Postglacial variability in near‐bottom current speed on the continental shelf off south‐west Spitsbergen
ABSTRACT This study documents changes in the sedimentary environment on the outer continental shelf off south‐west Spitsbergen during the last ∼14 000 cal a BP using sedimentological, mineralogical and geochemical data from a sea‐bed sediment core. We use the sortable silt fraction to infer fluctuat...
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crwiley:10.1002/jqs.2748 2024-09-09T19:25:27+00:00 Postglacial variability in near‐bottom current speed on the continental shelf off south‐west Spitsbergen STERNAL, BEATA SZCZUCISKI, WITOLD FORWICK, MATTHIAS ZAJĄCZKOWSKI, MAREK LORENC, STANISŁAW PRZYTARSKA, JOANNA Polish National Science Center 2014 http://dx.doi.org/10.1002/jqs.2748 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2748 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2748 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 29, issue 8, page 767-777 ISSN 0267-8179 1099-1417 journal-article 2014 crwiley https://doi.org/10.1002/jqs.2748 2024-06-18T04:15:28Z ABSTRACT This study documents changes in the sedimentary environment on the outer continental shelf off south‐west Spitsbergen during the last ∼14 000 cal a BP using sedimentological, mineralogical and geochemical data from a sea‐bed sediment core. We use the sortable silt fraction to infer fluctuations of near‐bottom current speed and determine sediment provenance and sediment transport paths. For most of the record length, sediments were derived from distal sources by the West Spitsbergen Current (WSC) and the East Spitsbergen Current (ESC). However, before ∼12 000 and after ∼1800 cal a BP sediments were also sourced from proximal sources in south‐west Spitsbergen. The slowest near‐bottom currents were recorded between 10 300 and 9700 cal a BP when an increase in water stratification occurred, probably due to the strengthening of the ESC and an associated reduction in the northward water and heat flux. Near‐bottom currents related to WSC activity were at their maximum between 9000 and 7500 cal a BP, i.e. during a period of elevated water temperature, probably resulting in maximum relative heat fluxes to the Arctic. Article in Journal/Newspaper Arctic Spitsbergen Wiley Online Library Arctic Journal of Quaternary Science 29 8 767 777 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT This study documents changes in the sedimentary environment on the outer continental shelf off south‐west Spitsbergen during the last ∼14 000 cal a BP using sedimentological, mineralogical and geochemical data from a sea‐bed sediment core. We use the sortable silt fraction to infer fluctuations of near‐bottom current speed and determine sediment provenance and sediment transport paths. For most of the record length, sediments were derived from distal sources by the West Spitsbergen Current (WSC) and the East Spitsbergen Current (ESC). However, before ∼12 000 and after ∼1800 cal a BP sediments were also sourced from proximal sources in south‐west Spitsbergen. The slowest near‐bottom currents were recorded between 10 300 and 9700 cal a BP when an increase in water stratification occurred, probably due to the strengthening of the ESC and an associated reduction in the northward water and heat flux. Near‐bottom currents related to WSC activity were at their maximum between 9000 and 7500 cal a BP, i.e. during a period of elevated water temperature, probably resulting in maximum relative heat fluxes to the Arctic. |
author2 |
Polish National Science Center |
format |
Article in Journal/Newspaper |
author |
STERNAL, BEATA SZCZUCISKI, WITOLD FORWICK, MATTHIAS ZAJĄCZKOWSKI, MAREK LORENC, STANISŁAW PRZYTARSKA, JOANNA |
spellingShingle |
STERNAL, BEATA SZCZUCISKI, WITOLD FORWICK, MATTHIAS ZAJĄCZKOWSKI, MAREK LORENC, STANISŁAW PRZYTARSKA, JOANNA Postglacial variability in near‐bottom current speed on the continental shelf off south‐west Spitsbergen |
author_facet |
STERNAL, BEATA SZCZUCISKI, WITOLD FORWICK, MATTHIAS ZAJĄCZKOWSKI, MAREK LORENC, STANISŁAW PRZYTARSKA, JOANNA |
author_sort |
STERNAL, BEATA |
title |
Postglacial variability in near‐bottom current speed on the continental shelf off south‐west Spitsbergen |
title_short |
Postglacial variability in near‐bottom current speed on the continental shelf off south‐west Spitsbergen |
title_full |
Postglacial variability in near‐bottom current speed on the continental shelf off south‐west Spitsbergen |
title_fullStr |
Postglacial variability in near‐bottom current speed on the continental shelf off south‐west Spitsbergen |
title_full_unstemmed |
Postglacial variability in near‐bottom current speed on the continental shelf off south‐west Spitsbergen |
title_sort |
postglacial variability in near‐bottom current speed on the continental shelf off south‐west spitsbergen |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1002/jqs.2748 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2748 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2748 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Spitsbergen |
genre_facet |
Arctic Spitsbergen |
op_source |
Journal of Quaternary Science volume 29, issue 8, page 767-777 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.2748 |
container_title |
Journal of Quaternary Science |
container_volume |
29 |
container_issue |
8 |
container_start_page |
767 |
op_container_end_page |
777 |
_version_ |
1809895248109764608 |