Data type - netCDF-4 vs 64-bit offset

Any problems/questions that might not fall into the other topics in this category.

Data type - netCDF-4 vs 64-bit offset

Postby bwc » Tue Jul 02, 2019 2:11 pm


We recently just upgraded to WPS 4.1 and WRF 4.1.1 to accommodate the update to the GFS model which we are using as forcing data. Our previous runs, using WPS/WRF 3.9, have wrfout files of type '64-bit offset' when running a ncdump -k. Our runs with version 4.1.1 has files of type 'netCDF-4' but and are ~60% smaller in size. This is true of all the netCDF files generated - metgrid, geogrid, etc. The output appears to look reasonable and there are no prominent errors present.

Is this just due to much better file compression? Or am I missing something?

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