[netcdfgroup] netCDF Operators NCO version 5.2.9 scratch an itch

• To: NCO Announce Mail List <nco-announce@xxxxxxxxxxxxxxxxxxxxx>, netCDF Mail List <netcdfgroup@xxxxxxxxxxxxxxxx>
• Subject: [netcdfgroup] netCDF Operators NCO version 5.2.9 scratch an itch
• From: Charlie Zender <zender@xxxxxxx>
• Date: Fri, 18 Oct 2024 13:03:29 -0700

netCDF Operators NCO version 5.2.9 scratch an itch

http://nco.sf.net (Homepage, Mailing lists, Help)
http://github.com/nco/nco (Source Code, Issues, Releases)

What's new?
Version 5.2.9 significantly improves the unpacking of ELM/CLM/CTSM
history and restart datasets. ncclimo and ncremap benefit from a
few updates and fixes. This release many be skipped if these changes
do not interest you.

Work on 5.3.0 is underway and includes yet more capability in
unpacking ELM/CLM history/restart files.

Enjoy,
Charlie

NEW FEATURES (full details always in ChangeLog):

A. ncks leveled-up the way it unpacks ELM/CLM history/restart files.
This is by far the biggest feature in this release.
New features include support for PFTs in history files, support
for topounits in ELM (PCT_LANDUNIT, PCT_NAT_PFT, TS_TOPO), a
workaround for invalid topounits coordinates, and outputting a pft
coordinate variable with vegetation names.

ncks --s1d history_h2.nc out.nc # History files usually h2, h3...
ncks --s1d --hrz=history.nc restart.nc out.nc # Restart files

http://nco.sf.net/nco.html#s1d
http://nco.sf.net/nco.html#unpack_sparse

B. ncremap now automagically horizontall regids the latest EAMxx and
SCREAM files without needing manual invocation of long, hairy
options. In particular, users can invoke

ncremap -P eamxx --map=map.nc eamxx.nc out.nc

instead of this:

ncremap -P eamxx
--prm_opt=time,lwband,swband,ilev,lev,plev,cosp_tau,cosp_cth,cosp_prs,dim2,ncol
--map=map.nc eamxx.nc out.nc

http://nco.sf.net/nco.html#eamxx

BUG FIXES:

A. ncremap fixes a regression with the vertical interpolation of ECMWF
datasets in IFS format. The regression, introduced 1-2 years ago,
causes the interpolation to abort. To vertically interpolate a hybrid
coordinate dataset in IFS format, one must now specify that the
surface pressure variable is named lnsp:

ncremap --ps_nm=lnsp --vrt_grd=vrt_grd.nc in.nc out.nc

Thanks to Erik Koene for reporting this issue. There is no
workaround. The solution is to upgrade, or to use an older NCO
version, e.g., 4.9.0.
http://nco.sf.net/nco.html#vrt_hyb_ifs

B. ncclimo fixes an illegal Bash string->numeric conversion error.
This error could occur when invoking non-default start and end
months. There is no workaround. The solution is to upgrade.

Full release statement at http://nco.sf.net/ANNOUNCE
--
Charlie Zender, Dept. of Earth System Science
University of California, Irvine 949-891-2429