(Table 2) Radiocarbon dates from lakes on Fildes Peninsula, King George Island ...

• Main Authors: Watcham, Emma P, Bentley, Michael J, Hodgson, Dominic A, Roberts, Stephen J, Fretwell, Peter, Lloyd, Jerry M, Larter, Robert D, Whitehouse, Pippa L, Leng, Melanie J, Monien, Patrick, Moreton, Steven Grahame
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Event label; Latitude of event; Longitude of event; Comment of event; Sample ID; Age, dated material; Laboratory; Age, dated; Age, dated standard deviation; δ13C; Calendar age, minimum/young; Calendar age, maximum/old; Probability; Calendar age; Core; Age, AMS 14C conventional; Age, 14C milieu/reservoir corrected Milliken et al., 2009; Age, 14C calibrated, CALIB Stuiver & Reimer, 1993; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Antarctic Peninsula; Ice Sheet; King George Island; Sea ice; South Shetland Islands
• Online Access: https://dx.doi.org/10.1594/pangaea.859024; https://doi.pangaea.de/10.1594/PANGAEA.859024

Precise relative sea level (RSL) data are important for inferring regional ice sheet histories, as well as helping to validate numerical models of ice sheet evolution and glacial isostatic adjustment. Here we develop a new RSL curve for Fildes Peninsula, South Shetland Islands (SSIs), a sub-Antarctic archipelago peripheral to the northern Antarctic Peninsula ice sheet, by integrating sedimentary evidence from isolation basins with geomorphological evidence from raised beaches. This combined approach yields not only a Holocene RSL curve, but also the spatial pattern of how RSL change varied across the archipelago. The curve shows a mid-Holocene RSL highstand on Fildes Peninsula at 15.5 m above mean sea level between 8000 and 7000 cal a BP. Subsequently RSL gradually fell as a consequence of isostatic uplift in response to regional deglaciation. We propose that isostatic uplift occurred at a non-steady rate, with a temporary pause in ice retreat ca. 7200 cal a BP, leading to a short-lived RSL rise of ~1 m and ... : 14C ages have been normalized to -25 per mil PDB d13C using the d13C values shown.Dates on marine bulk sediment have been corrected using a local marine reservoir correction of 1064 ± 10 years (Milliken et al., 2009); errors on the original date and DR value were combined in quadrature. Sediments were interpreted as being of marine origin on the basis of diatom analysis, as d13C values are too wide ranging to allow discrimination of marine and freshwater sediments.Dates were calibrated using Calib (version 5.0.1, Stuiver and Reimer, 1993) using the SHCal04 calibration curve for terrestrial dates (McCormac et al., 2004) and the Marine04 calibration curve for marine dates (Hughen et al., 2004) with a DR value of 664 years (marine reservoir correction of 1064 years minus the global ocean reservoir correction of 400 years, Stuiver and Braziunas, 1993; Reimer, 2009, http://www.calib.qub.ac.uk/marine/). Where more than one calibrated range is given, the relative percentage area under the probability distribution ...