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Xiao, Xiaotong; Stein, Ruediger; Fahl, Kirsten (2015): Temporal and spatial LGM variability of biomarker records in the Arctic Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.845021, Supplement to: Xiao, X et al. (2015): MIS 3 to MIS 1 temporal and LGM spatial variability in Central Arctic Ocean sea-ice cover: Reconstruction from biomarkers. Paleoceanography, 30(7), 969-983, https://doi.org/10.1002/2015PA002814

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Abstract:
Using the sea ice proxy IP25 and phytoplankton-derived biomarkers (brassicasterol and dinosterol) Arctic sea-ice conditions were reconstructed for Marine Isotope Stage (MIS) 3 to 1 in sediment cores from the north of Barents Sea continental margin across the Central Arctic to the Southern Mendeleev Ridge. Our results suggest more extensive sea-ice cover than present-day during MIS 3, increasing sea-ice growth during MIS 2 and decreased sea-ice cover during the last deglacial. The summer ice edge sustained north of the Barents Sea even during extremely cold (i.e., Last Glacial Maximum (LGM)) as well as warm periods (i.e., Bølling-Allerød). During the LGM, the western Svalbard margin and the northern Barents Sea margin areas were characterized by high concentrations of both IP25 and phytoplankton biomarkers, interpreted as a productive ice-edge situation, caused by the inflow of warm Atlantic Water. In contrast, the LGM high Arctic proper (north of 84°N) was covered by thick permanent sea ice throughout the year with rare break up, indicated by zero or near-zero biomarker concentrations. The spring/summer sea-ice margin significantly extended southwards to the southern Lomonosov Ridge and Mendeleev Ridge during the LGM. Our proxy reconstructions are very consistent with published model results based on the North Atlantic/Arctic Ocean Sea Ice Model (NAOSIM).
Project(s):
Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)
Coverage:
Median Latitude: 83.662406 * Median Longitude: 150.519638 * South-bound Latitude: 77.603800 * West-bound Longitude: 2.381667 * North-bound Latitude: 89.000000 * East-bound Longitude: -2.556800
Date/Time Start: 1991-07-18T21:03:00 * Date/Time End: 2008-09-24T00:33:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
8 datasets

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Datasets listed in this publication series

  1. Xiao, X; Stein, R; Fahl, K (2015): Biomarker distributions at the Last Glacial Maximum (LGM). https://doi.org/10.1594/PANGAEA.845020
  2. Xiao, X; Stein, R; Fahl, K (2015): Biomarker distributions in sediment core PS72/340-5. https://doi.org/10.1594/PANGAEA.845018
  3. Xiao, X; Stein, R; Fahl, K (2015): Biomarker distributions in sediment core PS72/410-2. https://doi.org/10.1594/PANGAEA.845019
  4. Xiao, X; Stein, R; Fahl, K (2015): Biomarker distributions in sediment core PS2163-1. https://doi.org/10.1594/PANGAEA.845012
  5. Xiao, X; Stein, R; Fahl, K (2015): Biomarker distributions in sediment core PS2170-4. https://doi.org/10.1594/PANGAEA.845014
  6. Xiao, X; Stein, R; Fahl, K (2015): Biomarker distributions in sediment core PS2185-4. https://doi.org/10.1594/PANGAEA.845015
  7. Xiao, X; Stein, R; Fahl, K (2015): Biomarker distributions in sediment core PS2206-4. https://doi.org/10.1594/PANGAEA.845016
  8. Xiao, X; Stein, R; Fahl, K (2015): Biomarker distributions in sediment core PS2446-4. https://doi.org/10.1594/PANGAEA.845017