Predicting the start and maximum amplitude of solar cycle 24 using similar phases and a cycle grouping

查看全文 作　　者：Jia-Long [1]Wang;Wei-Guo [2]Zong;Gui-Ming [2]Le;Hai-Juan [2]Zhao;Yun-Qiu [2]Tang;Yang [2]Zhang

机构地区：[1]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;[2]National Center for Space Weather, China Meteorological Administration, Beijing 100081, China

出　　处：《Chinese Journal of Astronomy and Astrophysics》索引2009年第9卷第2期,共4页

基　　金：Supported by the National Natural Science Foundation of China;supported by NSFC through grants 10673017 and 10733020;National Basic Research Program of China through grant 2006CB806307. 摘　　要：We find that the solar cycles 9, 11, and 20 are similar to cycle 23 in their respec- tive descending phases. Using this similarity and the observed data of smoothed monthly mean sunspot numbers (SMSNs) available for the descending phase of cycle 23, we make a date calibration for the average time sequence made of the three descending phases of the three cycles, and predict the start of March or April 2008 for cycle 24. For the three cycles, we also find a linear correlation of the length of the descending phase of a cycle with the difference between the maximum epoch of this cycle and that of its next cycle. Using this relationship along with the known relationship between the rise-time and the maximum amplitude of a slowly rising solar cycle, we predict the maximum SMSN of cycle 24 of 100.2±7.5 to appear during the period from May to October 2012. 关键词：太阳周期预测大振幅太阳活动周期循环分组时间顺序太阳黑子数

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Predicting the start and maximum amplitude of solar cycle 24 using similar phases and a cycle grouping

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