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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F20%3A43895642" target="_blank" >RIV/44555601:13520/20:43895642 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/21:43904229 RIV/00216208:11310/21:10422158 RIV/60460709:41210/21:82424 RIV/00216224:14310/21:00120914

Result on the web

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

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 (14C) and short-lived radioisotope (210Pb, 137Cs) 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 ~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 ~800-600, ~320-220 and ~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 ~550-320 and ~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 ~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

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

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

NO - NORWAY

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