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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 8
Ann. Geophys., 15, 1076–1083, 1997
https://doi.org/10.1007/s00585-997-1076-0
© European Geosciences Union 1997
Ann. Geophys., 15, 1076–1083, 1997
https://doi.org/10.1007/s00585-997-1076-0
© European Geosciences Union 1997

  31 Aug 1997

31 Aug 1997

The shelf-edge current north-west of Ireland

M. White and P. Bowyer M. White and P. Bowyer
  • Department of Oceanography, Martin Ryan Marine Science Institute, University College, Galway, Ireland

Abstract. Measurements of the slope current at two locations north-west of Ireland have been made between April and December 1994, 40 m above the seabed in a water depth of 660 m. A persistent poleward along-slope current was observed at both locations, with measured means of 10 and 21cms–1 respectively. A CTD transect across the slope near one mooring indicated the presence of a light, warm, saline core of water at the shelf edge. Peak currents were O(50)cms–1, with strongest mean flow at the location with steeper slope. Variability at sub-tidal periods, principally 2–5 and 11–12 days, was apparent. The shorter-period variability was well correlated with coastal sea-level variations measured at a land point near to one of the moorings. The variability in the slope current at this period appeared to be a result of the warm current core movement up/down slope, probably as a result of interaction with higher-mode shelf waves. Some suggestion of a bottom-trapped diurnal wave was also found at one location.

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