write.temperature: Write a temperature field as a netcdf file.
In JGCRI/fldgen: Generate Temperature Fields with Spatial and Temporal Correlation

Format a field as a netcdf file and write it to the specified file. The lat, lon, and time variables from the griddata input are used to recover the original size of the grid, reversing the flattening procedure.

write.temperature(
  fld,
  file,
  griddata,
  varname = "tas",
  varunit = "K",
  vardesc = "2m air temperature",
  tunit = "years since 2006",
  clobber = FALSE
)

`fld`	A matrix ntime x ngrid containing the field to write out.
`file`	Name of the output file.
`griddata`	A griddata structure returned from the `read.temperatures` function.
`varname`	Name to use for the variable in the output file.
`varunit`	Units of the variable in the field.
`vardesc`	Description string to write into the `longname` attribute in the output file.
`tunit`	Units for the time variable.
`clobber`	If `TRUE`, overwrite the file if it exists; otherwise trying to write a file that already exists is an error.