Abstract
The paper shows recurrence plots obtained from time series of the level variations of four lakes in Africa (Nasser, Tana, Chad and Kainji). The data, coming from remote sensing, are provided by the United States Department of Agriculture. The recurrence plots allow a good visual comparison of the behaviours of local drainage basins.
Highlights
When represented by time series, the processes of dynamical systems can display strictly periodic on time behaviours or recurrent irregular and chaotic patterns
We can use recurrence plots to compare signals coming from different instruments, provided their origin is in the same dynamical system
If we compare these plots with those shown in [14], we see that the lake Kainji recurrence plot (Figure 6) is similar to the recurrence plot of the chaotic signal of a Rossler attractor
Summary
When represented by time series, the processes of dynamical systems can display strictly periodic on time behaviours or recurrent irregular and chaotic patterns. We can use recurrence plots to compare signals coming from different instruments, provided their origin is in the same dynamical system. We apply the recurrence plots to study and compare the oscillations of the levels of some lakes in Africa.
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