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arXiv 1801.02434astro-ph.EP
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过去400年的空间气候和空间天气:2。磁暴和亚暴的代用指标

Space climate and space weather over the past 400 years: 2. Proxy indicators of geomagnetic storm and substorm

Mike Lockwood, Mathew J. Owens, Luke A. Barnard, Chris J. Scott, Clare E. Watt, Sarah Bentley

摘要:

利用论文1(arXiv:1708.04904)中给出的磁层功率输入的重建,我们重建了过去400年地磁指数的年平均值,误差在± 20 pc的1-sigma范围内。此外,我们研究的行为的对数正态分布的每日和每小时的值,这些年的平均值,并表明,我们也可以重建的部分地磁活跃(风暴样)天和(亚暴样)小时在每年的精度为50-60 pc。这些结果是首次对道尔顿极小期和蒙德极小期的空间天气条件进行基于物理学的量化。我们预测在未来重复这些极小的地面扰动水平,允许地球的偶极矩减弱。

英文摘要:

Using the reconstruction of power input to the magnetosphere given in Paper 1 (arXiv:1708.04904), we reconstruct annual means of geomagnetic indices over the past 400 years to within a 1-sigma error of +/-20 pc. In addition, we study the behaviour of the lognormal distribution of daily and hourly values about these annual means and show that we can also reconstruct the fraction of geomagnetically-active (storm-like) days and (substorm-like) hours in each year to accuracies of 50-60 pc. The results are the first physics-based quantification of the space weather conditions in both the Dalton and Maunder minima. We predict terrestrial disturbance levels in future repeats of these minima, allowing for the weakening of Earth's dipole moment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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