**Previous message:**murphys@cgd.ucar.edu: "Re: Character"**Maybe in reply to:**Walter Kolczynski, Jr.: "Hybrid of Pressure to Isentropic Coordinates"**Next in thread:**Dennis Shea: "Re: Hybrid of Pressure to Isentropic Coordinates"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]

*>
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*>Walter,
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*>we have examples of converting the hybrid model to pressure
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*>coordinates at:
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*>http://www.cgd.ucar.edu/csm/support/Data_P/vert_interp.shtml
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*>
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*>I am not sure what isentropic coordinates are, and we
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*>certainly don't have an example of converting hybrid coordinates
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*>to them. If this means an iso level surface, I have a CMPS
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*>operator that will extract one, but you would probably want
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*>to convert to pressure first before useing.
*

Isentropic surfaces are surfaces of constant potential temperature.

Actually, I think one could create a function

function vinth2isentropic(

datai : numeric,

hbcofa[*] : numeric,

hbcofb[*] : numeric,

isentropic[*] : numeric, ; specified by user.

psfc : numeric,

intyp[1] : integer,

p0[1] : numeric,

ii[1] : integer,

kxtrp[1] : logical

T

)

x_Isentropic = vinth2isentropic(X,.,isentropic,.,T)

Where T would be Temperature at the hybrid levels

(1) calculate the pressure at each hybrid level

(2) calculate the potential temperature at each hybrid level

(3) now one has X and potential temperature at each hybrid

level so, then interpolate the X to the desired

isentropic levels.

D

*>
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*>> Hi All,
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*>>
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*>> I'm new to NCL, and I'm trying to convert model (cam2) data I have from
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*>> hybrid-sigma or pressure coordinates to isentropic coordinates. I looked
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*>> through the NCLtalk archive and didn't find any entries on this subject.
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*>> I was hoping someone has done this and could help me out.
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*>>
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*>> - Walter
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*>
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*>
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*>
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*>_______________________________________________
*

*>ncl-talk mailing list
*

*>ncl-talk AT ucar.edu
*

*>http://mailman.ucar.edu/mailman/listinfo/ncl-talk
*

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**Next message:**Dennis Shea: "Re: Character"**Previous message:**murphys@cgd.ucar.edu: "Re: Character"**Maybe in reply to:**Walter Kolczynski, Jr.: "Hybrid of Pressure to Isentropic Coordinates"**Next in thread:**Dennis Shea: "Re: Hybrid of Pressure to Isentropic Coordinates"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]

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