[gradsusr] How to calculate the pressure gradient

[Davide Sacchetti]

gradient:

component X: cdiff(press,x)/(2*"_resX")

component Y: cdiff(press,y)/(2*"_resY")

being:
  _resX='(cdiff(lon,x)/2*3.1416/180*cos(lat*3.1416/180)*6.37e6)'
  _resY='(cdiff(lat,y)/2*3.1416/180*6.37e6)'

bye bye

Davide

On Wed, 2012-08-08 at 10:46 +0200, Djordje Romanic wrote:
> Dear Users, 
> 
> I have to calculate the pressure gradient in a given area (Southeast
> Europe) and I have a pressure date at 2.5 x 2.5 degrees (reanalysis
> data). Does anyone know how to calculate it in GrADS and how to show
> the results in the vector form? 
> 
> Thanks in advance.
> 
> Regards,
> Djordje Romanic
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> gradsusr mailing list
> gradsusr at gradsusr.org
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-- 
--> Attenzione cambio indirizzo: davide.sacchetti at arpal.gov.it
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Davide Sacchetti
Centro Funzionale Meteo Idrologico di Protezione Civile della Regione Liguria
ARPAL Unità Tecnica Complessa di livello Regionale
V.le Brigare Partigiane 2 16121 Genova (I)
tel: +39 010 6437535                    fax: +39 010 6437520
mail: davide.sacchetti at arpal.gov.it     web: www.meteoliguria.it