[ncl-talk] vinth2p help

[Dennis Shea]

You must download the 'PS' associated with the U and V. Any old 'PS' won't
do!



On Mon, Jan 25, 2016 at 2:01 PM, Adam Phillips <asphilli at ucar.edu> wrote:

> Hi Barbara,
> To answer your PS query: PS is not normally given within the individual
> variable files (U, V, for instance). You will need to download the PS files
> separately.
> Adam
>
> On Mon, Jan 25, 2016 at 1:51 PM, Dennis Shea <shea at ucar.edu> wrote:
>
>> As noted by GusC ... the following is incorrect.
>>
>> TonP = vinth2p(U(:,1,:,:),hyam,hybm,pnew,PS,interp,P0mb,1,extrap)  ?
>>
>>
>> You are passing in only one vertical (hybrid) level. Interpolation
>> requires multiple levels.
>>
>> For 'fun', try
>>
>>    printVarSummary(U(:1,:,:))
>>
>> What do you see? NCL will eliminate the "degenerate dimension".
>> Regardless, you must enter multiple levels.
>>
>> I will make one correction to GusC's suggestion. As a rule, if you are
>> referring to a full array, use U rather than for assorted reasons
>>
>> UonP = vinth2p(U,hyam,hybm,pnew,PS,interp,P0mb,1,extrap) ; pass a
>> reference (pointer to the variable)
>>
>> Note: there are numerous examples
>>
>> http://www.ncl.ucar.edu
>>
>> Click 'Examples'
>>
>> On right side, click "Vertical Interpolation"
>>
>> Good Luck
>>
>> On Mon, Jan 25, 2016 at 12:49 PM, Gus Correa <gus at ldeo.columbia.edu>
>> wrote:
>> > Maybe using all of U's four dimensions (level included):
>> >
>> > UonP = vinth2p(U(:,:,:,:),hyam,hybm,pnew,PS,interp,P0mb,1,extrap)
>> >
>> > instead of:
>> >
>> > TonP = vinth2p(U(:,1,:,:),hyam,hybm,pnew,PS,interp,P0mb,1,extrap)  ?
>> >
>> >
>> > On 01/25/2016 02:15 PM, Barbara Wortham wrote:
>> >> Hello,
>> >>
>> >> I am working to convert the elevations in U and V files from the CESM
>> >> LME dataset to pressure levels. I think I should be using vinth2p and
>> >> attached is the code I am using. However, it seems like the variable PS
>> >> can't be called upon in these files.
>> >
>> > Why?
>> > Maybe it is in another file?
>> > Or is it called "ps" instead of "PS"?
>> >
>> >> I was wondering if you had a
>> >> suggestion for a surface pressure that is anchored in space that I
>> could
>> >> use for the conversion?
>> >>
>> >> Thanks, barbara
>> >>
>> >> --
>> >> Barbara E. Wortham
>> >> Graduate Student
>> >> Boston College
>> >> Department of Earth and Environmental Science
>> >> Devlin 311
>> >>
>> >>
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>
>
>
> --
> Adam Phillips
> Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
> www.cgd.ucar.edu/staff/asphilli/   303-497-1726
>
> <http://www.cgd.ucar.edu/staff/asphilli>
>
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