Diatom assemblages of Holocene sediments in Neny Fjord, Antarctic Peninsula

• Main Authors: Allen, Claire Susannah, Oakes-Fretwell, Lisa, Anderson, John, Hodgson, Dominic A
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Antarctic Peninsula; Climate change; diatoms; Holocene; Meltwater; Palaeoceanography; sea-ice; tidewater outlet glaciers; Antarctic; The Antarctic; Marguerite; Marguerite Bay; Neny; Neny Fjord; Antarc*; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.931918; https://doi.org/10.1594/PANGAEA.931918

Diatom abundance and assemblage data are presented for JPC43 - a ~12 m marine sediment core recovered from 576 m water depth in Neny Fjord, Marguerite Bay, Antarctic Peninsula (68.2571°S, 66.9617°W). The core was collected aboard the RVIB Nathanial B Palmer in 2002 during the NBP0201 scientific cruise (PI: Prof J B Anderson) to determine the timing of deglaciation in the fjords of the Antarctic Peninsula. The core record spans the Holocene with samples dated using an age model based on 5 reliable radiocarbon dates. Diatom concentrations and the contribution of Chaetoceros resting spores (CRS %) are calculated from counts (mean=474.4 valves) of the whole diatom assemblage - 'total counts' (n=81); relative abundance of all other diatom taxa are based on counts (mean=363.1 valves) excluding CRS - 'CRS-free counts' (n=66). The relevant methods are described and referenced in the associated publication (Allen et al. 2010).