[gradsusr] A question from a student

[ADI PAZ]

Good Evening.
 
I would like to know how to calculate potential vorticity in Grads.
 
I download data from reanalysis.
 
Temperature, u-wind, v-wind.
 
I know how to produce maps about those topics but, as I said, I don't know how to calculate potential vorticity.
 
By the way, I investigate a storm that occured in south of france in the beginning of november, 2011.
 
Thank you,
 
Adi.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20130831/32964e3e/attachment-0003.html