!============
axis_entry: depth_coord
!============
!
!  This vertical coordinate is used in z-coordinate models 
!   The units are meters (m), and it has a value of 0. at the surface
!   and becomes more and more positive with depth.
!
!------------
!
! Axis attributes:
!----------------------------------	
standard_name:    depth
units:            m
axis:             Z
positive:	  down
long_name:        ocean depth coordinate
!----------------------------------	
!
! Additional axis information:
!----------------------------------	
out_name:         lev
must_have_bounds: yes
stored_direction: decreasing
valid_min:        0.
valid_max:        12000.
!----------------------------------	
!
!============
axis_entry: ocean_double_sigma
!============
!
!------------
!
! Axis attributes:
!----------------------------------	
standard_name:    ocean_double_sigma
axis:             Z
positive:	  up
long_name:        ocean double sigma coordinate
!----------------------------------	
!
! Additional axis information:
!----------------------------------	
out_name:         lev
must_have_bounds: yes
formula:          for k <= k_c:\n z= sigma*f \n for k > k_c:\n z= f + (sigma-1)*(depth-f) \n f= 0.5*(z1+ z2) + 0.5*(z1-z2)* tanh(2*a/(z1-z2)*(depth-href))
z_factors:        sigma: sigma depth: depth z1: z1 z2: z2 a: a_coeff href: href k_c: k_c
z_bounds_factors: sigma: sigma_bnds depth: depth z1: z1 z2: z2 a: a href: href k_c: k_c
!----------------------------------	
!
!----------------------------------	
!
!
! ***************************************************************
!
! Vertical coordinate formula_terms:
!
! ***************************************************************
!
!============
variable_entry: depth
!============
!----------------------------------
! Variable attributes:
!----------------------------------
units:        m
long_name:    Sea Floor Depth
comment:      Ocean bathymetry.
!----------------------------------
! Additional variable information:
!----------------------------------
dimensions:      longitude latitude
out_name:        depth
type:            real
valid_min:        0.
valid_max:        12000.
ok_min_mean_abs:  2000.
ok_max_mean_abs:  5000.
!----------------------------------
!
!
!============
variable_entry: sigma
!============
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: sigma(k)
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
dimensions:         olevel
type:               double
!----------------------------------	
!
!
!============
variable_entry: sigma_bnds
!============
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: sigma(k+1/2)
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
dimensions:         olevel
type:               double
!----------------------------------	
!
!
!============
variable_entry: zlev
!============
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: zlev(k)
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
dimensions:         olevel
type:               double
!----------------------------------	
!
!
!============
variable_entry: zlev_bnds
!============
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: zlev(k+1/2)
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
dimensions:         olevel
type:               double
!----------------------------------	
!
!
!
!============
variable_entry: depth_c
!============
!
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: depth_c
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
type:               double
!----------------------------------
!
!
!============
variable_entry: a
!============
!
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: coefficient a
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
type:               double
!----------------------------------
!
!
!============
variable_entry: b
!============
!
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: coefficient b
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
type:               double
!----------------------------------
!
!
!============
variable_entry: nsigma
!============
!
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: nsigma
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
type:               integer
!----------------------------------
!
!
!============
variable_entry: z1
!============
!
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: z1
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
type:               double
!----------------------------------
!
!
!============
variable_entry: z2
!============
!
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: z2
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
type:               double
!----------------------------------
!
!
!============
variable_entry: href
!============
!
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: href
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
type:               double
!----------------------------------
!
!
!============
variable_entry: k_c
!============
!
!------------
!
! Variable attributes:
!----------------------------------	
long_name:   vertical coordinate formula term: k_c
!----------------------------------	
!
! Additional variable information:
!----------------------------------	
type:               integer
!----------------------------------
!
!
