Hi Jian, You need to set: set test_compute_climo = 0 # (0=ON,1=OFF) set cntl_compute_climo = 0 # (0=ON,1=OFF) This will tell the package it needs to compute the climatology. The climatology are not output by CESM. Right now, you have set your script to compute the climatology a siingle year (the year). I am not sure this is what you want to do.Cecile