engleski

Deterministic chaos in radon time variations

Radon concentrations were continuously measured outdoors, in living room and basement in 10 minute intervals for a month. The radon time series were analyzed by comparing algorithms to extract phase-space dynamical information. The application of fractal methods enabled to explore the chaotic nature of radon in the atmosphere. The computed fractal dimensions, such as Hurst exponent (H) from the rescaled range analysis, Lyapunov exponent (lambda) and atractor dimension, provided estimates of the degree of chaotic behavior. The obtained low values of the Hurst exponent (0<H<0.5) indicated antipersistent behavior (non random changes) of the time series, but the positive values of the lambda pointed out the grate sensitivity on initial conditions or appearing deterministic chaos by radon time variations. The calculated fractal dimensions of atractors indicated more influencing (meteorological) parameters on radon in the atmosphere.

radon; time series; chaos

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