Sea-surface temperature reconstruction of sediment cores from the Skagerrak
We attempt a reconstruction of salinity levels of the central Baltic Sea based on diatom assemblages, the isotopic composition of organic matter and sedimentological expression of anoxia over the last 10 000 years. We use the data to investigate the dependence of salinity levels on climate evolution...
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2003
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.738458 2023-05-15T17:35:58+02:00 Sea-surface temperature reconstruction of sediment cores from the Skagerrak Emeis, Kay-Christian Struck, Ulrich Blanz, Thomas Kohly, Alexander Voss, Maren MEDIAN LATITUDE: 57.691308 * MEDIAN LONGITUDE: 9.957625 * SOUTH-BOUND LATITUDE: 57.385000 * WEST-BOUND LONGITUDE: 7.091000 * NORTH-BOUND LATITUDE: 57.838000 * EAST-BOUND LONGITUDE: 20.258500 2003-05-31 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.738458 https://doi.org/10.1594/PANGAEA.738458 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.738458 https://doi.org/10.1594/PANGAEA.738458 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Emeis, Kay-Christian; Struck, Ulrich; Blanz, Thomas; Kohly, Alexander; Voss, Maren (2003): Salinity changes in the central Baltic Sea (NW Europe) over the last 10000 years. The Holocene, 13(3), 411-421, https://doi.org/10.1191/0959683603hl634rp 225514 225517 Alexander von Humboldt AvH94.44.13.2 Baltic Sea GC Gravity corer IOW20007-1 IOW20048-1 IOW225514 IOW225517 KAL Kasten corer MUC MultiCorer POS204 Poseidon Dataset 2003 ftpangaea https://doi.org/10.1594/PANGAEA.738458 https://doi.org/10.1191/0959683603hl634rp 2023-01-20T07:31:48Z We attempt a reconstruction of salinity levels of the central Baltic Sea based on diatom assemblages, the isotopic composition of organic matter and sedimentological expression of anoxia over the last 10 000 years. We use the data to investigate the dependence of salinity levels on climate evolution and isostasy. Changes in salinity of surface and deep waters were most pronounced from 8400 to approximately 5000 cal. BP. Density stratification between salty deep and fresher surface waters caused the frequent development of anoxic conditions and deposition of laminated sediments on large parts of the sea floor in the central Baltic Sea, and dramatic changes in organic carbon-accumulation rates. From 5000 to 3100 cal. BP, the salinity of the basin decreased, oxygenation of deep sea floors was improved, and fertility of the sea surface was significantly reduced. This is reflected by low accumulation rates of organic carbon in bioturbated sediments. Since 2800 cal. BP, salinity rose again and anoxic periods were more common. Even though the major steps in environmental evolution in the Baltic Sea coincide with known patterns of climatic change of the North Atlantic realm over the last 10 000 years, we find no conclusive evidence for synchronous changes or linear responses on submillennial timescales. However, we note that major variations in our salinity records agree with temporal patterns of reconstructed summer warmth and winter precipitation in southern Scandinavia. Both types of record suggest that climate in the mid-Holocene was far from stable. Our data also confirm that climate evolution over the late Holocene had significant impact on environmental conditions in the Baltic Sea. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(7.091000,20.258500,57.838000,57.385000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
225514 225517 Alexander von Humboldt AvH94.44.13.2 Baltic Sea GC Gravity corer IOW20007-1 IOW20048-1 IOW225514 IOW225517 KAL Kasten corer MUC MultiCorer POS204 Poseidon |
spellingShingle |
225514 225517 Alexander von Humboldt AvH94.44.13.2 Baltic Sea GC Gravity corer IOW20007-1 IOW20048-1 IOW225514 IOW225517 KAL Kasten corer MUC MultiCorer POS204 Poseidon Emeis, Kay-Christian Struck, Ulrich Blanz, Thomas Kohly, Alexander Voss, Maren Sea-surface temperature reconstruction of sediment cores from the Skagerrak |
topic_facet |
225514 225517 Alexander von Humboldt AvH94.44.13.2 Baltic Sea GC Gravity corer IOW20007-1 IOW20048-1 IOW225514 IOW225517 KAL Kasten corer MUC MultiCorer POS204 Poseidon |
description |
We attempt a reconstruction of salinity levels of the central Baltic Sea based on diatom assemblages, the isotopic composition of organic matter and sedimentological expression of anoxia over the last 10 000 years. We use the data to investigate the dependence of salinity levels on climate evolution and isostasy. Changes in salinity of surface and deep waters were most pronounced from 8400 to approximately 5000 cal. BP. Density stratification between salty deep and fresher surface waters caused the frequent development of anoxic conditions and deposition of laminated sediments on large parts of the sea floor in the central Baltic Sea, and dramatic changes in organic carbon-accumulation rates. From 5000 to 3100 cal. BP, the salinity of the basin decreased, oxygenation of deep sea floors was improved, and fertility of the sea surface was significantly reduced. This is reflected by low accumulation rates of organic carbon in bioturbated sediments. Since 2800 cal. BP, salinity rose again and anoxic periods were more common. Even though the major steps in environmental evolution in the Baltic Sea coincide with known patterns of climatic change of the North Atlantic realm over the last 10 000 years, we find no conclusive evidence for synchronous changes or linear responses on submillennial timescales. However, we note that major variations in our salinity records agree with temporal patterns of reconstructed summer warmth and winter precipitation in southern Scandinavia. Both types of record suggest that climate in the mid-Holocene was far from stable. Our data also confirm that climate evolution over the late Holocene had significant impact on environmental conditions in the Baltic Sea. |
format |
Dataset |
author |
Emeis, Kay-Christian Struck, Ulrich Blanz, Thomas Kohly, Alexander Voss, Maren |
author_facet |
Emeis, Kay-Christian Struck, Ulrich Blanz, Thomas Kohly, Alexander Voss, Maren |
author_sort |
Emeis, Kay-Christian |
title |
Sea-surface temperature reconstruction of sediment cores from the Skagerrak |
title_short |
Sea-surface temperature reconstruction of sediment cores from the Skagerrak |
title_full |
Sea-surface temperature reconstruction of sediment cores from the Skagerrak |
title_fullStr |
Sea-surface temperature reconstruction of sediment cores from the Skagerrak |
title_full_unstemmed |
Sea-surface temperature reconstruction of sediment cores from the Skagerrak |
title_sort |
sea-surface temperature reconstruction of sediment cores from the skagerrak |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.738458 https://doi.org/10.1594/PANGAEA.738458 |
op_coverage |
MEDIAN LATITUDE: 57.691308 * MEDIAN LONGITUDE: 9.957625 * SOUTH-BOUND LATITUDE: 57.385000 * WEST-BOUND LONGITUDE: 7.091000 * NORTH-BOUND LATITUDE: 57.838000 * EAST-BOUND LONGITUDE: 20.258500 |
long_lat |
ENVELOPE(7.091000,20.258500,57.838000,57.385000) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Emeis, Kay-Christian; Struck, Ulrich; Blanz, Thomas; Kohly, Alexander; Voss, Maren (2003): Salinity changes in the central Baltic Sea (NW Europe) over the last 10000 years. The Holocene, 13(3), 411-421, https://doi.org/10.1191/0959683603hl634rp |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.738458 https://doi.org/10.1594/PANGAEA.738458 |
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.738458 https://doi.org/10.1191/0959683603hl634rp |
_version_ |
1766135277462487040 |