[gradsusr] How to plot the atmospheric cells

[Davide Sacchetti]

On Wed, 2013-04-17 at 12:31 +0530, kalyan chakravarthy wrote:
> Dear Users,
> 
> 
> I am trying to plot Atmospheric cells such as Hadley Cell using
> monthly mean NCEP/NCAR reanalysis data
> I trying to plot from V wind and W (omega) wind at different pressure
> levels
> 
> 
> I am having some queries regarding this 
> 
> 
> 
> The script I have used to plot Hadley cell is
>  
> 
> Set lat -30 30
> set lon 50 
> set t 1(for example June)
> set lev 1000 100
> d skip(vwnd,1,1);omega.2*1.0e3

> But cann't able to see the exact upward and downward motion, Can
> anybody know about this 
> 

it may depend on omega: when omega is positive vertical motion is
negative ...: d vwnd;-omega.2*1.0e3

> 
> 2. Instead of plotting at each longitude is it possible to average
> these winds over the longitude say average between 50 100  
> 
> 
yes, e.g.:
d mean(v,lon=50,lon=100);mean(w,lon=50,lon=100)*1000


> 3 Is it possible to plot Hadley cell using stream function?
> 
> 

yes: set gxout stream
avoid skip: if different from 1,1 stream will not work

bye bye
Davide

> 
> 
>   Thanks in advance
> 
> 
> -- 
> Regards
> Y.Kalyan Chakravarthy
> 
> 
> 
> 
> 
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-- 
--> Attenzione cambio indirizzo: davide.sacchetti at arpal.gov.it
--
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