Ertel PV question

To whom it may concern,
I am currently trying
to
calculate Ertel's
Potential Vorticity given output information from an NetCDf file. I have been
reading some of the threads pertaining to PV, but I had two
questions:

1) are there any codes for calculating Ertel's PV
2) if
not, then are there codes for calculating relative vorticity on a constant
theta surface (relative vorticity is one component of Ertel's PV
equation)

Any feedback would be much appreciated. Thank you.

Jeff
Waters
Graduate Student
Department of Meteorology
Penn State
University '11

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Received on Mon May 10 08:41:04 2010