IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere
The Integrated Ocean Drilling Program (IODP) expedition 347 cored sediments from different settings of the Baltic Sea covering the last glacial–interglacial cycle. The main aim was to study the geological development of the Baltic Sea in relation to the extreme climate variability of the region with...
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ftuppsalauniv:oai:DiVA.org:uu-270195 2023-11-12T04:18:52+01:00 IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere Andrén, T. Barker Jørgensen, B. Cotterill, C. Green, S. 2015 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270195 https://doi.org/10.5194/sd-20-1-2015 eng eng Copernicus GmbH Scientific Drilling, 1816-8957, 2015, 20:2, s. 1-12 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270195 doi:10.5194/sd-20-1-2015 info:eu-repo/semantics/openAccess Geology Geologi Article in journal info:eu-repo/semantics/article text 2015 ftuppsalauniv https://doi.org/10.5194/sd-20-1-2015 2023-10-25T22:31:52Z The Integrated Ocean Drilling Program (IODP) expedition 347 cored sediments from different settings of the Baltic Sea covering the last glacial–interglacial cycle. The main aim was to study the geological development of the Baltic Sea in relation to the extreme climate variability of the region with changing ice cover and major shifts in temperature, salinity, and biological communities. Using the Greatship Manisha as a European Consortium for Ocean Research Drilling (ECORD) mission-specific platform, we recovered 1.6 km of core from nine sites of which four were additionally cored for microbiology. The sites covered the gateway to the North Sea and Atlantic Ocean, several sub-basins in the southern Baltic Sea, a deep basin in the central Baltic Sea, and a river estuary in the north. The waxing and waning of the Scandinavian ice sheet has profoundly affected the Baltic Sea sediments. During the Weichselian, progressing glaciers reshaped the submarine landscape and displaced sedimentary deposits from earlier Quaternary time. As the glaciers retreated they left a complex pattern of till, sand, and lacustrine clay, which in the basins has since been covered by a thick deposit of Holocene, organic-rich clay. Due to the stratified water column of the brackish Baltic Sea and the recurrent and widespread anoxia, the deeper basins harbor laminated sediments that provide a unique opportunity for high-resolution chronological studies. The Baltic Sea is a eutrophic intra-continental sea that is strongly impacted by terrestrial runoff and nutrient fluxes. The Holocene deposits are recorded today to be up to 50 m deep and geochemically affected by diagenetic alterations driven by organic matter degradation. Many of the cored sequences were highly supersaturated with respect to methane, which caused strong degassing upon core recovery. The depth distributions of conservative sea water ions still reflected the transition at the end of the last glaciation from fresh-water clays to Holocene brackish mud. High-resolution sampling ... Article in Journal/Newspaper Ice Sheet Uppsala University: Publications (DiVA) Scientific Drilling 20 1 12 |
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Uppsala University: Publications (DiVA) |
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ftuppsalauniv |
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English |
topic |
Geology Geologi |
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Geology Geologi Andrén, T. Barker Jørgensen, B. Cotterill, C. Green, S. IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere |
topic_facet |
Geology Geologi |
description |
The Integrated Ocean Drilling Program (IODP) expedition 347 cored sediments from different settings of the Baltic Sea covering the last glacial–interglacial cycle. The main aim was to study the geological development of the Baltic Sea in relation to the extreme climate variability of the region with changing ice cover and major shifts in temperature, salinity, and biological communities. Using the Greatship Manisha as a European Consortium for Ocean Research Drilling (ECORD) mission-specific platform, we recovered 1.6 km of core from nine sites of which four were additionally cored for microbiology. The sites covered the gateway to the North Sea and Atlantic Ocean, several sub-basins in the southern Baltic Sea, a deep basin in the central Baltic Sea, and a river estuary in the north. The waxing and waning of the Scandinavian ice sheet has profoundly affected the Baltic Sea sediments. During the Weichselian, progressing glaciers reshaped the submarine landscape and displaced sedimentary deposits from earlier Quaternary time. As the glaciers retreated they left a complex pattern of till, sand, and lacustrine clay, which in the basins has since been covered by a thick deposit of Holocene, organic-rich clay. Due to the stratified water column of the brackish Baltic Sea and the recurrent and widespread anoxia, the deeper basins harbor laminated sediments that provide a unique opportunity for high-resolution chronological studies. The Baltic Sea is a eutrophic intra-continental sea that is strongly impacted by terrestrial runoff and nutrient fluxes. The Holocene deposits are recorded today to be up to 50 m deep and geochemically affected by diagenetic alterations driven by organic matter degradation. Many of the cored sequences were highly supersaturated with respect to methane, which caused strong degassing upon core recovery. The depth distributions of conservative sea water ions still reflected the transition at the end of the last glaciation from fresh-water clays to Holocene brackish mud. High-resolution sampling ... |
format |
Article in Journal/Newspaper |
author |
Andrén, T. Barker Jørgensen, B. Cotterill, C. Green, S. |
author_facet |
Andrén, T. Barker Jørgensen, B. Cotterill, C. Green, S. |
author_sort |
Andrén, T. |
title |
IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere |
title_short |
IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere |
title_full |
IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere |
title_fullStr |
IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere |
title_full_unstemmed |
IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere |
title_sort |
iodp expedition 347 : baltic sea basin paleoenvironment and biosphere |
publisher |
Copernicus GmbH |
publishDate |
2015 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270195 https://doi.org/10.5194/sd-20-1-2015 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Scientific Drilling, 1816-8957, 2015, 20:2, s. 1-12 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270195 doi:10.5194/sd-20-1-2015 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/sd-20-1-2015 |
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Scientific Drilling |
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20 |
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1 |
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12 |
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1782335401463119872 |