The biomarker and bulk parameters of two sediment cores along Baffin Bay-Labrador Sea north-south transect during the Holocene ...

• Main Authors: Saini, Jeetendra, Stein, Ruediger, Fahl, Kirsten, Weiser, Jens, Hebbeln, Dierk, Madaj, Lina
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2021
• Subjects: Baffin Bay; HBI III; Holocene; IP25; Labrador Sea; PIP25 index; Sea ice; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic ArcTrain; Arctic; Greenland; Baffin; Climate change; North Atlantic; Phytoplankton
• Online Access: https://dx.doi.org/10.1594/pangaea.939206; https://doi.pangaea.de/10.1594/PANGAEA.939206

Holocene sea ice and palaeoenvironmental conditions were reconstructed using three sediment cores from northeastern Baffin Bay (GeoB19948-3 and GeoB19927-3) and the Labrador Sea (GeoB19905-1) along a north-south transect based on sea ice IP25 and open-water phytoplankton biomarkers (brassicasterol, dinosterol and HBI III). In Baffin Bay, sea-surface conditions in the Early Holocene were characterized by extended (early) spring sea ice cover (SIC) prior to 7.6 ka BP. The conditions in the NE Labrador Sea, however, remained predominantly ice-free in spring/autumn due to the enhanced influx of Atlantic Water (i.e., WGC; West Greenland Current) from 11.5 to ~9.1 ka BP, succeeded by a period of continued (spring-autumn) ice-free conditions from 9.1 to 7.6 ka BP corresponding to the onset of Holocene Thermal Maximum (HTM)-like conditions. A transition towards reoccurring ice-edge and significantly reduced SIC conditions in Baffin Bay is evident in the Mid Holocene (~7.6-3 ka BP) probably caused by the variations ...