Hi, The air variable in the attached file has the attributes: air:add_offset = 512.81f ; air:scale_factor = 0.01f ; As described in the section on "common attributes" in the NetCDF Users Guide, these indicate the 32-bit floating-point values have been stored in 16-bit packed integers. You can recover the unpacked values using a formula such as unpacked_data_value = packed_data_value * scale_factor + add_offset See: http://www.unidata.ucar.edu/software/netcdf/docs/BestPractices.html#Packed%20Data%20Values and http://www.unidata.ucar.edu/software/netcdf/docs/netcdf.html#Attribute-Conventions --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: SPQ-770598 Department: Support netCDF Priority: Normal Status: Closed