Here, I am trying to determine the overall behavior of the solution `exp2_l2` in order to see where I should perform the LPV analysis. The simulation was run with a very weak wind (MAG=100), a weak horizontal dissipation (KH=10 m2/s) and with a sponge layer along the western boundary (see *Summary of results from a large set of experiments*). Fig. 1 shows the kinetic energy averaged within the intermediate layer. We see that after day 5000, the kinetic energy has reached a stationary steady state.

Fig. 2 shows the time series of U at 5°E and 30°N every 25 days (blue) and the corresponding 100-day running average (red). The lower panel, in particular, shows that between days 8000 and 9000, the variations around the 100-day mean are small compared to the mean itself which suggests that we might not need a lot of cycles for the time rate of change of LPV to be negligible compared to the other terms in the LPV balance.

Fig. 1 was done with `statistically_stationary_test.m` and Fig. 2 with `concat_script.m` in `RESEARCH/MODELISATION/HIM/studies/diss_train_of_eddies/exp2/exp2_l2/analysis_1d` on the main disk on `ipu1`.