Diatom and hydrocarbon analysis of sediment core NBP00-03-JPC38 ...

• Main Authors: Barbara, Loïc, Crosta, Xavier, Leventer, Amy, Schmidt, S, Etourneau, Johan, Domack, Eugene W, Massé, Guillaume
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2016
• Subjects: Piston corer; NBP0003; Nathaniel B. Palmer; Antarctic; Antarctic Peninsula; Weddell; Guillaume; Palmer Deep; Antarc*; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.858524; https://doi.pangaea.de/10.1594/PANGAEA.858524

In this study, we present a unique high-resolution Holocene record of oceanographic and climatic change based on analyses of diatom assemblages combined with biomarker data from a sediment core collected from the Vega Drift, eastern Antarctic Peninsula (EAP). These data add to the climate framework already established by high-resolution marine sedimentary records from the Palmer Deep, western Antarctic Peninsula (WAP). Heavy sea ice conditions and reduced primary productivity were observed prior to 7.4 ka B.P. in relation with the proximity of the glacial ice melt and calving. Subsequent Holocene oceanographic conditions were controlled by the interactions between the Westerlies-Antarctic Circumpolar Current (ACC)-Weddell Gyre dynamics. A warm period characterized by short seasonal sea ice duration associated with a southern shift of both ACC and Westerlies field persisted until 5 ka B.P. This warm episode was then followed by climate deterioration during the middle-to-late Holocene (5 to 1.9 ka B.P.) with a ... : Supplement to: Barbara, Loïc; Crosta, Xavier; Leventer, Amy; Schmidt, S; Etourneau, Johan; Domack, Eugene W; Massé, Guillaume (2016): Environmental responses of the Northeast Antarctic Peninsula to the Holocene climate variability. Paleoceanography, 31(1), 131-147 ...