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首页> 外文期刊>Solar physics >One Possible Reason for Double-Peaked Maxima in Solar Cycles: Is a Second Maximum of Solar Cycle 24 Expected?
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One Possible Reason for Double-Peaked Maxima in Solar Cycles: Is a Second Maximum of Solar Cycle 24 Expected?

机译：太阳周期双峰极大值的一个可能原因：是否期望太阳周期24达到第二个最大值？

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摘要

We investigate solar activity by focusing on double maxima in solar cycles and try to estimate the shape of the current solar cycle (Cycle 24) during its maximum.We analyzed data for Solar Cycle 24 by using Learmonth Solar Observatory sunspot-group data collected since 2008. All sunspot groups (SGs) recorded during this time interval were separated into two groups: The first group includes small SGs [A, B, C, and H classes according to the Zurich classification], the second group consists of large SGs [D, E, and F]. We then calculated how many small and large sunspot groups occurred, their sunspot numbers [SSN], and the Zurich numbers [Rz] from their daily mean numbers as observed on the solar disk during a given month. We found that the temporal variations for these three different separations behave similarly. We also analyzed the general shape of solar cycles from Cycle 1 to 23 by using monthly International Sunspot Number [ISSN] data and found that the durations of maxima were about 2.9 years. Finally, we used the ascending time and SSN relationship and found that the maximum of Solar Cycle 24 is expected to occur later than 2011. Thus, we conclude that i) one possible reason for a double maximum in solar cycles is the different behavior of large and small sunspot groups, and ii) a double maximum is expected for Solar Cycle 24.
机译：我们通过关注太阳活动周期的双最大值来研究太阳活动，并试图估计当前太阳活动周期（周期24）在其最大值期间的形状。我们使用利尔蒙德太阳观测台从2008年以来收集的太阳黑子组数据分析了太阳活动周期24的数据。在此时间间隔内记录的所有黑子组（SG）分为两组：第一组包括小型SG [根据苏黎世分类的A，B，C和H类]，第二组包括大型SG [D] ，E和F]。然后，根据给定月份在太阳盘上观察到的每日平均数，我们计算出有多少个大小黑子组，它们的黑子数[SSN]和苏黎世数[Rz]。我们发现，这三种不同分离的时间变化行为相似。我们还使用月度国际太阳黑子数[ISSN]数据分析了从第1周期到第23周期太阳周期的总体形状，发现最大值的持续时间约为2.9年。最后，我们使用上升时间和SSN的关系，发现太阳周期24的最大值预期会在2011年之后发生。因此，我们得出以下结论：i）太阳周期双最大值的一个可能原因是大太阳的不同行为。和小太阳黑子群，并且ii）太阳周期24预计将达到双最大值。

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