Bergen Open Research Archive

Topographically Controlled Flow in the Isfjorden Trough and the West Spitsbergen Shelf

Bergen Open Research Archive

Show simple item record Vaardal-Lunde, Juni 2012-02-08T08:18:15Z 2012-02-08T08:18:15Z 2011-11-20 2011-11-20 en
dc.description.abstract A one layer numerical model demonstrates how the Atlantic Water (AW) from the West Spitsbergen Current (WSC) is topographically steered onto the West Spitsbergen Shelf (WSS) with a special emphasise on the Isfjorden Trough. Model results show that the WSC connects easier to the Isfjorden Trough than anywhere else on the shelf, letting the trough be exposed to warm and salty AW. When increasing the maximum velocity of the WSC more inflow into the troughs and consequently onto the WSS is observed in the model. The flow tends to follow steeper bathymetry when we increase the maximum velocity of the WSC and the topographical guiding is Rossby number dependent. Where isobaths converge, so will the streamlines, indicating stronger flow over steeper topography. This will increase the velocity shear and force the flow to follow deeper isobaths while circulating the troughs. The model is used to explain the January 2006 event, where an accumulation of warm water could be found in Isfjorden due to southerly winds. The simple one layer barotropic model gives a good approximation of the dynamical processes on the WSS, which plays a significant role in the cooling process of the WSC on its way to the Arctic Ocean. en
dc.format.extent 3677210 bytes en
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher The University of Bergen en
dc.rights Copyright the author. All rights reserved. en
dc.subject Isfjorden en
dc.subject Topographically en
dc.subject Controlled flow en
dc.subject West Spitsbergen Shelf en
dc.title Topographically Controlled Flow in the Isfjorden Trough and the West Spitsbergen Shelf en
dc.type Master thesis en Master i Meteorologi og oseanografi en
dc.type.course GEOF399 en
dc.subject.nsi VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 en
dc.subject.archivecode Mastergrad en
dc.subject.nus 756213 en
dc.type.program MAMN-GEOF en

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