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Study of six indices of solar activity in the magnetic cycles 21 - 24тезисы доклада
- Авторы: Bruevich E.A., Yakunina G.V.
- Сборник: Fifth Workshop"Solar influences on the magnetosphere, ionosphere and atmosphere"», Nessebar, Bulgaria, 3-7 June 2013
- Серия: Тезисы на сайте конференции http://ws-sozopol.stil.bas.bg/
- Тезисы
- Год издания: 2013
- Место издания: Nessebar, Bulgaria, Nessebar, Bulgaria
- Первая страница: 12
- Последняя страница: 12
- Аннотация: Prior to 1947, the activity of the Sun was assessed by the relative numbers of sunspots (W). For the study of the variability of radiation of the chromosphere and the lower corona a new index (the 10,7 cm radio emission) became used from 1947. For the F10,7 are available more detailed observational archive data, so this activity index more often than the other indices is used in the prediction and monitoring of the solar activity. We have made the analysis of time series of F10,7 with the use of different mother wavelets: Daubechies 10, Symlet 8, Meyer, Gaus 8 and Morlet. Wavelet spectrum allows us not only to identify cycles, but analyze their change in time. Each wavelet has its own characteristic features, so sometimes with the help of different wavelets it can be better identify and highlight the different properties of the analyzed signal. We intended to choose the mother wavelet, which is more fully gives information about the analyzed index F10,7. We have received, that all these wavelets show similar values to the maximums of the cyclic activity. However, we can see the difference when using different wavelets. Also we see well detected a hundred years cyclicity. There is also a number of periods, which, perhaps, are the harmonics of main period. The mean value of 11-year cycle is about 10,2 years. All the above examples show that the best results we get when using wavelets Morley, Gauss (real-valued) and multiparameter family of wavelets Morley and Gauss (complex-valued).
- Добавил в систему: Якунина Галина Валентиновна