How should I use CDO selyear? I get an output file four times larger

Question

CDO seems to work fine for me, until I met this. I have a netcdf of daily data from year 2101 to 2228, and I want to obtain a file with only years from 2101 to 2227, so I run:

cdo selyear,2101/2227 in.nc out.nc

But the output file is more than four times the input in memory size! It seems to have the right number of time steps, and the initial and end date are correct. Also, latitude and longitude seem to be the same as the input, so I wonder why the file size.

Answer 1

也许尝试使用 cdo 运算符保留压缩并输出 netcdf 4

cdo -f nc4c -z zip_9 selyear,2101/2227 in.nc out.nc