[RegCNET] a error about chem_icbc in V4.3

[Giuliani Graziano]

[...]
> Is the netcdf in my system too old? so i want to know the version of
> netcdf that be used to write aerosol data.
[...]

To save storage space, some of the data available from the ICTP site have
been transformed into netcdf4 files (i.e. they are HDF5 accessible through
the netcdf4 library interface).

The command used to compress was:

nccopy -k 3 -s -d 9 uncompressed.nc compressed.nc

and can be reversed with:

nccopy -k 1 compressed.nc uncompressed.nc

Note that any netcdf 4.x library compiled with compression support is able
to transparently handle those files reducing also (at least on our system)
the I/O time in reading back the data. We currently do not have anymore
systems with netcdf 3.x library around, so this version of the library may
be considered unsupported. The change will be registered in documentation
for the upcoming release of the model.
My suggestion is to uncompress back data using the above command line on a
linux system (all distributions currently have netcdf 4.x with compression
enabled), replacing the aerosol dataset files downloaded to keep on using
the netcdf version available on your system. Anyway plan for upgrading the
library on your next system upgrade.

Graziano.