Imperial College London


Faculty of Natural SciencesDepartment of Mathematics

Reader in Applied Mathematics



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BibTex format

author = {Shevchenko, I and Berloff, P},
doi = {10.1016/j.ocemod.2017.02.003},
journal = {Ocean Modelling},
pages = {55--65},
title = {On the roles of baroclinic modes in eddy-resolving midlatitude ocean dynamics},
url = {},
volume = {111},
year = {2017}

RIS format (EndNote, RefMan)

AB - This work concerns how different baroclinic modes interact and influence solutions of the midlatitude oceandynamics described by the eddy-resolving quasi-geostrophic model of wind-driven gyres. We developedmulti-modal energetics analysis to illuminate dynamical roles of the vertical modes, carried out a systematicanalysis of modal energetics and found that the eddy-resolving dynamics of the eastward jet extension of thewestern boundary currents, such as the Gulf Stream or Kuroshio, is dominated by the barotropic, and thefirst and second baroclinic modes, which become more energized with smaller eddy viscosity. In the absenceof high baroclinic modes, the energy input from the wind is more efficiently focused onto the lower modes,therefore, the eddy backscatter maintaining the eastward jet and its adjacent recirculation zones is thestrongest and overestimated with respect to cases including higher baroclinic modes. In the presence of highbaroclinic modes, the eddy backscatter effect on the eastward jet is much weaker. Thus, the higher baroclinicmodes play effectively the inhibiting role in the backscatter, which is opposite to what has been previouslythought. The higher baroclinic modes are less energetic and have progressively decreasing effect on the flowdynamics; nevertheless, they still play important roles in inter-mode energy transfers (by injecting energyinto the region of the most intensive eddy forcing, in the neighborhood of the eastward jet) that have to betaken into account for correct representation of the backscatter and, thus, for determining the eastward jetextension.
AU - Shevchenko,I
AU - Berloff,P
DO - 10.1016/j.ocemod.2017.02.003
EP - 65
PY - 2017///
SN - 1463-5011
SP - 55
TI - On the roles of baroclinic modes in eddy-resolving midlatitude ocean dynamics
T2 - Ocean Modelling
UR -
UR -
VL - 111
ER -