We show here results computed over either one or two cycles and with a cycle being either 100 or 90-day long. If we compare Figs. 2 and 3, it shows that the time rate of change and the nonlinear term of the equation are sensitive to the choice of the cycles while the dissipative term is not.

computed with `theory_test_several_cycles_script.m` in `RESEARCH/MODELISATION/HIM/studies/PV_and_dissipation/forced_damped_wave/exp20` on the main `ipu1` disk. The Matlab files are `diag_VC_two_cycles_100day_long_exp20.mat` for Fig. 1, `diag_VC_two_cycles_90day_long_exp20.mat` for Figs. 2 and 4 and `diag_VC_two_cycles_90day_long_exp20_diff_init_times.mat` for Fig. 3, in that same directory.