Intermittence and peculiarities of a statistic characteristic of the geomagnetic field in geodynamo models
- 41 Downloads
The analysis of the statistical characteristics of the geomagnetic field generated in the numerical geodynamo models has shown that the distribution of the spherical harmonic coefficients in some cases is not Gaussian but, instead, has much in common with the Laplace distribution. The shape of the corresponding histograms depends on the time scale, which allows interpreting the obtained data in terms of a mixture of Gaussian distributions. The similar effects associated with the intermittence were observed in the experiments in a turbulent fluid flow. Hence, the behavior of secular variations in the magnetic field of the Earth should perhaps be described in terms of a mixture of several Gaussian stationary processes corresponding to switching between the different regimes of geodynamo generation.
Unable to display preview. Download preview PDF.
- Feller, W., An Introduction to Probability Theory and Its Applications, vol. 1, New York: Wiley, 1968.Google Scholar
- Frisch, U., Turbulence: The Legacy of A.N. Kolnmogorov, Cambridge: Cambridge Univ. Press, 1995.Google Scholar
- Shcherbakov, V.P., Khokhlov, A.V., and Sycheva, N.K., On the distribution function of the geomagnetic field intensity according to the model of a Giant Gaussian Process and empirical data, Izv., Phys. Solid Earth, 2015, vol. 51, no. 5, pp. 786–799. doi 10.7868/S0002333715050117CrossRefGoogle Scholar