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AMER METEOROLOGICAL SOC
In:
EPIC3Journal of Physical Oceanography, AMER METEOROLOGICAL SOC, 44(12), pp. 3160-3183, ISSN: 0022-3670
Publication Date:
2019-07-16
Description:
Possibilities to construct a realistic quasi-global ocean model in Boussinesq approximation with a closed
energy cycle are explored in this study. In such a model, the energy related to the mean variables would
interact with all parameterizedforms of energy withoutany spuriousenergy sources or sinks. This means that
the energy available for interior mixing in the ocean would be only controlled by external energy input from
the atmosphere and the tidal system and by internal exchanges. In the current implementation of such
a consistent model, however, numerical biases and sources due to the nonlinear equation of state violate
energyconservation,resultinginanoverallresidualuptoseveralpercent.Inthree(approximately)consistent
model versions with different scenarios of mesoscale eddy dissipation, the parameterized internal wave field
providesbetween2and3TWforinteriormixingfromthetotalexternalenergyinputofabout4TW,suchthat
a transfer between 0.3 and 0.4 TW into mean potential energy contributes to drive the large-scale circulation
in the model. In contrast, the wind work on the mean circulation contributes by about 1.8 TW to the large-
scale circulation in all model versions. It is shown that the consistent model versions are more energetic than standard and inconsistent model versions and in better agreement with hydrographic observations.
Repository Name:
EPIC Alfred Wegener Institut
Type:
Article
,
isiRev
Format:
application/pdf
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