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  • 551.79  (1)
  • AGE; Age, maximum/old; Age, minimum/young; DEPTH, sediment/rock; GOS18_composite; Holocene; Lake Gościąż, Poland; lake sediments; late glacial; PCUWI; Piston corer, UWITEC; varve chronology  (1)
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  • 1
    facet.materialart.
    Unknown
    New insights into lake responses to rapid climate change: the Younger Dryas in Lake Gościąż, central Poland (2021)
    Details
    Publication Date: 2021-05-01
    Description: The sediment profile from Lake Gościąż in central Poland comprises a continuous, seasonally resolved and exceptionally well‐preserved archive of the Younger Dryas (YD) climate variation. This provides a unique opportunity for detailed investigation of lake system responses during periods of rapid climate cooling (YD onset) and warming (YD termination). The new varve record of Lake Gościąż presented here spans 1662 years from the late Allerød (AL) to the early Preboreal (PB). Microscopic varve counting provides an independent chronology with a YD duration of 1149+14/–22 years, which confirms previous results of 1140±40 years. We link stable oxygen isotopes and chironomid‐based air temperature reconstructions with the response of various geochemical and varve microfacies proxies especially focusing on the onset and termination of the YD. Cooling at the YD onset lasted ~180 years, which is about a century longer than the terminal warming that was completed in ~70 years. During the AL/YD transition, environmental proxy data lagged the onset of cooling by ~90 years and revealed an increase of lake productivity and internal lake re‐suspension as well as slightly higher detrital sediment input. In contrast, rapid warming and environmental changes during the YD/PB transition occurred simultaneously. However, initial changes such as declining diatom deposition and detrital input occurred already a few centuries before the rapid warming at the YD/PB transition. These environmental changes likely reflect a gradual increase in summer air temperatures already during the YD. Our data indicate complex and differing environmental responses to the major climate changes related to the YD, which involve different proxy sensitivities and threshold processes.
    Description: National Science Centre
    Description: Virtual Institute of Integrated Climate and Landscape Evolution Analysis (ICLEA)
    Keywords: 551.79 ; central Poland ; Younger Dryas ; sedimentation pattern ; lake sediments
    Type: article
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    CITATION GEO-LEO
  • 2
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    Unknown
    Varve chronology of core GOS18 from Lake Gościąż (2020)
    PANGAEA
    Details
    Publication Date: 2024-01-03
    Description: To revise the chronology for the Lake Gościąż record, sediment cores were retrieved during two field campaigns in 2015 and 2018. Four overlapping sections were collected using a UWITEC Piston Corer (Ø 90 mm) in the deepest part of Lake Gościąż, Poland (52.583022 N, 19.339946 E). The chronology was obtained by triple varve counting on petrographic thin sections that was complemented by 137Cs measurements and 14C AMS dating of terrestrial plant remains. Additionally, part of the chronology between 520-758 cm was obtained through age-depth modelling. Pollen analysis was performed for seventy one samples, prepared according to standard procedure, and analyzed in three intervals: i) from 1859.9 cm to 1874.4 cm with 2 cm resolution, ii) from 1880.2 cm to 1896.7 cm with 1-2 cm resolution and iii) from 1741.4 cm to 1798.4 cm with 0.5-3 cm resolution. The record is mostly varved and the bottom of the composite profile coincides with the onset of lacustrine sedimentation in the late Allerød at 12,834 +134/-233 varve yrs BP.
    Keywords: AGE; Age, maximum/old; Age, minimum/young; DEPTH, sediment/rock; GOS18_composite; Holocene; Lake Gościąż, Poland; lake sediments; late glacial; PCUWI; Piston corer, UWITEC; varve chronology
    Type: Dataset
    Format: text/tab-separated-values, 23182 data points
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    DATA PANGAEA
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