globalchange  > 气候变化与战略
DOI: 10.1029/2019PA003722
论文题名:
Holocene Hydrographic Variations From the Baltic-North Sea Transitional Area (IODP Site M0059)
作者: Ni S.; Quintana Krupinski N.B.; Groeneveld J.; Fanget A.S.; Böttcher M.E.; Liu B.; Lipka M.; Knudsen K.L.; Naeraa T.; Seidenkrantz M.-S.; Filipsson H.L.
刊名: Paleoceanography and Paleoclimatology
ISSN: 25724517
出版年: 2020
卷: 35, 期:2
语种: 英语
英文关键词: foraminifera ; Holocene Thermal Maximum ; LA-ICP-MS ; NAO ; Skagerrak ; trace elements
Scopus关键词: bottom water ; continental shelf ; global climate ; Holocene ; hypoxic conditions ; Hypsithermal ; North Atlantic Oscillation ; Ocean Drilling Program ; oxygen isotope ; porewater ; reconstruction ; sea level change ; seawater ; sediment core ; Atlantic Ocean ; Atlantic Ocean (North) ; Belt Sea ; Danish Straits ; Denmark ; Europe ; Little Belt ; North Sea ; Elphidium ; Elphidium clavatum ; Foraminifera
英文摘要: Deoxygenation affects many continental shelf seas across the world today and results in increasing areas of hypoxia (dissolved oxygen concentration ([O2]) <1.4 ml/L). The Baltic Sea is increasingly affected by deoxygenation. Deoxygenation correlates with other environmental variables such as changing water temperature and salinity and is directly linked to ongoing global climate change. To place the ongoing environmental changes into a larger context and to further understand the complex Baltic Sea history and its impact on North Atlantic climate, we investigated a high accumulation-rate brackish-marine sediment core from the Little Belt (Site M0059), Danish Straits, NW Europe, retrieved during the Integrated Ocean Drilling Program (IODP) Expedition 347. We combined benthic foraminiferal geochemistry, faunal assemblages, and pore water stable isotopes to reconstruct seawater conditions (e.g., oxygenation, temperature, and salinity) over the past 7.7 thousand years (ka). Bottom water salinity in the Little Belt reconstructed from modeled pore water oxygen isotope data increased between 7.7 and 7.5 ka BP as a consequence of the transition from freshwater to brackish-marine conditions. Salinity decreased gradually (from 30 to 24) from 4.1 to ~2.5 ka BP. By using the trace elemental composition (Mg/Ca, Mn/Ca, and Ba/Ca) and stable carbon and oxygen isotopes of foraminiferal species Elphidium selseyensis and E. clavatum, we identified that generally warming and hypoxia occurred between about 7.5 and 3.3 ka BP, approximately coinciding in time with the Holocene Thermal Maximum (HTM). These changes of bottom water conditions were coupled to the North Atlantic Oscillation (NAO) and relative sea level change. ©2020. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159563
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作者单位: Department of Geology, Lund University, Lund, Sweden; Centre for Environmental and Climate Research, Lund University, Lund, Sweden; MARUM, Bremen University, Bremen, Germany; Helmholtz Centre for Polar and Marine Research, Alfred Wegener Institute, Potsdam, Germany; Palaeoceanography and Palaeoclimate Group, Interdisciplinary Centre for Climate Change (iClimate), Department of Geoscience, Aarhus University, Aarhus, Denmark; Geochemistry and Isotope Biogeochemistry Group, Leibniz Institute for Baltic Sea Research (IOW), Warnemünde, Germany; Marine Geochemistry, University of Greifswald, Greifswald, Germany; Interdisciplinary Faculty, Department of Maritime Systems, University of Rostock, Rostock, Germany; Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research, Section of Marine Geochemistry, Bremerhaven, Germany

Recommended Citation:
Ni S.,Quintana Krupinski N.B.,Groeneveld J.,et al. Holocene Hydrographic Variations From the Baltic-North Sea Transitional Area (IODP Site M0059)[J]. Paleoceanography and Paleoclimatology,2020-01-01,35(2)
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