Relative sea-level changes since 15000 cal.yr BP in the Nanortalik area, southern Greenland
We present new results for relative sea-level change for southern Greenland for the interval from 9000 cal. yr BP to the present. Together with earlier work from the same region this yields a nearly complete record from the time of deglaciation to the present. Isolation and/or transgression sequence...
Published in: | Journal of Quaternary Science |
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Online Access: | http://hdl.handle.net/1885/18674 https://doi.org/10.1002/jqs.940 https://openresearch-repository.anu.edu.au/bitstream/1885/18674/5/U4352516xPUB5%2bLambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/18674/7/01_Sparrenbom_Relative_sea-level_changes_2006.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/18674 2024-01-14T10:04:59+01:00 Relative sea-level changes since 15000 cal.yr BP in the Nanortalik area, southern Greenland Sparrenbom, Charlotte J. Bennike, Ole Bjorck, Svante Lambeck, Kurt http://hdl.handle.net/1885/18674 https://doi.org/10.1002/jqs.940 https://openresearch-repository.anu.edu.au/bitstream/1885/18674/5/U4352516xPUB5%2bLambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/18674/7/01_Sparrenbom_Relative_sea-level_changes_2006.pdf.jpg unknown Wiley-VCH Verlag GMBH 0267-8179 http://hdl.handle.net/1885/18674 doi:10.1002/jqs.940 https://openresearch-repository.anu.edu.au/bitstream/1885/18674/5/U4352516xPUB5%2bLambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/18674/7/01_Sparrenbom_Relative_sea-level_changes_2006.pdf.jpg Journal of Quaternary Science Keywords: Quaternary sea level change Arctic Greenland Nanortalik Greenland Holocene Isolation basin Lateglacial Sea level Journal article ftanucanberra https://doi.org/10.1002/jqs.940 2023-12-15T09:33:13Z We present new results for relative sea-level change for southern Greenland for the interval from 9000 cal. yr BP to the present. Together with earlier work from the same region this yields a nearly complete record from the time of deglaciation to the present. Isolation and/or transgression sequences in one lake and five tidal basins have been identified using lithostratigraphic analyses, sedimentary characteristics, magnetic susceptibility, saturated induced remanent magnetisation (SIRM), organic and carbonate content, and macrofossil analyses. AMS radiocarbon dating of macrofossils and bulk sediment samples provides the timescale. Relative sea level fell rapidly and reached present-day level at ∼ 9300 cal. yr BP and continued falling until at least 9000 cal. yr BP. Between 8000 and 6000 cal. yr BP sea level reached its lowest level of around ∼ 10 m below highest astronomical tide. At around 5000 cal. yr BP, sea level had reached above 7.8 m below highest astronomical tide and slowly continued to rise, not reaching present-day sea level until today. The isostatic rebound caused rapid isolation of the basins that are seen as distinct isolation contacts in the sediments. In contrast, the late Holocene transgressions are less well defined and occurred over longer time intervals. The late Holocene sea-level rise may be a consequence of isostatic reloading by advancing glaciers and/or an effect of the delayed response to isostatic rebound of the Laurentide ice sheet. One consequence of this transgression is that settlements of Palaeo-Eskimo cultures may be missing in southern Greenland. Article in Journal/Newspaper Arctic eskimo* Greenland Ice Sheet Magnetic susceptibility Nanortalik Australian National University: ANU Digital Collections Arctic Greenland Journal of Quaternary Science 21 1 29 48 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Quaternary sea level change Arctic Greenland Nanortalik Greenland Holocene Isolation basin Lateglacial Sea level |
spellingShingle |
Keywords: Quaternary sea level change Arctic Greenland Nanortalik Greenland Holocene Isolation basin Lateglacial Sea level Sparrenbom, Charlotte J. Bennike, Ole Bjorck, Svante Lambeck, Kurt Relative sea-level changes since 15000 cal.yr BP in the Nanortalik area, southern Greenland |
topic_facet |
Keywords: Quaternary sea level change Arctic Greenland Nanortalik Greenland Holocene Isolation basin Lateglacial Sea level |
description |
We present new results for relative sea-level change for southern Greenland for the interval from 9000 cal. yr BP to the present. Together with earlier work from the same region this yields a nearly complete record from the time of deglaciation to the present. Isolation and/or transgression sequences in one lake and five tidal basins have been identified using lithostratigraphic analyses, sedimentary characteristics, magnetic susceptibility, saturated induced remanent magnetisation (SIRM), organic and carbonate content, and macrofossil analyses. AMS radiocarbon dating of macrofossils and bulk sediment samples provides the timescale. Relative sea level fell rapidly and reached present-day level at ∼ 9300 cal. yr BP and continued falling until at least 9000 cal. yr BP. Between 8000 and 6000 cal. yr BP sea level reached its lowest level of around ∼ 10 m below highest astronomical tide. At around 5000 cal. yr BP, sea level had reached above 7.8 m below highest astronomical tide and slowly continued to rise, not reaching present-day sea level until today. The isostatic rebound caused rapid isolation of the basins that are seen as distinct isolation contacts in the sediments. In contrast, the late Holocene transgressions are less well defined and occurred over longer time intervals. The late Holocene sea-level rise may be a consequence of isostatic reloading by advancing glaciers and/or an effect of the delayed response to isostatic rebound of the Laurentide ice sheet. One consequence of this transgression is that settlements of Palaeo-Eskimo cultures may be missing in southern Greenland. |
format |
Article in Journal/Newspaper |
author |
Sparrenbom, Charlotte J. Bennike, Ole Bjorck, Svante Lambeck, Kurt |
author_facet |
Sparrenbom, Charlotte J. Bennike, Ole Bjorck, Svante Lambeck, Kurt |
author_sort |
Sparrenbom, Charlotte J. |
title |
Relative sea-level changes since 15000 cal.yr BP in the Nanortalik area, southern Greenland |
title_short |
Relative sea-level changes since 15000 cal.yr BP in the Nanortalik area, southern Greenland |
title_full |
Relative sea-level changes since 15000 cal.yr BP in the Nanortalik area, southern Greenland |
title_fullStr |
Relative sea-level changes since 15000 cal.yr BP in the Nanortalik area, southern Greenland |
title_full_unstemmed |
Relative sea-level changes since 15000 cal.yr BP in the Nanortalik area, southern Greenland |
title_sort |
relative sea-level changes since 15000 cal.yr bp in the nanortalik area, southern greenland |
publisher |
Wiley-VCH Verlag GMBH |
url |
http://hdl.handle.net/1885/18674 https://doi.org/10.1002/jqs.940 https://openresearch-repository.anu.edu.au/bitstream/1885/18674/5/U4352516xPUB5%2bLambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/18674/7/01_Sparrenbom_Relative_sea-level_changes_2006.pdf.jpg |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic eskimo* Greenland Ice Sheet Magnetic susceptibility Nanortalik |
genre_facet |
Arctic eskimo* Greenland Ice Sheet Magnetic susceptibility Nanortalik |
op_source |
Journal of Quaternary Science |
op_relation |
0267-8179 http://hdl.handle.net/1885/18674 doi:10.1002/jqs.940 https://openresearch-repository.anu.edu.au/bitstream/1885/18674/5/U4352516xPUB5%2bLambeck.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/18674/7/01_Sparrenbom_Relative_sea-level_changes_2006.pdf.jpg |
op_doi |
https://doi.org/10.1002/jqs.940 |
container_title |
Journal of Quaternary Science |
container_volume |
21 |
container_issue |
1 |
container_start_page |
29 |
op_container_end_page |
48 |
_version_ |
1788059412170014720 |