Hi,
I had a script to concatenate files of ice and of wind (u10 and w10) of “ERA5 hourly data on single levels from 1940 to present”.
I realize that when I concatenated with ncrcat files I had problem du to dates. Looking at this file with ncview I see that in concatenade file “2020_2025” I have twice december month (of 2023, 2024, 2025) and starting from 2023 (new format file) I have 0 values (for ice and for winds) in concatenated file.
I just do “ncrcat ice_2020.nc ice_2021.nc…. ice_2025.nc ice_2020_2025.nc”
I’m sure that this comes from changes in time:units = “seconds since 1970-01-01” ;
but till now I don’t find correct command to concatenate new and old files, and I need to have concatenated files.
Thanks a lot
S.