1200	  'idm   ' = longitudinal array size
  1684	  'jdm   ' = latitudinal  array size
  26	  'kdm   ' = number of layers
  26      'nhybrd' = number of hybrid levels (0=all isopycnal)
  13      'nsigma' = number of sigma  levels (nhybrd-nsigma z-levels)
   3.0    'dp00  ' = deep    z-level spacing minimum thickness (m)
   300.0  'dp00x ' = deep    z-level spacing maximum thickness (m)
   1.16   'dp00f ' = deep    z-level spacing stretching factor (1.0=const.space)
   0.27   'ds00  ' = shallow z-level spacing minimum thickness (m)
   27.0   'ds00x ' = shallow z-level spacing maximum thickness (m)
   1.16   'ds00f ' = shallow z-level spacing stretching factor (1.0=const.space)
   2      'thflag' = reference pressure flag (0=Sigma-0, 2=Sigma-2, 4=Sigma-4)
  34.0    'thbase' = reference density (sigma units)
    4.7500    'sigma ' = sigma     (sigma 2)
    4.8750    'sigma ' = sigma     (sigma 2)
    5.5000    'sigma ' = sigma     (sigma 2)
    5.8750     'sigma ' = sigma     (sigma 2)
    6.1250     'sigma ' = sigma     (sigma 2)
   32.2500    'sigma ' = sigma     (sigma 2)
   33.3500    'sigma ' = sigma     (sigma 2)
   33.7800    'sigma ' = sigma     (sigma 2)
   34.3600    'sigma ' = sigma     (sigma 2)
   34.8100    'sigma ' = sigma     (sigma 2)
   35.0950    'sigma ' = sigma     (sigma 2)
   35.3325    'sigma ' = sigma     (sigma 2)
   35.4775    'sigma ' = sigma     (sigma 2)
   36.0000    'sigma ' = sigma     (sigma 2)
   36.4900    'sigma ' = sigma     (sigma 2)
   36.7600    'sigma ' = sigma     (sigma 2)
   36.8600    'sigma ' = sigma     (sigma 2)
   36.9300    'sigma ' = sigma     (sigma 2)
   36.9985    'sigma ' = sigma     (sigma 2)
   37.0420    'sigma ' = sigma     (sigma 2)
   37.0830    'sigma ' = sigma     (sigma 2)
   37.1070    'sigma ' = sigma     (sigma 2)
   37.1205    'sigma ' = sigma     (sigma 2)
   37.1287    'sigma ' = sigma     (sigma 2)
   37.2500    'sigma ' = sigma     (sigma 2)
   37.48      'sigma ' = sigma     (sigma 2)
  19.2    'thkmin' = minimum mixed-layer thickness (m)