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@article{Shevchenko:2016:10.3390/fluids1030028,
author = {Shevchenko, I and Berloff, P},
doi = {10.3390/fluids1030028},
journal = {Fluids},
title = {Eddy Backscatter and Counter-Rotating Gyre Anomalies of Midlatitude Ocean Dynamics},
url = {http://dx.doi.org/10.3390/fluids1030028},
volume = {1},
year = {2016}
}
TY - JOUR
AB - This work concerns how two competing mechanisms – eddy backscatter and2 counter-rotating gyre anomalies – influence the midlatitude ocean dynamics, as described by3 the eddy-resolving quasi-geostrophic (QG) model of wind-driven gyres. We analysed dynamical4 balances and effects of different eddy forcing components, as well as their dependencies on5 increasing vertical resolution and decreasing eddy viscosity and found that the eastward jet6 and its adjacent recirculation zones are maintained mostly by the eddy forcing via the eddy7 backscatter mechanism, whereas the time-mean eddy-forcing component plays not only direct8 jet-supporting but also indirect jet-inhibiting role. The latter is achieved by inducing zonally9 elongated anticyclonic/cyclonic Counter-rotating Gyre Anomaly (CGA) in the subpolar/subtropical10 gyre. The indirect effect of CGAs on the eastward jet is found to be moderate relative to the dominant11 eddy backscatter mechanism. We also found that the higher is the vertical baroclinic mode, the12 weaker is its backscatter role and the stronger is its CGA-driving role. Although the barotropic and13 first baroclinic modes are the most efficient ones in maintaining the backscatter, the higher, up to the14 fifth baroclinic modes also have significant but reverse impact that reduces the backscatter
AU - Shevchenko,I
AU - Berloff,P
DO - 10.3390/fluids1030028
PY - 2016///
SN - 2311-5521
TI - Eddy Backscatter and Counter-Rotating Gyre Anomalies of Midlatitude Ocean Dynamics
T2 - Fluids
UR - http://dx.doi.org/10.3390/fluids1030028
UR - http://hdl.handle.net/10044/1/39688
VL - 1
ER -
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