Changes in climate, ocean and ice-sheet conditions in the Ross embayment, Antarctica, at 6 ka

• DOI: 10.3189/1998aog27-1-305-310
• Publication Date: 2017-11-02T10:45:54Z
• Authors: Eric J. Steig; Charles P. Hart; James W. C. White; Wendy L. Cunningham; Mathew D. Davis; Eric S. Saltzman
• Keywords: Ice core; Antarctic ice sheet; Dome (geology)

Evidence from the Ross embayment, Antarctica, suggests an abrupt cooling and a concomitant increase in sea-ice cover at about 6000 BP (6 ka). Stable-isotope (δD) concentrations Taylor Dome ice core, western edge of decline rapidly after 6 ka, continue to through late Holocene. Methanesulfonic acid show opposite trends δD Sediment cores Sea percentage minimum for diatom Fragilariopsis curta between 9 whenTaylor values are highest, followed by Radiocarbon dates raised beach deposits indicate that retreat shelves embayment ceased coincident with environmental changes inferred sediment ice-core records. The similarity timing important role climate controlling evolution ice-shelf margins following end last glaciation.