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The spectra above from single snaphots have a lot of noise which can be removed by time averaging. We next analyze how much averaging is necessary from an aqua planet NE256 simulation with 1 month of daily snapshots. The legend indicates how many snapshots (spaced 1 day apart) were used when averaging E(k). With 28 snapshots . Left plot is with daily snapshots, right plot is with 3h snapshots. With 1 month of averaging, the data is still a touch noisy at the lower frequencies, so we recommend at least 60 snapshots. Need to test the minimum spacing: 60 snapshots from hourly data is probably not as good as 60 snapshots from daily data. In the plot , with either daily or 3h output. There is also not much difference between daily or 3h data, so a longer simulation is more important than higher frequency output. In the plots below, each curves are all shifted downward so they would not be plotted on top of each other.
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Software needed
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