Sediment supply and fluxes in glacial and outwash fjords
Abstract: The buoyant hypopycnal flow of brackish water and suspended sediment trans− port and settling were studied in two sub−polar fjords: the glacial Kongsfjorden and the outwash (non−glacial contact) Adventfjorden, Svalbard. The data presented indicates faster water mixing on the tidal flat in...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.476.3503 2023-05-15T13:05:53+02:00 Sediment supply and fluxes in glacial and outwash fjords Marek Zajączkowski The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.476.3503 http://polar.pan.pl/ppr29/PPR29-059.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.476.3503 http://polar.pan.pl/ppr29/PPR29-059.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://polar.pan.pl/ppr29/PPR29-059.pdf Key words Arctic Spitsbergen subpolar fjords meltwater sediment flux turbidity cur− text ftciteseerx 2016-01-08T07:36:29Z Abstract: The buoyant hypopycnal flow of brackish water and suspended sediment trans− port and settling were studied in two sub−polar fjords: the glacial Kongsfjorden and the outwash (non−glacial contact) Adventfjorden, Svalbard. The data presented indicates faster water mixing on the tidal flat in comparison to the englacial runoff, which leads to faster horizontal density gradients decreases in the non−glaciated fjord. The fast settling of parti− cles in the narrow zone of the steep slope at the edge of the tidal flat leads to the removal of 25 % of the surface suspended sediment. The rapid settling is due to increasing salinity, de− creasing velocity, and flocculation of fine particles. The fast settling of suspended particu− late matter (SPM) in the tidal flat area causes sediment redeposition and resuspension fol− lowed by sediment transport along the bottom with hyperpycnal flows. This leads to grain sorting in the fjord head. In contrast, at the glacier front, SPM is transported farther into the fjord, where tidal pumping and water mixing lead to the removal of 71 % of total SPM. The fjords investigated represent two different sedimentological regimes. In the glaciated Kongsfjorden, the buoyant hypopycnal flow of brackish water is the main sediment trans− porting factor. In the non−glacial Adventfjorden, hyperpycnal flows transport sediment along the bottom. Text Adventfjorden Arctic glacier Kongsfjord* Kongsfjorden Svalbard Spitsbergen Unknown Adventfjorden ENVELOPE(15.515,15.515,78.258,78.258) Arctic Svalbard |
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Open Polar |
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Unknown |
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English |
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Key words Arctic Spitsbergen subpolar fjords meltwater sediment flux turbidity cur− |
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Key words Arctic Spitsbergen subpolar fjords meltwater sediment flux turbidity cur− Marek Zajączkowski Sediment supply and fluxes in glacial and outwash fjords |
topic_facet |
Key words Arctic Spitsbergen subpolar fjords meltwater sediment flux turbidity cur− |
description |
Abstract: The buoyant hypopycnal flow of brackish water and suspended sediment trans− port and settling were studied in two sub−polar fjords: the glacial Kongsfjorden and the outwash (non−glacial contact) Adventfjorden, Svalbard. The data presented indicates faster water mixing on the tidal flat in comparison to the englacial runoff, which leads to faster horizontal density gradients decreases in the non−glaciated fjord. The fast settling of parti− cles in the narrow zone of the steep slope at the edge of the tidal flat leads to the removal of 25 % of the surface suspended sediment. The rapid settling is due to increasing salinity, de− creasing velocity, and flocculation of fine particles. The fast settling of suspended particu− late matter (SPM) in the tidal flat area causes sediment redeposition and resuspension fol− lowed by sediment transport along the bottom with hyperpycnal flows. This leads to grain sorting in the fjord head. In contrast, at the glacier front, SPM is transported farther into the fjord, where tidal pumping and water mixing lead to the removal of 71 % of total SPM. The fjords investigated represent two different sedimentological regimes. In the glaciated Kongsfjorden, the buoyant hypopycnal flow of brackish water is the main sediment trans− porting factor. In the non−glacial Adventfjorden, hyperpycnal flows transport sediment along the bottom. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Marek Zajączkowski |
author_facet |
Marek Zajączkowski |
author_sort |
Marek Zajączkowski |
title |
Sediment supply and fluxes in glacial and outwash fjords |
title_short |
Sediment supply and fluxes in glacial and outwash fjords |
title_full |
Sediment supply and fluxes in glacial and outwash fjords |
title_fullStr |
Sediment supply and fluxes in glacial and outwash fjords |
title_full_unstemmed |
Sediment supply and fluxes in glacial and outwash fjords |
title_sort |
sediment supply and fluxes in glacial and outwash fjords |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.476.3503 http://polar.pan.pl/ppr29/PPR29-059.pdf |
long_lat |
ENVELOPE(15.515,15.515,78.258,78.258) |
geographic |
Adventfjorden Arctic Svalbard |
geographic_facet |
Adventfjorden Arctic Svalbard |
genre |
Adventfjorden Arctic glacier Kongsfjord* Kongsfjorden Svalbard Spitsbergen |
genre_facet |
Adventfjorden Arctic glacier Kongsfjord* Kongsfjorden Svalbard Spitsbergen |
op_source |
http://polar.pan.pl/ppr29/PPR29-059.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.476.3503 http://polar.pan.pl/ppr29/PPR29-059.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766396142825766912 |