论文标题

太阳能周期经验规则在不同系列中的鲁棒性,包括更新的ADF Sunspot组系列

Robustness of Solar-Cycle Empirical Rules Across Different Series Including an Updated ADF Sunspot Group Series

论文作者

Usoskin, Ilya, Kovaltsov, Gennady, Kiviaho, Wilma

论文摘要

太阳周期演化的经验规则构成了太阳发电机理论的重要观察性约束。这包括将太阳周期的幅度与其上升阶段的长度以及gnevyshev-Ohl规则聚类周期与成对成对偶数循环的成对的waldmeier规则,然后是一个更强的奇数周期。这些规则是基于“古典”狼黑子编号系列建立的,该系列本质上已被重新审视,研究界发布了几套修订的集合。在这里,我们使用四个经典和经过修订的国际黑子数字和小组Sunspot-number系列测试了1749--1996时期的不同Sunspot(小组)系列的这些经验规则的鲁棒性。我们还使用新的太阳观测数据库提供了基于活跃分数(ADF)方法的Sunspot组系列的更新。我们表明,Waldmeier规则是强大的,并且独立于确切的Sunspot(组)系列:其经典和$ n+1 $(将$ n $ Th的周期的长度与($ n+1 $) - TH周期相关的($ n+1 $) - TH周期)是重要的或非常重要的,对于所有系列而言,其简化的配方(将其整个周期的幅度与完整的循环相关联)是所有的系列。 Gnevyshev-Ohl规则对于所有分析的循环8--21的序列发现了强大的规则,但在道尔顿的最低限度和之前不稳定。

Empirical rules of solar cycle evolution form important observational constraints for the solar dynamo theory. This includes the Waldmeier rule relating the magnitude of a solar cycle to the length of its ascending phase, and the Gnevyshev--Ohl rule clustering cycles to pairs of an even-numbered cycle followed by a stronger odd-numbered cycle. These rules were established as based on the "classical" Wolf sunspot number series, which has been essentially revisited recently, with several revised sets released by the research community. Here we test the robustness of these empirical rules for different sunspot (group) series for the period 1749--1996, using four classical and revised international sunspot numbers and group sunspot-number series. We also provide an update of the sunspot group series based on the active-day fraction (ADF) method, using the new database of solar observations. We show that the Waldmeier rule is robust and independent of the exact sunspot (group) series: its classical and $n+1$ (relating the length of $n$-th cycle to the magnitude of ($n+1$)-th cycle) formulations are significant or highly significant for all series, while its simplified formulation (relating the magnitude of a cycle to its full length) is insignificant for all series. The Gnevyshev--Ohl rule was found robust for all analyzed series for Cycles 8--21, but unstable across the Dalton minimum and before it.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源