Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland
A lake sediment sequence from southern Store Koldewey, north-east Greenland, has been investigated using a multidisciplinary approach, including geophysical, geochemical, biogeochemical, biological and sedimentological methods. Chronological constraints are provided by accelerator mass spectrometry...
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Norwegian Polar Institute
2016
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ftdoajarticles:oai:doaj.org/article:c1570321b61644ffb4f645854cb4fd40 2023-05-15T15:13:22+02:00 Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland Martin Klug Ole Bennike Bernd Wagner 2016-12-01T00:00:00Z https://doi.org/10.3402/polar.v35.21912 https://doaj.org/article/c1570321b61644ffb4f645854cb4fd40 EN eng Norwegian Polar Institute http://www.polarresearch.net/index.php/polar/article/view/21912/50573 https://doaj.org/toc/1751-8369 1751-8369 doi:10.3402/polar.v35.21912 https://doaj.org/article/c1570321b61644ffb4f645854cb4fd40 Polar Research, Vol 35, Iss 0, Pp 1-14 (2016) North-east Greenland Greenland Ice Sheet Last Glacial Maximum deglaciation lake sediment Environmental sciences GE1-350 Oceanography GC1-1581 article 2016 ftdoajarticles https://doi.org/10.3402/polar.v35.21912 2022-12-30T21:44:59Z A lake sediment sequence from southern Store Koldewey, north-east Greenland, has been investigated using a multidisciplinary approach, including geophysical, geochemical, biogeochemical, biological and sedimentological methods. Chronological constraints are provided by accelerator mass spectrometry (AMS) 14C dating of bulk sediment and complemented with published water moss ages. The record consists of three major sediment units. Their individual structural, textural, geophysical and geochemical characteristics indicate variable input of sediment and meltwater due to variable proximity of the ice margin and therefore reflect the growth and decay of a local glacier during the late Weichselian. Radiocarbon dating of bulk sediment samples from the lowermost unit gave ages of 42 to 34 calibrated thousand years (cal Ky B.P.) and indicates that this material is redeposited in the lake basin during or after the ice advance at the end of the Pleistocene. Increased meltwater and sediment input from a retreating ice margin following the Younger Dryas is indicated by the occurrence of a sandy to gravely section. Fine-grained and laminated sediments were deposited during the Pleistocene–Holocene transition and indicate calm sedimentation conditions with an ice margin outside of the lake catchment. The reoccurrence of coarse sediments during the early Holocene may indicate increased meltwater input in response to the cold spell at about 9.3 Kya with increased snow accumulation rather than fluctuations of local glaciers. The dating results furthermore show that AMS 14C dating of bulk sediment samples deposited during glacier decay in High Arctic environments can give problematic ages. Article in Journal/Newspaper Arctic East Greenland glacier Greenland Ice Sheet Polar Research Store koldewey Directory of Open Access Journals: DOAJ Articles Arctic Greenland Kya ENVELOPE(8.308,8.308,63.772,63.772) Store Koldewey ENVELOPE(-18.820,-18.820,76.364,76.364) Polar Research 35 1 21912 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
North-east Greenland Greenland Ice Sheet Last Glacial Maximum deglaciation lake sediment Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
North-east Greenland Greenland Ice Sheet Last Glacial Maximum deglaciation lake sediment Environmental sciences GE1-350 Oceanography GC1-1581 Martin Klug Ole Bennike Bernd Wagner Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland |
topic_facet |
North-east Greenland Greenland Ice Sheet Last Glacial Maximum deglaciation lake sediment Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
A lake sediment sequence from southern Store Koldewey, north-east Greenland, has been investigated using a multidisciplinary approach, including geophysical, geochemical, biogeochemical, biological and sedimentological methods. Chronological constraints are provided by accelerator mass spectrometry (AMS) 14C dating of bulk sediment and complemented with published water moss ages. The record consists of three major sediment units. Their individual structural, textural, geophysical and geochemical characteristics indicate variable input of sediment and meltwater due to variable proximity of the ice margin and therefore reflect the growth and decay of a local glacier during the late Weichselian. Radiocarbon dating of bulk sediment samples from the lowermost unit gave ages of 42 to 34 calibrated thousand years (cal Ky B.P.) and indicates that this material is redeposited in the lake basin during or after the ice advance at the end of the Pleistocene. Increased meltwater and sediment input from a retreating ice margin following the Younger Dryas is indicated by the occurrence of a sandy to gravely section. Fine-grained and laminated sediments were deposited during the Pleistocene–Holocene transition and indicate calm sedimentation conditions with an ice margin outside of the lake catchment. The reoccurrence of coarse sediments during the early Holocene may indicate increased meltwater input in response to the cold spell at about 9.3 Kya with increased snow accumulation rather than fluctuations of local glaciers. The dating results furthermore show that AMS 14C dating of bulk sediment samples deposited during glacier decay in High Arctic environments can give problematic ages. |
format |
Article in Journal/Newspaper |
author |
Martin Klug Ole Bennike Bernd Wagner |
author_facet |
Martin Klug Ole Bennike Bernd Wagner |
author_sort |
Martin Klug |
title |
Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland |
title_short |
Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland |
title_full |
Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland |
title_fullStr |
Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland |
title_full_unstemmed |
Late Pleistocene to early Holocene environmental changes on Store Koldewey, coastal north-east Greenland |
title_sort |
late pleistocene to early holocene environmental changes on store koldewey, coastal north-east greenland |
publisher |
Norwegian Polar Institute |
publishDate |
2016 |
url |
https://doi.org/10.3402/polar.v35.21912 https://doaj.org/article/c1570321b61644ffb4f645854cb4fd40 |
long_lat |
ENVELOPE(8.308,8.308,63.772,63.772) ENVELOPE(-18.820,-18.820,76.364,76.364) |
geographic |
Arctic Greenland Kya Store Koldewey |
geographic_facet |
Arctic Greenland Kya Store Koldewey |
genre |
Arctic East Greenland glacier Greenland Ice Sheet Polar Research Store koldewey |
genre_facet |
Arctic East Greenland glacier Greenland Ice Sheet Polar Research Store koldewey |
op_source |
Polar Research, Vol 35, Iss 0, Pp 1-14 (2016) |
op_relation |
http://www.polarresearch.net/index.php/polar/article/view/21912/50573 https://doaj.org/toc/1751-8369 1751-8369 doi:10.3402/polar.v35.21912 https://doaj.org/article/c1570321b61644ffb4f645854cb4fd40 |
op_doi |
https://doi.org/10.3402/polar.v35.21912 |
container_title |
Polar Research |
container_volume |
35 |
container_issue |
1 |
container_start_page |
21912 |
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1766343928798248960 |