issue_comments: 329230620

Sure, here you go:

Original (128.9MB): ```bash $ ncdump -h -s swh_2010_01_05_05.nc netcdf swh_2010_01_05_05 { dimensions: longitude = 720 ; latitude = 361 ; time = UNLIMITED ; // (248 currently) variables: float longitude(longitude) ; longitude:units = "degrees_east" ; longitude:long_name = "longitude" ; float latitude(latitude) ; latitude:units = "degrees_north" ; latitude:long_name = "latitude" ; int time(time) ; time:units = "hours since 1900-01-01 00:00:0.0" ; time:long_name = "time" ; time:calendar = "gregorian" ; short swh(time, latitude, longitude) ; swh:scale_factor = 0.000203558072860934 ; swh:add_offset = 6.70098898894319 ; swh:_FillValue = -32767s ; swh:missing_value = -32767s ; swh:units = "m" ; swh:long_name = "Significant height of combined wind waves and swell" ;

// global attributes: :Conventions = "CF-1.6" ; :history = "2017-08-09 16:41:57 GMT by grib_to_netcdf-2.4.0: grib_to_netcdf /data/data04/scratch/_mars-atls01-a562cefde8a29a7288fa0b8b7f9413f7-5gV0xP.grib -o /data/data05/scratch/_grib2netcdf-atls09-70e05f9f8ba4e9d19932f1c45a7be8d8-jU8lEi.nc -utime" ; :_Format = "64-bit offset" ; } Duplicate (129.0MB):bash $ ncdump -h -s swh_2010_01_05_05-duplicate.nc netcdf swh_2010_01_05_05-duplicate { dimensions: longitude = 720 ; latitude = 361 ; time = UNLIMITED ; // (248 currently) variables: float longitude(longitude) ; longitude:_FillValue = NaNf ; longitude:units = "degrees_east" ; longitude:long_name = "longitude" ; longitude:_Storage = "contiguous" ; float latitude(latitude) ; latitude:_FillValue = NaNf ; latitude:units = "degrees_north" ; latitude:long_name = "latitude" ; latitude:_Storage = "contiguous" ; int time(time) ; time:long_name = "time" ; time:units = "hours since 1900-01-01" ; time:calendar = "gregorian" ; time:_Storage = "chunked" ; time:_ChunkSizes = 1024 ; time:_Endianness = "little" ; short swh(time, latitude, longitude) ; swh:_FillValue = -32767s ; swh:units = "m" ; swh:long_name = "Significant height of combined wind waves and swell" ; swh:add_offset = 6.70098898894319 ; swh:scale_factor = 0.000203558072860934 ; swh:_Storage = "chunked" ; swh:_ChunkSizes = 1, 361, 720 ; swh:_Endianness = "little" ;

// global attributes: :_NCProperties = "version=1|netcdflibversion=4.4.1.1|hdf5libversion=1.8.18" ; :Conventions = "CF-1.6" ; :history = "2017-08-09 16:41:57 GMT by grib_to_netcdf-2.4.0: grib_to_netcdf /data/data04/scratch/_mars-atls01-a562cefde8a29a7288fa0b8b7f9413f7-5gV0xP.grib -o /data/data05/scratch/_grib2netcdf-atls09-70e05f9f8ba4e9d19932f1c45a7be8d8-jU8lEi.nc -utime" ; :_Format = "netCDF-4" ; } Masked (515.7MB):bash $ ncdump -h -s swh_2010_01_05_05-masked.nc netcdf swh_2010_01_05_05-masked { dimensions: longitude = 720 ; latitude = 361 ; time = 248 ; variables: float longitude(longitude) ; longitude:_FillValue = NaNf ; longitude:units = "degrees_east" ; longitude:long_name = "longitude" ; longitude:_Storage = "contiguous" ; float latitude(latitude) ; latitude:_FillValue = NaNf ; latitude:units = "degrees_north" ; latitude:long_name = "latitude" ; latitude:_Storage = "contiguous" ; int time(time) ; time:long_name = "time" ; time:units = "hours since 1900-01-01" ; time:calendar = "gregorian" ; time:_Storage = "contiguous" ; time:_Endianness = "little" ; double swh(time, latitude, longitude) ; swh:_FillValue = NaN ; swh:units = "m" ; swh:long_name = "Significant height of combined wind waves and swell" ; swh:_Storage = "contiguous" ;

// global attributes: :_NCProperties = "version=1|netcdflibversion=4.4.1.1|hdf5libversion=1.8.18" ; :Conventions = "CF-1.6" ; :history = "2017-08-09 16:41:57 GMT by grib_to_netcdf-2.4.0: grib_to_netcdf /data/data04/scratch/_mars-atls01-a562cefde8a29a7288fa0b8b7f9413f7-5gV0xP.grib -o /data/data05/scratch/_grib2netcdf-atls09-70e05f9f8ba4e9d19932f1c45a7be8d8-jU8lEi.nc -utime" ; :_Format = "netCDF-4" ; } ``` I assume it's about that fill/missing value changing? Thanks for the help.