Geochemistry of sediment core PS2456-4
Sediment core PS2458 from the Laptev Sea continental margin (983-m water depth) stems from a position close to the paleoriver mouth of Lena and Yana rivers. It was dated by AMS-14C and analyzed in high resolution for oxygen isotopes of planktic foraminifers. Except the uppermost 100 cm and possibly...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.738265 2023-05-15T14:25:02+02:00 Geochemistry of sediment core PS2456-4 Spielhagen, Robert F Siegert, Christine Erlenkeuser, Helmut LATITUDE: 78.166667 * LONGITUDE: 133.398333 * DATE/TIME START: 1993-09-05T00:00:00 * DATE/TIME END: 1993-09-05T00:00:00 2005-05-19 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.738265 https://doi.org/10.1594/PANGAEA.738265 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.738265 https://doi.org/10.1594/PANGAEA.738265 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Spielhagen, Robert F; Siegert, Christine; Erlenkeuser, Helmut (2005): History of freshwater runoff across the Laptev Sea (Arctic) during the last degaciation. Global and Planetary Change, 48, 187-207, https://doi.org/10.1016/j.gloplacha.2004.12.013 ARK-IX/4 KAL Kasten corer Laptev Sea Polarstern PS2458-4 PS27 PS27/038 Quaternary Environment of the Eurasian North QUEEN Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.738265 https://doi.org/10.1016/j.gloplacha.2004.12.013 2023-01-20T07:31:46Z Sediment core PS2458 from the Laptev Sea continental margin (983-m water depth) stems from a position close to the paleoriver mouth of Lena and Yana rivers. It was dated by AMS-14C and analyzed in high resolution for oxygen isotopes of planktic foraminifers. Except the uppermost 100 cm and possibly the lowermost meter of the 8-m-long core, the sediments were deposited during the last deglaciation (14.5-8.0 cal-ka). According to 210Pb data, the uppermost 100 cm represents only the last 200 years. Planktic foraminifers are present throughout the dated deglacial interval, with the exception of a short time after ca. 13 cal-ka. Taking into account the global "ice volume effect" on the oxygen isotopic composition of the foraminifers, the isotopic record is considered to reflect salinity changes which were influenced by variable freshwater runoff and a growing marine influence during the postglacial transgression of the Laptev Sea shelf. The most conspicuous feature in the isotopic record is an outstanding peak dated to ca. 13 cal-ka. It is proposed that it represents a rapid outburst of large amounts of freshwater, possibly from an ice-dammed lake in the hinterland. Possible correlations to the onset of the cool Younger Dryas event in the northern hemisphere are discussed. Dataset Arctic laptev Laptev Sea PANGAEA - Data Publisher for Earth & Environmental Science Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Laptev Sea ENVELOPE(133.398333,133.398333,78.166667,78.166667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ARK-IX/4 KAL Kasten corer Laptev Sea Polarstern PS2458-4 PS27 PS27/038 Quaternary Environment of the Eurasian North QUEEN |
spellingShingle |
ARK-IX/4 KAL Kasten corer Laptev Sea Polarstern PS2458-4 PS27 PS27/038 Quaternary Environment of the Eurasian North QUEEN Spielhagen, Robert F Siegert, Christine Erlenkeuser, Helmut Geochemistry of sediment core PS2456-4 |
topic_facet |
ARK-IX/4 KAL Kasten corer Laptev Sea Polarstern PS2458-4 PS27 PS27/038 Quaternary Environment of the Eurasian North QUEEN |
description |
Sediment core PS2458 from the Laptev Sea continental margin (983-m water depth) stems from a position close to the paleoriver mouth of Lena and Yana rivers. It was dated by AMS-14C and analyzed in high resolution for oxygen isotopes of planktic foraminifers. Except the uppermost 100 cm and possibly the lowermost meter of the 8-m-long core, the sediments were deposited during the last deglaciation (14.5-8.0 cal-ka). According to 210Pb data, the uppermost 100 cm represents only the last 200 years. Planktic foraminifers are present throughout the dated deglacial interval, with the exception of a short time after ca. 13 cal-ka. Taking into account the global "ice volume effect" on the oxygen isotopic composition of the foraminifers, the isotopic record is considered to reflect salinity changes which were influenced by variable freshwater runoff and a growing marine influence during the postglacial transgression of the Laptev Sea shelf. The most conspicuous feature in the isotopic record is an outstanding peak dated to ca. 13 cal-ka. It is proposed that it represents a rapid outburst of large amounts of freshwater, possibly from an ice-dammed lake in the hinterland. Possible correlations to the onset of the cool Younger Dryas event in the northern hemisphere are discussed. |
format |
Dataset |
author |
Spielhagen, Robert F Siegert, Christine Erlenkeuser, Helmut |
author_facet |
Spielhagen, Robert F Siegert, Christine Erlenkeuser, Helmut |
author_sort |
Spielhagen, Robert F |
title |
Geochemistry of sediment core PS2456-4 |
title_short |
Geochemistry of sediment core PS2456-4 |
title_full |
Geochemistry of sediment core PS2456-4 |
title_fullStr |
Geochemistry of sediment core PS2456-4 |
title_full_unstemmed |
Geochemistry of sediment core PS2456-4 |
title_sort |
geochemistry of sediment core ps2456-4 |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.738265 https://doi.org/10.1594/PANGAEA.738265 |
op_coverage |
LATITUDE: 78.166667 * LONGITUDE: 133.398333 * DATE/TIME START: 1993-09-05T00:00:00 * DATE/TIME END: 1993-09-05T00:00:00 |
long_lat |
ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(133.398333,133.398333,78.166667,78.166667) |
geographic |
Dammed Lake Laptev Sea |
geographic_facet |
Dammed Lake Laptev Sea |
genre |
Arctic laptev Laptev Sea |
genre_facet |
Arctic laptev Laptev Sea |
op_source |
Supplement to: Spielhagen, Robert F; Siegert, Christine; Erlenkeuser, Helmut (2005): History of freshwater runoff across the Laptev Sea (Arctic) during the last degaciation. Global and Planetary Change, 48, 187-207, https://doi.org/10.1016/j.gloplacha.2004.12.013 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.738265 https://doi.org/10.1594/PANGAEA.738265 |
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.738265 https://doi.org/10.1016/j.gloplacha.2004.12.013 |
_version_ |
1766297466714456064 |