Centennial variations in sunspot number, open solar flux, and streamer belt width: 2. Comparison with the geomagnetic data

Centennial variations in sunspot number, open solar flux, and streamer belt width: 2. Comparison with the geomagnetic data
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太阳黑子数量、开放太阳通量和流带宽度的百年变化:2.与地磁数据的比较

DOI:
10.1002/2014ja019972
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发表时间:
2014
期刊:
Space Physics
影响因子:
--
通讯作者:
Lockwood M
Lockwood M
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--
文献类型:
--
作者:
Lockwood M

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研究了地磁活动指数IDVandIDV(1d)、修正后的太阳黑子数RC和群黑子数rg的日变化关系。RCuses对论文1中导出的“Waldmeier不连续”和Leussu et al.(2013)揭示的“Wolf不连续”进行了修正。我们的研究表明,地磁指数与cnorrgns的简单相关性掩盖了相当大的太阳周期变化。利用idv (1d)或idv来预测或评估太阳黑子数量,考虑到这种关系随太阳周期的变化,误差几乎减少了一半。结果表明,rga和rga之间的差异有多种原因,并且不太可能像最近假设的那样归因于rga中的任何一个错误。由于不知道rcorrgis是否能更好地预测1874年之前的开放通量,因此建议使用一种简单的太阳黑子数复合方法,该方法与erg一样,能够在论文3中模拟1610年以后的开放太阳通量,但保持了rc的特征。
We investigate the relationship between interdiurnal variation geomagnetic activity indices,IDVandIDV(1d), corrected sunspot number,RC, and the group sunspot numberRG.RCuses corrections for both the “Waldmeier discontinuity,” as derived in Paper 1, and the “Wolf discontinuity” revealed by Leussu et al. (2013). We show that the simple correlation of the geomagnetic indices withRCnorRGnmasks a considerable solar cycle variation. UsingIDV(1d) orIDVto predict or evaluate the sunspot numbers, the errors are almost halved by allowing for the fact that the relationship varies over the solar cycle. The results indicate that differences betweenRCandRGhave a variety of causes and are highly unlikely to be attributable to errors in eitherRGalone, as has recently been assumed. Because it is not known ifRCorRGis a better predictor of open flux emergence before 1874, a simple sunspot number composite is suggested which, likeRG, enables modeling of the open solar flux for 1610 onward in Paper 3 but maintains the characteristics ofRC.
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