Sediment investigations in the Kara Sea
AMS-14C dated sediment cores from the Ob and Yenisei estuaries and the adjacent inner Kara Sea were investigated to determine the siliclastic and organic carbon fluxes and their relationship to paleoenvironmental changes. The variability of sediment fluxes during Holocene times is related to the pos...
Main Authors: | , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2013
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.804871 https://doi.org/10.1594/PANGAEA.804871 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.804871 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Siberian River Run-Off SIRRO |
spellingShingle |
Siberian River Run-Off SIRRO Stein, Ruediger Fahl, Kirsten Dittmers, Klaus Hauke Niessen, Frank Stepanets, Oleg V Sediment investigations in the Kara Sea |
topic_facet |
Siberian River Run-Off SIRRO |
description |
AMS-14C dated sediment cores from the Ob and Yenisei estuaries and the adjacent inner Kara Sea were investigated to determine the siliclastic and organic carbon fluxes and their relationship to paleoenvironmental changes. The variability of sediment fluxes during Holocene times is related to the post-glacial sea-level rise and changes in river discharge and coastal erosion input. Whereas during the late/middle Holocene most of the terrigenous sediments were deposited in the estuaries and the areas directly off the estuaries, huge amounts of sediments accumulated on the Kara Sea shelf farther north during the early Holocene before about 9 Cal. kyrs. BP. The maximum accumulation at that time is related to the lowered sea level, increased coastal erosion, and increased river discharge due to the final stage of mountain deglaciation of the Putoran Massif. Increased supply of Yenisei-derived material indicated by peak magnetic susceptibility values probably occurred in climate-related pulses culminating near 11, 10, and 9 Cal. kyrs. BP. As sea level rose, the main Holocene depocenter migrated southward. Based on hydrogen index values and n-alkanes, the organic matter is predominantly of terrigenous origin. Maximum accumulation rates of 1.5 to more than 6 g/cm**2/y occurred in the early Holocene sediments, suggesting more humid climatic conditions with an increased vegetation cover in the source area at that time. In general, high organic carbon accumulation rates characterize the estuaries and the inner Kara Sea as important sink for terrigenous organic carbon. A high-resolution record of Holocene variability of magnetic susceptibility (MS) in an AMS14C-dated sediment core from the northern Yenisei estuary may indicate natural variability of Arctic climate change and river discharge on a centennial to millenial time scale. Short-term maxima in MS probably related to warmer climate, enhanced precipitation, intensified weathering/erosion and increased river discharge, display a frequency of about 300 to 700 years. |
format |
Dataset |
author |
Stein, Ruediger Fahl, Kirsten Dittmers, Klaus Hauke Niessen, Frank Stepanets, Oleg V |
author_facet |
Stein, Ruediger Fahl, Kirsten Dittmers, Klaus Hauke Niessen, Frank Stepanets, Oleg V |
author_sort |
Stein, Ruediger |
title |
Sediment investigations in the Kara Sea |
title_short |
Sediment investigations in the Kara Sea |
title_full |
Sediment investigations in the Kara Sea |
title_fullStr |
Sediment investigations in the Kara Sea |
title_full_unstemmed |
Sediment investigations in the Kara Sea |
title_sort |
sediment investigations in the kara sea |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.804871 https://doi.org/10.1594/PANGAEA.804871 |
op_coverage |
MEDIAN LATITUDE: 74.667372 * MEDIAN LONGITUDE: 80.659093 * SOUTH-BOUND LATITUDE: 72.930883 * WEST-BOUND LONGITUDE: 73.238467 * NORTH-BOUND LATITUDE: 77.111667 * EAST-BOUND LONGITUDE: 86.748333 * DATE/TIME START: 1999-08-26T00:00:00 * DATE/TIME END: 2001-09-03T00:00:00 |
long_lat |
ENVELOPE(73.238467,86.748333,77.111667,72.930883) |
geographic |
Arctic Kara Sea |
geographic_facet |
Arctic Kara Sea |
genre |
Arctic Berichte zur Polar- und Meeresforschung Berichte zur Polarforschung Climate change Kara Sea Magnetic susceptibility Polar Research Polarforschung Reports on Polar and Marine Research Reports on polar research |
genre_facet |
Arctic Berichte zur Polar- und Meeresforschung Berichte zur Polarforschung Climate change Kara Sea Magnetic susceptibility Polar Research Polarforschung Reports on Polar and Marine Research Reports on polar research |
op_source |
Supplement to: Stein, Ruediger; Fahl, Kirsten; Dittmers, Klaus Hauke; Niessen, Frank; Stepanets, Oleg V (2003): Holocene siliciclastic and organic carbon fluxes in the Ob and Yenisei estuaries and the adjacent inner Kara Sea: Quantification, variability, and paleoenvironmental implications. In: Stein, R; Fahl, K; Fütterer, D K; Galimov, E M & Stepanets, O V (eds.), Siberian River Run-off in the Kara Sea: Characterisation, Quantification, Variability, and Environmental Significance, 488 pp. Proceedings in Marine Sciences, Elsevier, Amsterdam, 6, 401-432 |
op_relation |
Stein, Ruediger; Stepanets, Oleg V (2000): Scientific Cruise Report of the Joint Russian-German Kara-Sea Expedition of RV Akademik Boris Petrov in 1999 (Wissenschaftlicher Fahrtbericht über die russisch-deutsche Karasee-Expedition von 1999 mit FS Akademik Boris Petrov). Berichte zur Polarforschung = Reports on Polar Research, 360, 141 pp, https://doi.org/10.2312/BzP_0360_2000 Stein, Ruediger; Stepanets, Oleg V (2001): The German-Russian Project on Siberian River Run-off (SIRRO): scientific cruise report of the Kara-Sea expedition SIRRO 2000 of RV Akademik Boris Petrov and first results. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 393, 287 pp, https://doi.org/10.2312/BzPM_0393_2001 Stein, Ruediger; Stepanets, Oleg V (2002): Scientific Cruise Report of the Kara-Sea Expedition 2001 of RV Akademik Boris Petrov: The German-Russian Project on Siberian River Run-off (SIRRO) and the EU Project ESTABLISH. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 419, 278 pp, https://doi.org/10.2312/BzPM_0419_2002 https://doi.pangaea.de/10.1594/PANGAEA.804871 https://doi.org/10.1594/PANGAEA.804871 |
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.804871 https://doi.org/10.2312/BzP_0360_2000 https://doi.org/10.2312/BzPM_0393_2001 https://doi.org/10.2312/BzPM_0419_2002 |
_version_ |
1766347746772516864 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.804871 2023-05-15T15:17:30+02:00 Sediment investigations in the Kara Sea Stein, Ruediger Fahl, Kirsten Dittmers, Klaus Hauke Niessen, Frank Stepanets, Oleg V MEDIAN LATITUDE: 74.667372 * MEDIAN LONGITUDE: 80.659093 * SOUTH-BOUND LATITUDE: 72.930883 * WEST-BOUND LONGITUDE: 73.238467 * NORTH-BOUND LATITUDE: 77.111667 * EAST-BOUND LONGITUDE: 86.748333 * DATE/TIME START: 1999-08-26T00:00:00 * DATE/TIME END: 2001-09-03T00:00:00 2013-01-08 application/zip, 13 datasets https://doi.pangaea.de/10.1594/PANGAEA.804871 https://doi.org/10.1594/PANGAEA.804871 en eng PANGAEA Stein, Ruediger; Stepanets, Oleg V (2000): Scientific Cruise Report of the Joint Russian-German Kara-Sea Expedition of RV Akademik Boris Petrov in 1999 (Wissenschaftlicher Fahrtbericht über die russisch-deutsche Karasee-Expedition von 1999 mit FS Akademik Boris Petrov). Berichte zur Polarforschung = Reports on Polar Research, 360, 141 pp, https://doi.org/10.2312/BzP_0360_2000 Stein, Ruediger; Stepanets, Oleg V (2001): The German-Russian Project on Siberian River Run-off (SIRRO): scientific cruise report of the Kara-Sea expedition SIRRO 2000 of RV Akademik Boris Petrov and first results. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 393, 287 pp, https://doi.org/10.2312/BzPM_0393_2001 Stein, Ruediger; Stepanets, Oleg V (2002): Scientific Cruise Report of the Kara-Sea Expedition 2001 of RV Akademik Boris Petrov: The German-Russian Project on Siberian River Run-off (SIRRO) and the EU Project ESTABLISH. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 419, 278 pp, https://doi.org/10.2312/BzPM_0419_2002 https://doi.pangaea.de/10.1594/PANGAEA.804871 https://doi.org/10.1594/PANGAEA.804871 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Stein, Ruediger; Fahl, Kirsten; Dittmers, Klaus Hauke; Niessen, Frank; Stepanets, Oleg V (2003): Holocene siliciclastic and organic carbon fluxes in the Ob and Yenisei estuaries and the adjacent inner Kara Sea: Quantification, variability, and paleoenvironmental implications. In: Stein, R; Fahl, K; Fütterer, D K; Galimov, E M & Stepanets, O V (eds.), Siberian River Run-off in the Kara Sea: Characterisation, Quantification, Variability, and Environmental Significance, 488 pp. Proceedings in Marine Sciences, Elsevier, Amsterdam, 6, 401-432 Siberian River Run-Off SIRRO Dataset 2013 ftpangaea https://doi.org/10.1594/PANGAEA.804871 https://doi.org/10.2312/BzP_0360_2000 https://doi.org/10.2312/BzPM_0393_2001 https://doi.org/10.2312/BzPM_0419_2002 2023-01-20T07:32:50Z AMS-14C dated sediment cores from the Ob and Yenisei estuaries and the adjacent inner Kara Sea were investigated to determine the siliclastic and organic carbon fluxes and their relationship to paleoenvironmental changes. The variability of sediment fluxes during Holocene times is related to the post-glacial sea-level rise and changes in river discharge and coastal erosion input. Whereas during the late/middle Holocene most of the terrigenous sediments were deposited in the estuaries and the areas directly off the estuaries, huge amounts of sediments accumulated on the Kara Sea shelf farther north during the early Holocene before about 9 Cal. kyrs. BP. The maximum accumulation at that time is related to the lowered sea level, increased coastal erosion, and increased river discharge due to the final stage of mountain deglaciation of the Putoran Massif. Increased supply of Yenisei-derived material indicated by peak magnetic susceptibility values probably occurred in climate-related pulses culminating near 11, 10, and 9 Cal. kyrs. BP. As sea level rose, the main Holocene depocenter migrated southward. Based on hydrogen index values and n-alkanes, the organic matter is predominantly of terrigenous origin. Maximum accumulation rates of 1.5 to more than 6 g/cm**2/y occurred in the early Holocene sediments, suggesting more humid climatic conditions with an increased vegetation cover in the source area at that time. In general, high organic carbon accumulation rates characterize the estuaries and the inner Kara Sea as important sink for terrigenous organic carbon. A high-resolution record of Holocene variability of magnetic susceptibility (MS) in an AMS14C-dated sediment core from the northern Yenisei estuary may indicate natural variability of Arctic climate change and river discharge on a centennial to millenial time scale. Short-term maxima in MS probably related to warmer climate, enhanced precipitation, intensified weathering/erosion and increased river discharge, display a frequency of about 300 to 700 years. Dataset Arctic Berichte zur Polar- und Meeresforschung Berichte zur Polarforschung Climate change Kara Sea Magnetic susceptibility Polar Research Polarforschung Reports on Polar and Marine Research Reports on polar research PANGAEA - Data Publisher for Earth & Environmental Science Arctic Kara Sea ENVELOPE(73.238467,86.748333,77.111667,72.930883) |