Ocean Dynamics

, Volume 52, Issue 4, pp 179-193

First online:

The upper ocean circulation at Great Meteor Seamount

  • Christian MohnAffiliated withAlfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany e-mail: beckmann@awi-bremerhaven.de
  • , Aike BeckmannAffiliated withAlfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany e-mail: beckmann@awi-bremerhaven.de

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Abstract

 Recent observations of hydrography and currents at the Great Meteor Seamount are combined with a numerical model to investigate the flow regime at this seamount. Periodic tidal forcing is the dominant process, leading to trapped waves, flow rectification, internal wave generation and a system of closed circulation cells. Steep slopes and a flat summit plain lead to a previously unreported mixed-layer thickness anomaly along the edge of the seamount. The seamount vicinity is characterized by high levels of variability in the tidal band, on spatial scales set by the topography – and the data from even relatively dense observational grids alone may lead to serious misinterpretations of the nature of the seamount-induced circulation and mass structure. The model will be used in Part II of this study to further investigate biologically relevant questions.

Keywords Meteor Seamount Hydrography Numerical model Tidal rectification Internal tides Variability