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[ferret_users] time axis of over 9999 yr



Hi—

Defining this time axis works for plotting 1000 decadal averages (from a
netCDF file with badly defined time axis):

  define axis/t="1-jul-0000":"1-jul-9999":1/units="years"/npoints=1000/cal=noleap/edges tdecadal

But I need a time axis that spans over more than 9999 yr:

  define axis/t="1-jul-0000":"1-jul-15000":1/units="years"/npoints=1500/cal=noleap/edges tdecadal
     **ERROR: command syntax: 1-jul-15000 is not valid in this calendar

The noleap and (extended) gregorian calendars appear to be limited to
have four digits for the years.  Is there a calendar that can do up to
six digits, or a way to define it?

—Marco


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