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http://hdl.handle.net/1956/2176
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| Tittel: | The Atlantic Water flow along the Vøring Plateau: Detecting frontal structures in oceanic station time series |
| Forfattere: | Nilsen, Jan Even Øie
Nilsen, Frank |
| Dato: | 13-Jan-2007 |
| Forlag: | Elsevier |
| Serie/Rapport nr.: | Deep-Sea Research 54(3) |
| Sammendrag: | The topographic steering of the baroclinic western branch of the Norwegian Atlantic
Current (NwAC) determines the extent of Atlantic Water and location of the Arctic
Front in the Nordic Seas. In this paper the geographical spread of hydrographic
measurements at the Ocean Weather Station M (OWSM, 66°N 2°E) is utilised
to create mean sections across the Vøring Plateau Escarpment in the Norwegian
Sea. In concert with a theoretical framework involving the impact of low pressure
systems on frontal jets over steep bathymetry, the behaviour of the front-current
system at this location is described. It is shown that the halocline and thermocline
are sloped from about 200 m in the west and down to 400 m in the east over 40 km
centred on the station, indicating that the western branch of the NwAC is located
here. The horizontal gradients introduced by this slope are 2°C and 0.1 for salinity.
The frontal slope is not seen to change its inclination on seasonal, multi-annual,
nor decadal timescales, indicating that the dynamic control of this frontal slope
does not change appreciably. Further supported by the theoretical framework it is
shown that the subsurface part of this front and the associated western branch of
the NwAC is strongly locked by topography along the Vøring Plateau also on short
timescales. From large scale bathymetry it is also shown how this kind of frontal
locking can be expected over most of the ridges and continental slopes in the Nordic
Seas. |
| URI: | http://dx.doi.org/10.1016/j.dsr.2006.12.012
http://hdl.handle.net/1956/2176 |
| ISSN: | 0198-0149 |
| Vises i samlingene: | Nansen Environmental and Remote Sensing Center (NERSC)
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