Re: [idvusers] precipitation accumulation

• To: "Tom Whittaker" <whittaker@xxxxxxxx>
• Subject: Re: [idvusers] precipitation accumulation
• From: "Luis Del Castillo" <luis.delcastillo@xxxxxxxxxxxx>
• Date: Tue, 1 Jun 2010 17:02:00 -0500

The tip from Kevin work great so right now I need to now if Accumulated
total cumulus precipitation or accumulated total grid scale
precipitation are the variables to use in this case and witch one is the
difference between the both variables.

Thanks
luis

-----Original Message-----
From: Tom Whittaker [mailto:whittaker@xxxxxxxx] 
Sent: martes, 01 de junio de 2010 11:52 a.m.
To: Luis Del Castillo
Cc: idvusers@xxxxxxxxxxxxxxxx
Subject: Re: [idvusers] precipitation accumulation

Luis --

> Ok I understand and It must help but my input data is all from WRF in
netcdf and is choppy in files per hours and have a lot of variables so
when I pick the sum over time steps it says to me that I need to pick a
field. My issue is how can I select one variable per hour to do the
accumulation.

If I understand, you have separate files for each hour of your WRF data?

If that is the case, you might be able to use NCML to aggregate your
files so they "appear" to be in a single file.  The idea is that your
create a small text file (the NCML) which logically combines your
individual files and creates a new "dimension" called "time"; you then
point the IDV at this NCML file and the NetCDF library presents the
sequence of your files as a single file to the IDV.

I have used this technique for this type of data (one hour per
file)....see
<http://www.unidata.ucar.edu/software/netcdf/ncml/v2.2/Aggregation.html>
for information about using this.   But....that's about all I know about
it!

tom


-- 
Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI  53706  USA
ph: +1 608 262 2759

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• References:
  • [idvusers] precipitation accumulation
    • From: Luis Del Castillo
  • Re: [idvusers] precipitation accumulation
    • From: Tom Whittaker
  • Re: [idvusers] precipitation accumulation
    • From: Luis Del Castillo
  • Re: [idvusers] precipitation accumulation
    • From: Tom Whittaker