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Nils Brüggemann and Carsten Eden

corresponding zonal means. The balance for the mean kinetic energy (MKE) is thus obtained by multiplying Eq. (3) with the zonal-mean velocity and applying a zonal average afterward. Correspondingly, we obtain a balance for the eddy kinetic energy (EKE) by multiplying Eq. (3) with the eddy velocity before we take the zonal average. Budgets for the mean available potential energy (MPE) and the eddy available potential energy (EPE) are obtained likewise by multiplying Eq. (5) by the mean buoyancy and the

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C. Ménesguen, S. Le Gentil, P. Marchesiello, and N. Ducousso

relatively large N / f ratio (resembling an idealized meddy, i.e., Mediterranean water eddy). We will show that this regime does not lead to significant forward energy cascade. In addition, the study will emphasize the importance of numerical settings in finite-difference PE models for properly representing submesoscale energy transfers. The question of the influence of N / f or other physical parameters, such as the Rossby number, is the topic of another study. The paper is

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A. M. Treguier, C. Lique, J. Deshayes, and J. M. Molines

) , who analyzed the potential vorticity budget of the 18°C water in an earlier regional version of the Drakkar model. The analysis of eddy fluxes of salt in the same regional configuration by Treguier et al. (2012) has motivated the present investigation of the eddy heat flux. 3. Structure of the eddy heat transport near the Gulf Stream separation The surface meridional eddy flux is computed from observations ( Fig. 1a ) and model ( Fig. 1c ), averaged over the same 10-yr period (2003–12). The

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François Ascani, Eric Firing, Julian P. McCreary, Peter Brandt, and Richard J. Greatbatch

time span of measurements used for the average (~13 yr) is 2 to 3 times longer that the period of the EDJs (5 ± 1 yr; Johnson and Zhang 2003 ). Table 1. List of abbreviations for currents and ocean motions used in the text. Both sets of currents contribute to the global ocean circulation and the zonal distribution of water masses and biogeochemical quantities. For instance, the eastward jets have been shown to supply dissolved oxygen to the oxygen minimum zone of the deep eastern equatorial

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W. K. Dewar, J. C. McWilliams, and M. J. Molemaker

mean potential energy at the depths of the CUC are argued to average O (0.5) mW m −2 with local maxima reaching 3.4 mW m −2 . The rates computed here are comparable to those estimated in M15 . Modern global energetics budgets routinely estimate the flux of kinetic energy to small scales needed to maintain the observed stratification at roughly 6 mW m −2 . Of this, 1.0 mW m −2 is thought to create the potential energy stored in the mean stratification. This comparison argues that centrifugal

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Benjamin A. Storer, Francis J. Poulin, and Claire Ménesguen

1. Introduction The dynamical importance of interior mesoscale eddies in the oceanic energy budget and transport is well documented in the literature and excellent reviews can be found in McWilliams (1985) and Carton (2001) . Examples of deep mesoscale eddies can be found west of the Strait of Gibraltar where a bottom-dwelling current detaches from the floor at a level of neutral buoyancy. The high speeds of this current lead to the formation of vortices, which are both warm and salty since

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