Data Description

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Citation:
Grobe, H et al. (1993): Documentation of sediment core PS1392-1. Alfred Wegener Institute, Bremerhaven - Polarstern core repository, doi:10.1594/PANGAEA.107850,
Supplement to: Grobe, Hannes; Huybrechts, Philippe; Fütterer, Dieter K (1993): Late Quarternary record of sea level changes in the Antarctic. Geologische Rundschau, 82(2), 263-275, doi:10.1007/BF00191832
Abstract:
The Late Quaternary sediment sequence of the continental margin in the eastern Weddell Sea is well suited for palaeoenvironmental reconstructions. Two cores from the upper slope, which contain the sedimentary record of the last 300 ky, have been sedimentologically investigated. Age models are based on lithostratigraphy and are correlated with the stable isotope record. As a result of a detailed analysis of the clay mineral composition, grain size distributions and structures, this sedimentary record provides the first marine evidence that the Antarctic ice sheet extended to the shelf edge during the last glacial.
The variations in volume and size of the ice sheet were also simulated in numerical models. Changes in accumulation rate and ice temperature are of some importance, but the model revealed that fluctuations are primarily driven by changes in eustatic sea-level and that the ice edge extended to the shelf edge during the last glacial maximum. This causal relationship implies that the maximum ice extension strongly depends on the magnitude and duration of the sea-level depression during a glacial period. The results of the sedimentological investigations and of the numerical models show that the Antarctic ice sheet follows glacial events in the northern hemisphere by teleconnections of sea level.
Related to:
Fütterer, Dieter K (1987): Die Expedition ANTARKTIS-IV mit FS Polarstern 1985/1986, Bericht von den Fahrtabschnitten ANT-IV/3-4 (The Expedition ANTARKTIS-IV of RV POLARSTERN 1985/86 Report of Legs ANT-IV/3-4). Berichte zur Polarforschung = Reports on Polar Research, 33, 204 pp, doi:10.2312/BzP_0033_1987 *
Grobe, Hannes; Mackensen, Andreas (1992): Late Quaternary climatic cycles as recorded in sediments from the Antarctic continental margin. In: Kennett, James P & Warnke, Detlef A (eds.), The Antarctic Paleoenvironment: a perspective on Global Change, Antarctic Research Series, American Geophysical Union, DOI:10.1029/AR056p0349, 56, 349-376, hdl:10013/epic.11662.d001 *
Other version:
Grobe, Hannes; Huybrechts, Philippe; Fütterer, Dieter K (1993): Late Quaternary record of sea-level changes in the Antarctic. Geologische Rundschau, 82(2), 263-275, hdl:10013/epic.11664 *
Further details:
Project(s):
Coverage:
Latitude: -70.196700 * Longitude: -6.725000
Event(s):
PS1392-1 (PS08/371) * * Latitude: -70.196667 * Longitude: -6.725000 * Date/Time: 1985-12-30T06:52:00 * Elevation: -1794.0 m * Recovery: 6.30 m * Penetration: 8.40 m * Location: Atka Bay * * Campaign: ANT-IV/3 (PS08) * * Basis: Polarstern * * Device: Gravity corer (Kiel type) *
License:
Size:
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