Re: ncl talk

Rubin,
The cdo regridding functions do not preserve the mass in case of regridding emissions netCDF file.

When I regrid 1x1 degree to

  1. 1.9x2.5 ----> ratio old/new 4.8
  2. 2x2 ----> ratio old/new 4
  3. 1x1 -----> ratio old/new 1
  4. 0.5x0.5 -----> ratio old/new 0.25

Do you have any idea how preserve the mass or if there any other program/function to do that?

Thanks,
MO
-------------------
Mohammad Omary
Institute for the Environment
University of North Carolina
http://www.ie.unc.edu/cempd
voice:951-789-6284
omary@unc.edu<mailto:omary@unc.edu>

From: Ruben van Hooidonk <rubski@gmail.com<mailto:rubski@gmail.com>>
Date: Friday, May 23, 2014 8:29 AM
To: Mohammad Omary <omary@email.unc.edu<mailto:omary@email.unc.edu>>, "ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>" <ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>>
Subject: ncl talk

Hi,

In regards to this question:

I am new into global emissions (expert in SMOKE and CAMQ emissions) and have mozart emissions in 1x1 degree grid. Is there a utility out there to regrid the netCDF from 1x1 degree to lower resolution (1.95x2.5 degree)?

For regridding I use the Climate Data Operators (CDO https://code.zmaw.de/projects/cdo)

It is easy and super fast!

On the command line I would do:

cdo remapbil,r92x144 file_in.nc<http://file_in.nc> file_out.nc<http://file_out.nc>

Hope this helps!

Ruben

Date: Thu, 22 May 2014 17:19:02 +0000
From: "Omary, Mohammad" <omary@email.unc.edu<mailto:omary@email.unc.edu>>
Subject: regridding 1x1 degree to 1.9x2.5
To: "ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>" <ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>>
Message-ID: <CFA37F6D.155AD%omary@email.unc.edu<mailto:CFA37F6D.155AD%25omary@email.unc.edu>>
Content-Type: text/plain; charset="us-ascii"

I am new into global emissions (expert in SMOKE and CAMQ emissions) and have mozart emissions in 1x1 degree grid. Is there a utility out there to regrid the netCDF from 1x1 degree to lower resolution (1.95x2.5 degree)?

Thanks,
MO
-------------------
Mohammad Omary
Institute for the Environment
University of North Carolina
http://www.ie.unc.edu/cempd
voice:951-789-6284<tel:951-789-6284>
omary@unc.edu<mailto:omary@unc.edu><mailto:omary@unc.edu<mailto:omary@unc.edu>>

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Received on Sun Jun 1 18:14:34 2014