Expedition 347 summary

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doi: 10.2204/iodp.proc.347.101.2015
Author(s): Andren, Thomas; Jorgensen, Bo Barker; Cotterill, Carol; Fehr, Annick; Green, Sophie; Andren, Elinor; Ash, Jeanine; Bauersachs, Thorsten; Cragg, Barry; Fanget, Anne-Sophie; Granoszewski, Wojciech; Groeneveld, Jeroen; Hardisty, Dalton; Herrero-Bervera, Emilio; Hyttinen, Outi; Jensen, Jorn Bo; Johnson, Sean; Kenzler, Michael; Kotilainen, Aarno; Kotthoff, Ulrich; Marshall, Ian P. G.; Martin, Ellen; Obrochta, Stephen; Passchier, Sandra; Quintana Krupinski, Nadine; Riedinger, Natascha; Slomp, Caroline; Snowball, Ian; Stepanova, Anna; Strano, Sarah; Torti, Andrea; Warnock, Jonathan; Xiao, Nan; Rui Zhang
Integrated Ocean Drilling Program, Expedition 347 Scientists, College Station, TX
Author Affiliation(s): Primary:
Sodertorn University, School of Natural Sciences, Technology and Environmental Studies, Huddinge, Sweden
Other:
Aarhus University, Denmark
British Geological Survey, United Kingdom
RWTH Aachen University, Germany
University of California, Los Angeles, United States
Christian-Albrechts-University of Kiel, Germany
Cardiff University, United Kingdom
Polish Geological Institute, Poland
University of Bremen, Germany
University of California, Riverside, United States
University of Hawaii, Manoa, United States
University of Helsinki, Finland
Geological Survey of Denmark and Greenland, Denmark
University of Tasmania, Australia
University of Greifswald, Germany
Geological Survey of Finland, Finland
University of Hamburg, Germany
University of Florida, United States
University of Tokyo, Japan
Montclair State University, United States
University of California, Santa Cruz, United States
Utrecht University, Netherlands
Lund University, Sweden
Texas A&M University, United States
Oregon State University, United States
Northern Illinois University, United States
Japan Agency for Marine-Earth Science and Technology, Japan
Xiamen University, China
British Geolgoical Survey, United Kingdom
Volume Title: Proceedings of the Integrated Ocean Drilling Program; Baltic Sea paleoenviornment; Expedition 347 of the mission-specific drilling platform from and to Kiel, Germany; Sites M0059-M0067, 12 September-1 November 2013
Volume Author(s): Andren, Thomas; Jorgensen, Bo Barker; Cotterill, Carol; Fehr, Annick; Green, Sophie; Andren, Elinor; Ash, Jeanine; Bauersachs, Thorsten; Cragg, Barry; Fanget, Anne-Sophie; Granoszewski, Wojciech; Groeneveld, Jeroen; Hardisty, Dalton; Herrero-Bervera, Emilio; Hyttinen, Outi; Jensen, Jorn Bo; Johnson, Sean; Kenzler, Michael; Kotilainen, Aarno; Kotthoff, Ulrich; Marshall, Ian P. G.; Martin, Ellen; Obrochta, Stephen; Passchier, Sandra; Quintana Krupinski, Nadine; Riedinger, Natascha; Slomp, Caroline; Snowball, Ian; Stepanova, Anna; Strano, Sarah; Torti, Andrea; Warnock, Jonathan; Xiao, Nan; Rui Zhang
Source: Proceedings of the Integrated Ocean Drilling Program; Baltic Sea paleoenviornment; Expedition 347 of the mission-specific drilling platform from and to Kiel, Germany; Sites M0059-M0067, 12 September-1 November 2013, Thomas Andren, Bo Barker Jorgensen, Carol Cotterill, Annick Fehr, Sophie Green, Elinor Andren, Jeanine Ash, Thorsten Bauersachs, Barry Cragg, Anne-Sophie Fanget, Wojciech Granoszewski, Jeroen Groeneveld, Dalton Hardisty, Emilio Herrero-Bervera, Outi Hyttinen, Jorn Bo Jensen, Sean Johnson, Michael Kenzler, Aarno Kotilainen, Ulrich Kotthoff, Ian P. G. Marshall, Ellen Martin, Stephen Obrochta, Sandra Passchier, Nadine Quintana Krupinski, Natascha Riedinger, Caroline Slomp, Ian Snowball, Anna Stepanova, Sarah Strano, Andrea Torti, Jonathan Warnock, Nan Xiao and Rui Zhang; Integrated Ocean Drilling Program, Expedition 347 Scientists, College Station, TX. Proceedings of the Integrated Ocean Drilling Program (Online), Vol.347, 66p. Publisher: Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC, United States. ISSN: 1930-1014 CODEN: IDSDA6
Note: In English. 111 refs.; illus., incl. sects., 4 tables, geol. sketch map
Summary: Integrated Ocean Drilling Program Expedition 347 aimed to retrieve sediments from different settings of the Baltic Sea, encompassing the last interglacial-glacial cycle to address scientific questions along four main research themes: 1. Climate and sea level dynamics of marine isotope Stage (MIS) 5, including onsets and terminations; 2. Complexities of the latest glacial, MIS 4-MIS 2; 3. Glacial and Holocene (MIS 2-MIS 1) climate forcing; and 4. Deep biosphere in Baltic Sea Basin (BSB) sediments. These objectives were accomplished by drilling in six subbasins: (1) the gateway of the BSB (Anholt), where we focused on sediments from MIS 6-5 and MIS 2-1; (2) a subbasin in the southwestern BSB (Little Belt) that possibly holds a unique MIS 5 record; (3, 4) two subbasins in the south (Bornholm Basin and Hano Bay) that may hold long complete records from MIS 4-2; (5) a 450 m deep subbasin in the central Baltic (Landsort Deep) that promises to contain a thick and continuous record of the last ∼14,000 y; and (6) a subbasin in the very north (Angermanalven River estuary) that contains a uniquely varved (annually deposited) sediment record of the last 10,000 y. These six areas were expected to contain sediment sequences representative of the last ∼140,000 y, with paleoenvironmental information relevant on a semicontinental scale because the Baltic Sea drains an area four times as large as the basin itself. The location of the BSB in the heartland of a recurrently waning and waxing ice sheet, the Scandinavian Ice Sheet, has resulted in a complex development: repeated glaciations of different magnitudes, sensitive responses to sea level and gateway threshold changes, large shifts in sedimentation patterns, and high sedimentation rates. Its position also makes it a unique link between Eurasian and northwest European terrestrial records. Therefore, the sediments of this largest European intracontinental basin form a rare archive of climate evolution over the latest glacial cycle. High sedimentation rates provide an excellent opportunity to reconstruct climatic variability of global importance at a unique resolution from a marine-brackish setting. Comparable sequences cannot be retrieved anywhere in the surrounding onshore regions. Furthermore, and crucially, the large variability (salinity, climate, sedimentation and oxygenation) that the BSB has undergone during the latest glacial cycle makes it optimal for new research on the deep biosphere and its evolution and biogeochemical processes in a changing environment. The BSB also provides a model for how postglacial diffusive penetration of seawater ions has altered the chemical environment and microbial physiology in the subseafloor biosphere. It is envisaged that the transect of drilled sites, from west to east and from south to north, in this repeatedly glaciated and environmentally very dynamic region will add totally new scientific insights into a variety of research fields. These involve, for example, regional and global issues on the timing and forcing of rapid climate and sea level changes, on mechanisms behind hypoxia-driven processes in intracontinental sea basins, and on the glacial history of the SIS and its interaction with the climate system.
Year of Publication: 2015
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Algae; Arthropoda; Atlantic Ocean; Baltic Sea; Biostratigraphy; Boreholes; Cenozoic; Chemostratigraphy; Climate change; Cores; Correlation; Crustacea; Deglaciation; Diatoms; Dinoflagellata; Expedition 347; Foraminifera; Geomicrobiology; Geophysical methods; Geophysical profiles; Geophysical surveys; Glacial environment; Glaciation; Holocene; Integrated Ocean Drilling Program; Interglacial environment; Invertebrata; Lithostratigraphy; Magnetic properties; Magnetic susceptibility; Magnetostratigraphy; Mandibulata; Marine sediments; Microfossils; Microorganisms; Miospores; North Atlantic; Ostracoda; Paleoclimatology; Paleoenvironment; Paleogeography; Paleomagnetism; Palynomorphs; Physical properties; Plantae; Pleistocene; Pollen; Protista; Quaternary; Sea-level changes; Sediments; Seismic methods; Seismic profiles; Surveys; Upper Pleistocene; Well logs
Coordinates: N550000 N625800 E0181600 E0094800
Record ID: 2015021900
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