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Diekmann, Bernhard; Fütterer, Dieter K; Grobe, Hannes; Hillenbrand, Claus-Dieter; Kuhn, Gerhard; Michels, Klaus; Petschick, Rainer; Pirrung, Michael (2003): Ice rafted debris distribution in 16 sediment cores from the South Atlantic. PANGAEA, https://doi.org/10.1594/PANGAEA.732965, Supplement to: Diekmann, B et al. (2004): Terrigenous sediment supply in the polar to temperate South Atlantic: land-ocean links of environmental changes during the late Quaternary. In: Wefer, G; Mulitza, S & Ratmeyer, V (eds.), The South Atlantic in the Late Quaternary: Reconstruction of Material Budget and Current Systems. Springer-Verlag, Berlin, Heidelberg, New York, 375-399, hdl:10013/epic.15597.d001

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Abstract:
Terrigenous sediment parameters in modern sea-bottom samples and sediment cores of the South Atlantic are used to infer variations in detrital sources and modes of terrigenous sediment supply in response to environmental changes through the late Quaternary climate cycles. Massaccumulation rates of terrigenous sediment and fluxes of ice-rafted detritus are discussed in terms of temporal variations in detrital sediment input from land to sea. Grain-size parameters ofterrigenous mud document the intensity of bottom-water circulation, whereas clay-mineral assemblages constrain the sources and marine transport routes of suspended fine-grained particulates, controlled by the modes of sediment input and patterns of ocean circulation. The results suggest low-frequency East Antarctic ice dynamics with dominant 100-kyr cycles and high rates of Antarctic Bottom Water formation and iceberg discharge during interglacial times. In contrast, the more subpolar ice masses of the Antarctic Peninsula also respond to short-term climate variability with maximum iceberg discharges during glacial terminations related to the rapid disintegration of advanced ice masses. In the northern Scotia Sea, increased sediment supply from southern South America points to extended ice masses in Patagonia during glacial times. In the southeastern South Atlantic, changes in regional ocean circulation are linked to global thermohaline ocean circulation and are in phase with northern-hemispheric processes of ice build-up and associated formation of North Atlantic Deep Water, which decreased during glacial times and permitted a wider extension of southern-source water masses in the study area.
Related to:
Diekmann, Bernhard; Kuhn, Gerhard; Rachold, Volker; Abelmann, Andrea; Brathauer, Uta; Fütterer, Dieter K; Gersonde, Rainer; Grobe, Hannes (2000): Terrigenous sediment supply in the Scotia Sea (Southern Ocean): response to Late Quaternary ice dynamics in Patagonia and on the Antarctic Peninsula. Palaeogeography, Palaeoclimatology, Palaeoecology, 162(3-4), 357-387, https://doi.org/10.1016/S0031-0182(00)00138-3
Grobe, Hannes; Fütterer, Dieter K; Hubberten, Hans-Wolfgang; Kuhn, Gerhard; Mackensen, Andreas (1993): Zur Entwicklung der spätquartären Sedimentfazies im Südpolarmeer. Zeitschrift der Deutschen Geologischen Gesellschaft, 144, 330-351, hdl:10013/epic.11663.d001
Coverage:
Median Latitude: -50.974008 * Median Longitude: -4.281948 * South-bound Latitude: -67.065330 * West-bound Longitude: -45.291660 * North-bound Latitude: -41.275000 * East-bound Longitude: 37.480500
Date/Time Start: 1987-12-26T13:05:00 * Date/Time End: 1994-04-05T10:38:00
Event(s):
PS1575-1 (PS12/248) * Latitude: -62.849500 * Longitude: -43.335500 * Date/Time: 1987-12-26T13:05:00 * Elevation: -3461.0 m * Penetration: 10.7 m * Recovery: 8.51 m * Location: South Orkney * Campaign: ANT-VI/3 (PS12) * Basis: Polarstern * Device: Gravity corer (Kiel type) (SL) * Comment: 9 core sections: 0-0.57, 0.57-1.57, 1.57-2.57, 2.57-3.57, 3.57-4.51, 4.51-5.51, 5.51-6.51, 6.51-7.51, 7.51-8.51 m
PS1752-1 (PS16/271) * Latitude: -45.623330 * Longitude: 9.600000 * Date/Time: 1989-11-05T20:35:00 * Elevation: -4555.0 m * Penetration: 10 m * Recovery: 8.44 m * Location: Agulhas Basin * Campaign: ANT-VIII/3 (PS16) * Basis: Polarstern * Device: Gravity corer (Kiel type) (SL) * Comment: 9 core sections: 0-0.56, 0.56-1.56, 1.56-2.56, 2.56-3.56, 3.56-4.56, 4.56-5.56, 5.56-6.56, 6.56-7.56, 7.56-8.44 m
PS1754-1 (PS16/278) * Latitude: -46.771000 * Longitude: 7.612330 * Date/Time: 1989-11-06T15:58:00 * Elevation: -2519.0 m * Recovery: 3.52 m * Location: Meteor Rise * Campaign: ANT-VIII/3 (PS16) * Basis: Polarstern * Device: Gravity corer (Kiel type) (SL) * Comment: 4 core sections: 0-0.52, 0.52-1.52, 1.52-2.52, 2.52-3.52 m
Size:
16 datasets

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