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The results of the nonlinearity analysis of the temperature time series with different sampling steps are presented. The values of statistical functions describing the amount of information contained in one time series relative to another are calculated. The graphs of the Lyapunov exponent plotted. The nonlinearity of the studied time series was checked using White's test and Terasvirt's test. In both tests, Fisher's criteria and chi-square's criteria reject the null hypothesis, i.e. confirm the nonlinearity nature of the time series under study.
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I. A. Botygin, V. A. Tartakovsky, V. S. Sherstnev, A. I. Sherstneva, N. P. Shkulov, "Study of the chaotic behaviour of temperature time series processes," Proc. SPIE 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 119165K (15 December 2021); https://doi.org/10.1117/12.2602969