History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation
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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ftoceanrep:oai:oceanrep.geomar.de:4289 2023-05-15T14:26:18+02:00 History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation Spielhagen, Robert F. Erlenkeuser, Helmut Siegert, Christine 2005 text https://oceanrep.geomar.de/id/eprint/4289/ https://oceanrep.geomar.de/id/eprint/4289/1/2005_Spielhagen-etal-History_GPC-48.pdf https://doi.org/10.1016/j.gloplacha.2004.12.013 en eng Elsevier https://oceanrep.geomar.de/id/eprint/4289/1/2005_Spielhagen-etal-History_GPC-48.pdf Spielhagen, R. F., Erlenkeuser, H. and Siegert, C. (2005) History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation. Global and Planetary Change, 48 (1-3). pp. 187-207. DOI 10.1016/j.gloplacha.2004.12.013 <https://doi.org/10.1016/j.gloplacha.2004.12.013>. doi:10.1016/j.gloplacha.2004.12.013 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2005 ftoceanrep https://doi.org/10.1016/j.gloplacha.2004.12.013 2023-04-07T14:49:19Z 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. Article in Journal/Newspaper Arctic Arctic laptev Laptev Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Laptev Sea Global and Planetary Change 48 1-3 187 207 |
institution |
Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
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 |
Article in Journal/Newspaper |
author |
Spielhagen, Robert F. Erlenkeuser, Helmut Siegert, Christine |
spellingShingle |
Spielhagen, Robert F. Erlenkeuser, Helmut Siegert, Christine History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation |
author_facet |
Spielhagen, Robert F. Erlenkeuser, Helmut Siegert, Christine |
author_sort |
Spielhagen, Robert F. |
title |
History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation |
title_short |
History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation |
title_full |
History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation |
title_fullStr |
History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation |
title_full_unstemmed |
History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation |
title_sort |
history of freshwater runoff across the laptev sea (arctic) during the last deglaciation |
publisher |
Elsevier |
publishDate |
2005 |
url |
https://oceanrep.geomar.de/id/eprint/4289/ https://oceanrep.geomar.de/id/eprint/4289/1/2005_Spielhagen-etal-History_GPC-48.pdf https://doi.org/10.1016/j.gloplacha.2004.12.013 |
long_lat |
ENVELOPE(-68.258,-68.258,68.496,68.496) |
geographic |
Arctic Dammed Lake Laptev Sea |
geographic_facet |
Arctic Dammed Lake Laptev Sea |
genre |
Arctic Arctic laptev Laptev Sea |
genre_facet |
Arctic Arctic laptev Laptev Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/4289/1/2005_Spielhagen-etal-History_GPC-48.pdf Spielhagen, R. F., Erlenkeuser, H. and Siegert, C. (2005) History of freshwater runoff across the Laptev Sea (Arctic) during the last deglaciation. Global and Planetary Change, 48 (1-3). pp. 187-207. DOI 10.1016/j.gloplacha.2004.12.013 <https://doi.org/10.1016/j.gloplacha.2004.12.013>. doi:10.1016/j.gloplacha.2004.12.013 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2004.12.013 |
container_title |
Global and Planetary Change |
container_volume |
48 |
container_issue |
1-3 |
container_start_page |
187 |
op_container_end_page |
207 |
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1766298791403585536 |