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Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43904229" target="_blank" >RIV/60076658:12310/21:43904229 - isvavai.cz</a>

  • Alternative codes found

    RIV/44555601:13520/20:43895642 RIV/60460709:41210/21:82424 RIV/00216224:14310/21:00120914 RIV/00216208:11310/21:10422158

  • Result on the web

    <a href="https://onlinelibrary.wiley.com/doi/10.1111/bor.12483" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1111/bor.12483</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1111/bor.12483" target="_blank" >10.1111/bor.12483</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years

  • Original language description

    The Arctic, one of the most sensitive components of the Earth&apos;s climate system, experienced pronounced climatic fluctuations during the Late Holocene. In order to obtain a detailed record of past environmental and climatic variability, sedimentary cores from two interconnected infilled depositional basins in the Kobbefjord area, southwestern Greenland, were retrieved and subjected to a multi-proxy investigation. The absolute chronostratigraphy was established through radiocarbon (C-14) and short-lived radioisotope (Pb-210, Cs-137) dating. We also analysed magnetic susceptibility, grain size, X-ray fluorescence element composition, total content of carbon, nitrogen and sulphur, biogenic silica and diatom assemblages. The palaeoenvironmental reconstruction presented from the upper basin records similar to 800 years of sedimentation in a former shallow Arctic lake/pond that was modulated by catchment processes and regional hydroclimate. The record is dominated by alternating periods of increased organic and clastic deposition, suggesting warmer/drier and colder/wetter climate, respectively. Comparison of our records with other proxy-based lacustrine, marine and glacier records and instrumental measurements from Greenland and the North Atlantic reveals common climatic trends, consistent with the inferred North Atlantic Oscillation pattern. Periods at similar to 800-600, similar to 320-220 and similar to 140-30 cal. a BP correspond to the main cold phases. The earliest climatic deterioration coincides with the demise of the nearby Norse Western Settlement. The most recent cold period represents the culmination of the Little Ice Age with the maximum Holocene advances of Greenland glaciers. Ameliorated conditions predominated at similar to 550-320 and similar to 220-140 cal. a BP. The evolution of both water bodies is concluded by transition into oligotrophic peat bogs after complete infilling of the basins at similar to 30 cal. a BP. Despite differences in proxy signals between the coring sites, this study endorses the usefulness of shallow lake/pond sediments from infilled basins for environmental reconstructions, as long as local depositional processes do not mask the external driving factors.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10508 - Physical geography

Result continuities

  • Project

    <a href="/en/project/LM2015078" target="_blank" >LM2015078: Czech Polar Research Infrastructure</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Boreas

  • ISSN

    0300-9483

  • e-ISSN

  • Volume of the periodical

    50

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    17

  • Pages from-to

    262-278

  • UT code for WoS article

    000587342500001

  • EID of the result in the Scopus database

    2-s2.0-85096775955