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Biskaborn, Boris K; Subetto, Dmitry A; Savelieva, Larissa A; Vakhrameeva, Polina; Hansche, Andreas; Herzschuh, Ulrike; Klemm, Juliane; Heinecke, Liv; Pestryakova, Luidmila A; Meyer, Hanno; Kuhn, Gerhard; Diekmann, Bernhard (2016): Profiles of diatoms, pollen, XRD, XRF and organic composition of two sediment cores (PG2022 and PG2023) from Lake Kyutyunda in Yakutia, NE Siberia, Russia [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.848906, Supplement to: Biskaborn, BK et al. (2016): Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability. Quaternary Science Reviews, 147, 406-421, https://doi.org/10.1016/j.quascirev.2015.08.014

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Abstract:
Although the climate development over the Holocene in the Northern Hemisphere is well known, palaeolimnological climate reconstructions reveal spatiotemporal variability in northern Eurasia. Here we present a multi-proxy study from north-eastern Siberia combining sediment geochemistry, and diatom and pollen data from lake-sediment cores covering the last 38,000 cal. years. Our results show major changes in pyrite content and fragilarioid diatom species distributions, indicating prolonged seasonal lake-ice cover between ~13,500 and ~8,900 cal. years BP and possibly during the 8,200 cal. years BP cold event. A pollen-based climate reconstruction generated a mean July temperature of 17.8°C during the Holocene Thermal Maximum (HTM) between ~8,900 and ~4,500 cal. years BP. Naviculoid diatoms appear in the late Holocene indicating a shortening of the seasonal ice cover that continues today. Our results reveal a strong correlation between the applied terrestrial and aquatic indicators and natural seasonal climate dynamics in the Holocene. Planktonic diatoms show a strong response to changes in the lake ecosystem due to recent climate warming in the Anthropocene.
We assess other palaeolimnological studies to infer the spatiotemporal pattern of the HTM and affirm that the timing of its onset, a difference of up to 3,000 years from north to south, can be well explained by climatic teleconnections. The westerlies brought cold air to this part of Siberia until the Laurentide ice-sheet vanished 7,000 years ago. The apparent delayed ending of the HTM in the central Siberian record can be ascribed to the exceedance of ecological thresholds trailing behind increases in winter temperatures and decreases in contrast in insolation between seasons during the mid to late Holocene as well as lacking differentiation between summer and winter trends in paleolimnological reconstructions.
Keyword(s):
SibLake
Project(s):
Permafrost Research (Periglacial Dynamics) @ AWI (AWI_PerDyn)
Coverage:
Median Latitude: 69.628407 * Median Longitude: 123.649367 * South-bound Latitude: 69.628370 * West-bound Longitude: 123.648130 * North-bound Latitude: 69.628520 * East-bound Longitude: 123.649780
Date/Time Start: 2010-08-18T00:00:00 * Date/Time End: 2010-08-20T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
12 datasets

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Datasets listed in this publication series

  1. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Loss-on-ignition analysis on composite core PG2022. https://doi.org/10.1594/PANGAEA.848895
  2. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Pollen profile of composite core PG2022. https://doi.org/10.1594/PANGAEA.848896
  3. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Radiocarbon age determination on sediment core PG2022-1. https://doi.org/10.1594/PANGAEA.848894
  4. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Diatom indices and sedimentation rate of composite core PG2023. https://doi.org/10.1594/PANGAEA.848899
  5. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Diatoms of composite core PG2023. https://doi.org/10.1594/PANGAEA.848898
  6. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Geochemistry of composite core PG2023. https://doi.org/10.1594/PANGAEA.848905
  7. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Mineral composition of composite core PG2023. https://doi.org/10.1594/PANGAEA.848900
  8. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Stable isotope record of composite core PG2023. https://doi.org/10.1594/PANGAEA.848904
  9. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Total organic carbon and total nitrogen of composite core PG2023. https://doi.org/10.1594/PANGAEA.848902
  10. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Water content of composite core PG2023. https://doi.org/10.1594/PANGAEA.848903
  11. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): X-ray fluorescence measurements on composite core PG2023. https://doi.org/10.1594/PANGAEA.848901
  12. Biskaborn, BK; Subetto, DA; Savelieva, LA et al. (2016): Radiocarbon age determination on composite core PG2023. https://doi.org/10.1594/PANGAEA.848897