025-3227(94)90183-X <https://doi.org/10.1016/0025-3227%2894%2990183-X>. doi:10.1016/0025-3227(94)90183-X |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/0025-3227(94)90183-X |
container_title |
Marine Geology |
container_volume |
119 |
container_issue |
3-4 |
container_start_page |
227 |
op_container_end_page |
250 |
_version_ |
1766300616599011328 |