Global ocean circulation
------------------------

:numref:`large-scale-circ` shows the pattern of ocean
currents at the surface of a 4° global ocean model run with
15 vertical levels. Lopped cells are used to represent topography on a
regular *lat-lon* grid extending from 70°N to
70°S. The model is driven using monthly-mean winds with
mixed boundary conditions on temperature and salinity at the surface.
The transfer properties of ocean eddies, convection and mixing is
parameterized in this model.

  .. figure:: figs/isovec_atmoce.*
    :width: 100%
    :align: center
    :alt: large-scale-circ
    :name: large-scale-circ

    Pattern of surface ocean currents from a global integration of the model at 4° horizontal resolution and with 15 vertical levels.

:numref:`large-scale-circ2` shows the meridional overturning
circulation of the global ocean in Sverdrups.

  .. figure:: figs/moc.*
    :width: 100%
    :align: center
    :alt: large-scale-circ2
    :name: large-scale-circ2

    Meridional overturning stream function (in Sverdrups) from a global integration of the model at 4° horizontal resolution and with 15 vertical levels.