当前位置: X-MOL 学术Sol. Phys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Comparison of Latitude Distribution and Evolution of Even and Odd Sunspot Cycles
Solar Physics ( IF 2.7 ) Pub Date : 2020-03-01 , DOI: 10.1007/s11207-020-01615-1
Jouni Takalo

We study the latitudinal distribution and evolution of sunspot areas of Solar Cycles 12 – 23 (SC12–23) and sunspot groups of Solar Cycles 8 – 23 (SC8–23) for even and odd cycles. The Rician distribution is the best-fit function for both even and odd sunspots group latitudinal occurrence. The mean and variance for even northern/southern butterfly wing sunspots are 14.94/14.76 and 58.62/56.08, respectively, and the mean and variance for odd northern/southern wing sunspots are 15.52/15.58 and 61.77/58.00, respectively. Sunspot groups of even cycle wings are thus at somewhat lower latitudes on average than sunspot groups of the odd cycle wings, i.e. about 0.6 degrees for northern hemisphere wings and 0.8 degrees for southern hemisphere wings. The spatial analysis of sunspot areas between SC12–23 shows that the small sunspots are at lower solar latitudes of the Sun than the large sunspots for both odd and even cycles, and also for both hemispheres. Temporal evolution of sunspot areas shows a lack of large sunspots after four years (exactly between 4.2 – 4.5 years), i.e. about 40% after the start of the cycle, especially for even cycles. This is related to the Gnevyshev gap and is occurring at the time when the evolution of the average sunspot latitudes crosses about 15 degrees. The gap is, however, clearer for even cycles than odd ones. Gnevyshev gap divides the cycle into two disparate parts: the ascending phase/cycle maximum and the declining phase of the sunspot cycle.

中文翻译:

偶数和奇数太阳黑子周期的纬度分布和演化比较

我们研究了太阳活动周期 12 - 23 (SC12-23) 和太阳活动周期 8 - 23 (SC8-23) 太阳黑子群的偶数和奇数周期的纬度分布和演化。Rician 分布是偶数和奇数太阳黑子组纬度发生的最佳拟合函数。偶数北/南蝶翼太阳黑子的平均值和方差分别为 14.94/14.76 和 58.62/56.08,奇数北/南翼太阳黑子的平均值和方差分别为 15.52/15.58 和 61.77/58.00。因此,偶数周期翼的太阳黑子群的平均纬度略低于奇周期翼的太阳黑子群,即北半球翼约 0.6 度,南半球翼约 0.8 度。SC12-23 之间太阳黑子区域的空间分析表明,对于奇数周期和偶数周期以及两个半球,小太阳黑子位于太阳的太阳纬度低于大太阳黑子。太阳黑子区域的时间演化表明,四年后(正好在 4.2-4.5 年之间),即在周期开始后约 40%,尤其是偶数周期,缺少大的太阳黑子。这与 Gnevyshev 差距有关,发生在平均太阳黑子纬度演化约 15 度的时间。然而,偶数周期的差距比奇数周期更清晰。格涅维雪夫间隙将周期分为两个不同的部分:太阳黑子周期的上升阶段/周期最大值和下降阶段。太阳黑子区域的时间演化表明,四年后(正好在 4.2-4.5 年之间),即在周期开始后约 40%,尤其是偶数周期,缺少大的太阳黑子。这与 Gnevyshev 差距有关,发生在平均太阳黑子纬度演化超过 15 度的时间。然而,偶数周期的差距比奇数周期更清晰。格涅维雪夫间隙将周期分为两个不同的部分:太阳黑子周期的上升阶段/周期最大值和下降阶段。太阳黑子区域的时间演化表明,四年后(正好在 4.2-4.5 年之间),即在周期开始后约 40%,尤其是偶数周期,缺少大的太阳黑子。这与 Gnevyshev 差距有关,发生在平均太阳黑子纬度演化约 15 度的时间。然而,偶数周期的差距比奇数周期更清晰。格涅维雪夫间隙将周期分为两个不同的部分:太阳黑子周期的上升阶段/周期最大值和下降阶段。然而,偶数周期的差距比奇数周期更清晰。格涅维雪夫间隙将周期分为两个不同的部分:太阳黑子周期的上升阶段/周期最大值和下降阶段。然而,偶数周期的差距比奇数周期更清晰。格涅维雪夫间隙将周期分为两个不同的部分:太阳黑子周期的上升阶段/周期最大值和下降阶段。
更新日期:2020-03-01
down
wechat
bug