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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