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Phase relationship between the relative sunspot number and solar 10.7 cm flux |
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| Authors: | XueFeng Zhang GuiMing Le YanXia Zhang |
| Institution: | 1. School of Computer Science, Anhui University of Technology, Maanshan, 243032, China 2. Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China 3. Key Laboratory of Modern Astronomy and Astrophysics, Ministry of Education, Nanjing University, Nanjing, 210093, China 4. National Center for Space Weather, China Meteorological Administration, Beijing, 100081, China 5. School of Mathematics & Physics, Anhui University of Technology, Maanshan, 243032, China |
| Abstract: | A range of analysis approaches, namely continuous wavelet, cross wavelet, and wavelet coherence analyses, are employed to clarify the phase relationship between the smoothed monthly mean sunspot number and solar 10.7 cm flux (F10.7). Analysis shows that there is a region of high spectral power sitting across the Schwabe cycle belt, where the two time series are in phase. However, analysis of the cross-wavelet transform and wavelet coherence unveils asynchronous behavior featured with phase mixing in the high-frequency components of sunspot activity and solar F10.7, which may explain the different activity properties of the photosphere and corona on a short time scale. |
| Keywords: | sunspot number solar 10 7 cm flux cross wavelet wavelet coherence |
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