Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean
A high-resolution study including oxygen and carbon stable isotopes as well as carbonate and total organic carbon contents, has been performed on undisturbed near-surface (0-40 cm) sediment sequences taken in the eastern Arctic Ocean during the international Arctic 91 Expedition. Based on the oxygen...
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Format: | Other/Unknown Material |
Language: | English |
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PANGAEA
1994
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Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.728634 https://doi.org/10.1594/PANGAEA.728634 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728634 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Amundsen Basin ARK-VIII/3 AWI_Paleo Gakkel Ridge Arctic Ocean Giant box corer GKG Gravity corer (Kiel type) Lomonosov Ridge Makarov Basin Morris Jesup Rise MUC MultiCorer Nansen Basin Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS19/152 PS19/154 PS19/157 PS19/159 PS19/165 PS19/172 PS19/175 PS19/176 PS19/178 PS19/185 PS19/186 PS19/194 PS19/198 PS19/200 PS19/210 PS19/214 PS19/218 PS19/222 PS19/224 PS19/226 PS19/228 PS19/234 PS19/241 PS19/245 PS19 ARCTIC91 PS2159-3 PS2161-1 PS2163-1 PS2165-5 PS2170-4 PS2175-4 PS2177-3 PS2178-4 |
spellingShingle |
Amundsen Basin ARK-VIII/3 AWI_Paleo Gakkel Ridge Arctic Ocean Giant box corer GKG Gravity corer (Kiel type) Lomonosov Ridge Makarov Basin Morris Jesup Rise MUC MultiCorer Nansen Basin Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS19/152 PS19/154 PS19/157 PS19/159 PS19/165 PS19/172 PS19/175 PS19/176 PS19/178 PS19/185 PS19/186 PS19/194 PS19/198 PS19/200 PS19/210 PS19/214 PS19/218 PS19/222 PS19/224 PS19/226 PS19/228 PS19/234 PS19/241 PS19/245 PS19 ARCTIC91 PS2159-3 PS2161-1 PS2163-1 PS2165-5 PS2170-4 PS2175-4 PS2177-3 PS2178-4 Stein, Ruediger Schubert, Carsten J Vogt, Christoph Fütterer, Dieter K Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean |
topic_facet |
Amundsen Basin ARK-VIII/3 AWI_Paleo Gakkel Ridge Arctic Ocean Giant box corer GKG Gravity corer (Kiel type) Lomonosov Ridge Makarov Basin Morris Jesup Rise MUC MultiCorer Nansen Basin Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS19/152 PS19/154 PS19/157 PS19/159 PS19/165 PS19/172 PS19/175 PS19/176 PS19/178 PS19/185 PS19/186 PS19/194 PS19/198 PS19/200 PS19/210 PS19/214 PS19/218 PS19/222 PS19/224 PS19/226 PS19/228 PS19/234 PS19/241 PS19/245 PS19 ARCTIC91 PS2159-3 PS2161-1 PS2163-1 PS2165-5 PS2170-4 PS2175-4 PS2177-3 PS2178-4 |
description |
A high-resolution study including oxygen and carbon stable isotopes as well as carbonate and total organic carbon contents, has been performed on undisturbed near-surface (0-40 cm) sediment sequences taken in the eastern Arctic Ocean during the international Arctic 91 Expedition. Based on the oxygen stable isotope records measured on Neogloboquadrina pachyderma (sin.) and AMS 14C dating, the upper 10 to 20 cm of the sediment sequences represent isotope stage 1, and the base of Termination I (15.7 ka) can be identified very well. Stage 1 sedimentation rates vary between 0.4 and >2.0 cm/kyr. In general, glacial stage 2 sedimentation rates are probably lower and vary between 0.4 and 0.7 cm/kyr. The glacial-interglacial shifts in delta18O values of N. pachyderma sin. may reach values of 1.3 to 2.5 per mil indicating (1) that, in addition to the glacial-interglacial global ice-volume signal, changes in surface-water salinity have effected the isotope records and (2) that these salinity changes have varied laterally. Glacial-interglacial differences in salinity were small in the Lomonosov Ridge area (0-0.4 per mil) and relatively high in the Morris-Jesup-Rise area (up to 1.4 per mil). This implies that the supply of low-saline waters onto the Eurasian shelves and its further transport into the central Arctic Ocean via the Transpolar Drift should have continued during the last glacial and should have significantly influenced the surface water characteristics in parts of the central Arctic. On the Morris-Jesup-Rise, on the other hand, the glacial low-saline-water signal at that time was strongly reduced in comparison to the modern situation. At the glacial-interglacial stage 1/2 boundary, a strong meltwater signal is recorded in a sharp depletion in delta18O as well as delta13C. This central Arctic Ocean meltwater event can be correlated from the Makarov Basin through the Lomonosov Ridge and Amundsen Basin to the eastern Gakkel Ridge. The beginning of this event is AMS 14C dated at 15.7 ka, i.e., significantly older ... |
format |
Other/Unknown Material |
author |
Stein, Ruediger Schubert, Carsten J Vogt, Christoph Fütterer, Dieter K |
author_facet |
Stein, Ruediger Schubert, Carsten J Vogt, Christoph Fütterer, Dieter K |
author_sort |
Stein, Ruediger |
title |
Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean |
title_short |
Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean |
title_full |
Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean |
title_fullStr |
Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean |
title_full_unstemmed |
Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean |
title_sort |
stable oxygen and carbon isotope ratios of neogloboquadrina pachyderma from latest pleistocene to holocene sediments of the eastern central arctic ocean |
publisher |
PANGAEA |
publishDate |
1994 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.728634 https://doi.org/10.1594/PANGAEA.728634 |
op_coverage |
MEDIAN LATITUDE: 86.062043 * MEDIAN LONGITUDE: 42.115407 * SOUTH-BOUND LATITUDE: 82.023700 * WEST-BOUND LONGITUDE: -14.368700 * NORTH-BOUND LATITUDE: 90.000000 * EAST-BOUND LONGITUDE: 159.167500 * DATE/TIME START: 1991-08-09T00:00:00 * DATE/TIME END: 1991-09-29T00:00:00 |
long_lat |
ENVELOPE(-14.368700,159.167500,90.000000,82.023700) |
genre |
amundsen basin Arctic Arctic Ocean Lomonosov Ridge makarov basin Nansen Basin Neogloboquadrina pachyderma |
genre_facet |
amundsen basin Arctic Arctic Ocean Lomonosov Ridge makarov basin Nansen Basin Neogloboquadrina pachyderma |
op_source |
Supplement to: Stein, Ruediger; Schubert, Carsten J; Vogt, Christoph; Fütterer, Dieter K (1994): Stable isotope stratigraphy, sedimentation rates, and salinity changes in the latest Pleistocene and Holocene eastern central Arctic Ocean. Marine Geology, 119(3-4), 333-355, https://doi.org/10.1016/0025-3227(94)90189-9 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.728634 https://doi.org/10.1594/PANGAEA.728634 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.72863410.1016/0025-3227(94)90189-9 |
_version_ |
1810475729603788800 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728634 2024-09-15T17:38:51+00:00 Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean Stein, Ruediger Schubert, Carsten J Vogt, Christoph Fütterer, Dieter K MEDIAN LATITUDE: 86.062043 * MEDIAN LONGITUDE: 42.115407 * SOUTH-BOUND LATITUDE: 82.023700 * WEST-BOUND LONGITUDE: -14.368700 * NORTH-BOUND LATITUDE: 90.000000 * EAST-BOUND LONGITUDE: 159.167500 * DATE/TIME START: 1991-08-09T00:00:00 * DATE/TIME END: 1991-09-29T00:00:00 1994 application/zip, 28 datasets https://doi.pangaea.de/10.1594/PANGAEA.728634 https://doi.org/10.1594/PANGAEA.728634 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.728634 https://doi.org/10.1594/PANGAEA.728634 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Stein, Ruediger; Schubert, Carsten J; Vogt, Christoph; Fütterer, Dieter K (1994): Stable isotope stratigraphy, sedimentation rates, and salinity changes in the latest Pleistocene and Holocene eastern central Arctic Ocean. Marine Geology, 119(3-4), 333-355, https://doi.org/10.1016/0025-3227(94)90189-9 Amundsen Basin ARK-VIII/3 AWI_Paleo Gakkel Ridge Arctic Ocean Giant box corer GKG Gravity corer (Kiel type) Lomonosov Ridge Makarov Basin Morris Jesup Rise MUC MultiCorer Nansen Basin Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS19/152 PS19/154 PS19/157 PS19/159 PS19/165 PS19/172 PS19/175 PS19/176 PS19/178 PS19/185 PS19/186 PS19/194 PS19/198 PS19/200 PS19/210 PS19/214 PS19/218 PS19/222 PS19/224 PS19/226 PS19/228 PS19/234 PS19/241 PS19/245 PS19 ARCTIC91 PS2159-3 PS2161-1 PS2163-1 PS2165-5 PS2170-4 PS2175-4 PS2177-3 PS2178-4 dataset publication series 1994 ftpangaea https://doi.org/10.1594/PANGAEA.72863410.1016/0025-3227(94)90189-9 2024-07-24T02:31:20Z A high-resolution study including oxygen and carbon stable isotopes as well as carbonate and total organic carbon contents, has been performed on undisturbed near-surface (0-40 cm) sediment sequences taken in the eastern Arctic Ocean during the international Arctic 91 Expedition. Based on the oxygen stable isotope records measured on Neogloboquadrina pachyderma (sin.) and AMS 14C dating, the upper 10 to 20 cm of the sediment sequences represent isotope stage 1, and the base of Termination I (15.7 ka) can be identified very well. Stage 1 sedimentation rates vary between 0.4 and >2.0 cm/kyr. In general, glacial stage 2 sedimentation rates are probably lower and vary between 0.4 and 0.7 cm/kyr. The glacial-interglacial shifts in delta18O values of N. pachyderma sin. may reach values of 1.3 to 2.5 per mil indicating (1) that, in addition to the glacial-interglacial global ice-volume signal, changes in surface-water salinity have effected the isotope records and (2) that these salinity changes have varied laterally. Glacial-interglacial differences in salinity were small in the Lomonosov Ridge area (0-0.4 per mil) and relatively high in the Morris-Jesup-Rise area (up to 1.4 per mil). This implies that the supply of low-saline waters onto the Eurasian shelves and its further transport into the central Arctic Ocean via the Transpolar Drift should have continued during the last glacial and should have significantly influenced the surface water characteristics in parts of the central Arctic. On the Morris-Jesup-Rise, on the other hand, the glacial low-saline-water signal at that time was strongly reduced in comparison to the modern situation. At the glacial-interglacial stage 1/2 boundary, a strong meltwater signal is recorded in a sharp depletion in delta18O as well as delta13C. This central Arctic Ocean meltwater event can be correlated from the Makarov Basin through the Lomonosov Ridge and Amundsen Basin to the eastern Gakkel Ridge. The beginning of this event is AMS 14C dated at 15.7 ka, i.e., significantly older ... Other/Unknown Material amundsen basin Arctic Arctic Ocean Lomonosov Ridge makarov basin Nansen Basin Neogloboquadrina pachyderma PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-14.368700,159.167500,90.000000,82.023700) |