Last glacial maximum sediment record of the southern Weddell Sea shelf ...

• Main Authors: Hillenbrand, Claus-Dieter, Melles, Martin, Kuhn, Gerhard, Larter, Robert D
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Gravity corer; Piston corer; Giant box corer; Dredge; Gravity corer Kiel type; Multiboxcorer; IWSOE68; IWSOE69; IWSOE70; NARE77; NARE79; ANT-I/2; ANT-II/4; ANT-III/3; ANT-IV/3; ANT-V/4; ANT-VI/3; Glacier; Polarsirkel; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Antarc*; Antarctic; Ice Sheet; Ice Shelves; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.771774; https://doi.pangaea.de/10.1594/PANGAEA.771774

Abstract: The history of grounded ice-sheet extent on the southern Weddell Sea shelf during the Last Glacial Maximum (LGM) and the timing of post-LGM ice-sheet retreat are poorly constrained. Several glaciological models reconstructed widespread grounding and major thickening of the Antarctic Ice Sheet in the Weddell Sea sector at the LGM. In contrast, recently published onshore data and modelling results concluded only very limited LGM-thickening of glaciers and ice streams feeding into the modern Filchner and Ronne ice shelves. These studies concluded that during the LGM ice shelves rather than grounded ice covered the Filchner and Ronne troughs, two deep palaeo-ice stream troughs eroded into the southern Weddell Sea shelf.Here we review previously published and unpublished marine geophysical and geological data from the southern Weddell Sea shelf. The stratigraphy and geometry of reflectors in acoustic sub-bottom profiles are similar to those from other West Antarctic palaeo-ice stream troughs, where ... : Supplement to: Hillenbrand, Claus-Dieter; Melles, Martin; Kuhn, Gerhard; Larter, Robert D (2012): Marine geological constraints for the grounding-line position of the Antarctic Ice Sheet on the southern Weddell Sea shelf at the Last Glacial Maximum. Quaternary Science Reviews, 32, 25-47 ...