NetCDF operators (NCO) version 4.7.5

Version 4.7.5 of the netCDF Operators (NCO) has been released. NCO is an Open Source package that consists of a dozen standalone, command-line programs that take netCDF files as input, then operate (e.g., derive new data, average, print, hyperslab, manipulate metadata) and output the results to screen or files in text, binary, or netCDF formats.

The NCO project is coordinated by Professor Charlie Zender of the Department of Earth System Science, University of California, Irvine. More information about the project, along with binary and source downloads, are available on the SourceForge project page .

From the release message:

Version 4.7.5 is primarily a bugfix release for a single issue with ncremap. Version 4.7.4 inadvertently introduced a bug that mainly affects regridding of ALM/CLM/CTSM/ELM land model data that contains "hidden" (unused) dimensions. The other new feature is that ncclimo automatically handles MPAS Seaice model output named with the new names (mpassi) and new date convention, yyyy-mm-01-00000. If these fixes/features do not affect you there may be no reason to upgrade, yet see below for other minor new features you may want.

New Features
  1. ncclimo accepts mpassi in place of mpascice, mpasseaice, and accepts new MPAS output filenames of form yyyy-mm-01-00000
    ncclimo -s 2 -e 3 -m mpassi -i drc_in -o drc_out
    http://nco.sf.net/nco.html#ncclimo
  2. ncap2 allows optional scale_factor/add_offset arguments to its pack() method for those who wish to specify their own packing parameters. This override can ensure that multiple files use the same packing parameters.
    ncap2 -s 'var_pck=pack(var,-0.001,40.0)' in.nc out.nc
    http://nco.sf.net/nco.html#ncap2_mth
  3. NCO's security whitelist allows an extended character set when the input file explicitly invokes the DAP4 protocol (e.g., dap4://foo.com/in.nc). This allows DAP4 input to utilize the full set of constraint expressions.
    http://nco.sf.net/nco.html#wht_lst
  4. XML printing now includes the "ncml:" prefix on most tags. This aligns NCO XML with XML produced by toolsUI version 4.6.11, the latest (AFAICT) netCDF Java libsrary. If this change bothers you or breaks your XML workflow, let us know and we can make it optional.
    http://nco.sf.net/nco.html#xml
  5. Repeated notice: netCDF 4.6.1 fixes the CDF5 bug. Yay! We STRONGLY recommend that CDF5 users upgrade to netCDF 4.6.1. NCO error messages and HINTs have been updated to better describe the best practices to identify and avoid this nasty bug.
    http://nco.sf.net#bug_cdf5

Additional details are available in the ChangeLog.

Comments:

good

Posted by Wenbin Min on November 06, 2018 at 02:57 PM MST #

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