Sea ice and wind variability during the Holocene in East Antarctica ...

• Main Authors: Barbara, Loïc, Crosta, Xavier, Massé, Guillaume, Ther, Olivier
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2010
• Subjects: Jumbo Piston Core; Antarc*; Antarctica; East Antarctica; Ice Sheet; Ice Shelf; Prydz Bay; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.810139; https://doi.pangaea.de/10.1594/PANGAEA.810139

A high-resolution continuous record of diatom census counts and diatom specific biomarkers in sediment core NBP0101-JPC24 allows assessment of oceanographic and environmental conditions in eastern Prydz Bay during the deglaciation (11 100-9000 cal yr BP) at decadal timescale. Our study improves previous snapshots investigations based on resin-embedded thin sections and presents a new proxy that compliments the diatom census counts. Our results suggest that the ice sheet retreat over the core site is dated at ~11 100 cal yr BP, setting the onset of local deglaciation and subsequent open marine conditions. The glacial retreat in Prydz Bay is due to global warming initiated at 18 cal ka BP and the regional development of the Prydz Bay cyclonic gyre. Our results further demonstrate that the deglaciation in eastern Prydz Bay can be separated in four phases: the first between 11 100 and 10 900 cal yr BP when the ice shelf was proximal and sea ice was almost perennial; the second and the third phases between 10 ... : Supplement to: Barbara, Loïc; Crosta, Xavier; Massé, Guillaume; Ther, Olivier (2010): Deglacial environments in eastern Prydz Bay, East Antarctica. Quaternary Science Reviews, 29, 2731-2740 ...