The correlation scale and the Taylor scale are evaluated for interplanetary magnetic field fluctuations from two-point, single time correlation function using the Advanced Composition Explorer (ACE), Wind, and Cluster spacecraft data during the time period from 2001 to 2017, which covers over an entire solar cycle. The correlation scale and the Taylor scale are respectively compared with the sunspot number to investigate the effects of solar activity on the structure of the plasma turbulence. Our studies show that the Taylor scale increases with the increasing sunspot number, which indicates that the Taylor scale is positively correlated with the energy cascade rate, and the correlation coefficient between the sunspot number and the Taylor scale is 0.92. However, these results are not consistent with the traditional knowledge in hydrodynamic dissipation theories. One possible explanation is that in the solar wind, the fluid approximation fails at the spatial scales near the diss...

中文翻译：

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太阳活动对太阳风磁涨落中泰勒尺度和相关尺度的影响

使用Advanced Composition Explorer（ACE），Wind和Cluster航天器数据，从2001年至2017年的时间范围内，利用两点单次相关函数评估了相关标度和泰勒标度的行星际磁场波动，涵盖了整个太阳周期。将相关量表和泰勒量表分别与太阳黑子数进行比较，以研究太阳活动对等离子体湍流结构的影响。我们的研究表明，泰勒尺度随着太阳黑子数的增加而增加，这表明泰勒尺度与能量级联速率成正相关，黑子数与泰勒尺度的相关系数为0.92。然而，这些结果与流体动力耗散理论中的传统知识不一致。一种可能的解释是，在太阳风中，流体近似在diss附近的空间尺度上失效。