[gradsusr] Problem in calculating moisture convergence at 200 hpa level.

[Rabah Hachelaf]

Hello,
It is not a good idea to calculat moisture convergence,because
Beyond 500 the humidity is very rare in the atmosphere, and cloud systems
using the existing moisture in the lower layers


Best regards

Rabah


2013/2/1 Arlindo Meque <mequitomz at yahoo.com.br>

>
> **
>  Dear all.
>
> I'm trying to compute moisture convergence at 200 hpa. I've successfully
> done the calculations for 850 and 500 hpa. But for 200 hpa I am getting a
> very strange output, please see the attachment.
>
>
> This is the small script I am using for that purpose:
>
>  'reinit'
> 'reset'
> 'sdfopen era.uq200.nc '
> 'sdfopen era.vq200.nc'
>  'set t 1 last'
> 'define diveuq= -(fish_div(u.1,v.2))'
> 'define mconv=diveuq'
> 'set sdfwrite ERA.mconv.200.nc <http://era.mconv.200.nc/>'
> 'sdfwrite mconv'
>
> "era.uq200.nc" is a U wind component at 200 hpa level multiplied by the
> specific humidiry athe the same level.
>
> Any idea?
>
>
> Arlindo
>
>
>
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>
>


-- 
Cordialement,
Best regards,
Rabah Hachelaf

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