[CF-metadata] new vertical coordinate

[Beate.Geyer at gkss.de]

Perhaps we can include following lines in the description of hybrid height 
coordinate:

To describe the height coordinate after Gal-Chen and Somerville, 1975, 
which is 
gal-chen(k) = ztop*( z(k,j,i)-zs(j,i) )/( ztop-zs(j,i) )
where gal-chen(k) is the Gal-Chen height of the vertical gridpoint (k), 
z(k,j,i) is altitude at gridpoint (k,j,i), ztop is the height at the top 
of the model,  and zs(j,i) is the surface altitude at horizontal gridpoint 
(j,i) (topography), 
use
a(k)= gal-chen(k) and b(k)= 1 - gal-chen(k)/ztop

Regards,
Beate

====================================================
 Dr. Beate Geyer 
 GKSS Research Centre 
 Institute for Coastal Research 
 Max-Planck-Str. 
 D-21502 Geesthacht, Germany 

E-Mail:   Beate.Geyer at gkss.de
Phone:  04152-871871
www: http://icts.gkss.de
====================================================
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