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The Gulf Stream Extension Region: Its dynamics and interaction with the atmosphere

Martin Claus-2011-01-01-Helmholtz Centre for Ocean Research Kiel (GEOMAR)
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TL;DRAbstract

The Gulf Stream Extension Region is a key region for meridional heat transport of the Earth system. Its importance for the climate and for seasonal prediction has been increasingly recognized in recent years. However, the dynamics of the ocean in this region are not understood sufficiently. There are basically three mechanisms to explain the observed increase of barotropic transport and the formation of recirculation gyres in the Gulf Stream Extension Region: (i) advection of potential vorticity, (ii) Joint Effect of Baroclinicity and Relief and (iii) eddy momentum flux, of which the latter is investigated in the present work. 16 years of satellite derived surface velocities of weekly resolution are used to compute the eddy momentum flux and its seasonal and NAO related variability. These fluxes were used to drive a diagnostic linear shallow water model to estimate the mean barotropic transport and its variability associated with turbulent momentum flux. The results show that eddy mome

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The Gulf Stream Extension Region is a key region for meridional heat transport of the Earth system. Its importance for the climate and for seasonal prediction has been increasingly recognized in recent years. However, the dynamics of the ocean in this region are not understood sufficiently. There are basically three mechanisms to explain the observed increase of barotropic transport and the formation of recirculation gyres in the Gulf Stream Extension Region: (i) advection of potential vorticity, (ii) Joint Effect of Baroclinicity and Relief and (iii) eddy momentum flux, of which the latter is investigated in the present work. 16 years of satellite derived surface velocities of weekly resolution are used to compute the eddy momentum flux and its seasonal and NAO related variability. These fluxes were used to drive a diagnostic linear shallow water model to estimate the mean barotropic transport and its variability associated with turbulent momentum flux. The results show that eddy mome

Keywords

Ocean gyreGulf StreamBarotropic fluidBaroclinityMesoscale meteorologyEddyGeologyClimatology

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