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f67abf1ee3 Jeff*0001 Convection and mixing over topography
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0005 Dense plumes generated by localized cooling on the continental shelf of the
0006 ocean may be influenced by rotation when the deformation radius is smaller
0007 than the width of the cooling region. Rather than gravity plumes, the
0008 mechanism for moving dense fluid down the shelf is then through geostrophic
0009 eddies. The simulation shown in :numref:`fig_convect_and_topo`
0010 (blue is cold dense fluid, red is
0011 warmer, lighter fluid) employs the non-hydrostatic capability of MITgcm to
0012 trigger convection by surface cooling. The cold, dense water falls down the
0013 slope but is deflected along the slope by rotation. It is found that
0014 entrainment in the vertical plane is reduced when rotational control is
0015 strong, and replaced by lateral entrainment due to the baroclinic
0016 instability of the along-slope current.
0017
0018 .. figure:: figs/plume.png
0019 :width: 70%
0020 :align: center
0021 :alt: Non-hydrostatic plume over a shelf
0022 :name: fig_convect_and_topo
0023
0024 MITgcm run in a non-hydrostatic configuration to study convection over a slope.
0025
