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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Södertörns högskola, Miljövetenskap
2015
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-28908 https://doi.org/10.5194/sd-20-1-2015 |
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ftsoedertoernsho:oai:DiVA.org:sh-28908 2023-07-16T03:59:04+02:00 IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere Andrén, Thomas Jørgensen, Bo Barker Cotterill, Carol Green, Sophie 2015 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-28908 https://doi.org/10.5194/sd-20-1-2015 eng eng Södertörns högskola, Miljövetenskap Scientific Drilling, 1816-8957, 2015, 20, s. 1-12 orcid:0000-0001-5615-6088 http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-28908 doi:10.5194/sd-20-1-2015 ISI:000379423200002 Scopus 2-s2.0-84952026569 Local 48/42/2013 info:eu-repo/semantics/openAccess Baltic Sea paleoenvironment IODP ECORD Geology Geologi Article in journal info:eu-repo/semantics/article text 2015 ftsoedertoernsho https://doi.org/10.5194/sd-20-1-2015 2023-06-26T22:12:04Z 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 theWeichselian, 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 50m 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 Södertörn University College: Publications (DiVA) Scientific Drilling 20 1 12 |
institution |
Open Polar |
collection |
Södertörn University College: Publications (DiVA) |
op_collection_id |
ftsoedertoernsho |
language |
English |
topic |
Baltic Sea paleoenvironment IODP ECORD Geology Geologi |
spellingShingle |
Baltic Sea paleoenvironment IODP ECORD Geology Geologi Andrén, Thomas Jørgensen, Bo Barker Cotterill, Carol Green, Sophie IODP expedition 347 : Baltic Sea basin paleoenvironment and biosphere |
topic_facet |
Baltic Sea paleoenvironment IODP ECORD 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 theWeichselian, 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 50m 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, Thomas Jørgensen, Bo Barker Cotterill, Carol Green, Sophie |
author_facet |
Andrén, Thomas Jørgensen, Bo Barker Cotterill, Carol Green, Sophie |
author_sort |
Andrén, Thomas |
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 |
Södertörns högskola, Miljövetenskap |
publishDate |
2015 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-28908 https://doi.org/10.5194/sd-20-1-2015 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Scientific Drilling, 1816-8957, 2015, 20, s. 1-12 orcid:0000-0001-5615-6088 http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-28908 doi:10.5194/sd-20-1-2015 ISI:000379423200002 Scopus 2-s2.0-84952026569 Local 48/42/2013 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/sd-20-1-2015 |
container_title |
Scientific Drilling |
container_volume |
20 |
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1 |
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12 |
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1771546522169638912 |