10.1594/PANGAEA.732965
Diekmann, Bernhard
Bernhard
Diekmann
0000-0001-5129-3649
Fütterer, Dieter K
Dieter K
Fütterer
Grobe, Hannes
Hannes
Grobe
0000-0002-4133-2218
Hillenbrand, Claus-Dieter
Claus-Dieter
Hillenbrand
0000-0003-0240-7317
Kuhn, Gerhard
Gerhard
Kuhn
0000-0001-6069-7485
Michels, Klaus
Klaus
Michels
Petschick, Rainer
Rainer
Petschick
Pirrung, Michael
Michael
Pirrung
Ice rafted debris distribution in 16 sediment cores from the South Atlantic
PANGAEA
2003
Gravity corer (Kiel type)
MultiCorer
Piston corer (BGR type)
ANT-VI/3
ANT-VIII/3
ANT-VIII/6
ANT-IX/4
ANT-X/5
ANT-XI/2
ANT-XI/4
Polarstern
Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)
1987-12-26T13:05:00/1994-04-05T10:38:00
Supplementary Publication Series of Datasets
10013/epic.15597.d001
10.1016/S0031-0182(00)00138-3
10013/epic.11663.d001
16 datasets
application/zip
Creative Commons Attribution 3.0 Unported
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.
Supplement to: Diekmann, Bernhard; Fütterer, Dieter K; Grobe, Hannes; Hillenbrand, Claus-Dieter; Kuhn, Gerhard; Michels, Klaus; Petschick, Rainer; Pirrung, Michael (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
-45.29166
37.4805
-67.06533
-41.275
South Orkney
Agulhas Basin
Meteor Rise
Shona Ridge
Atlantic Ridge
Lazarev Sea
South Atlantic Ocean
Scotia Sea
South Atlantic
Scotia Sea, southwest Atlantic