3 papers
astro-ph.SR2026
The recent anomalously weak polar field does not imply a weak field at solar cycle 25 minimum
Zi-Fan Wang, Jie Jiang, Yukun Luo +3
The ongoing solar cycle 25 has progressed past its peak of sunspot numbers, being stronger than the previous cycle 24. However, the present polar field is rather weak compared to p…
astro-ph.SR2025
Observation-Based Iterative Map for Solar Cycles. II. The Gnevyshev-Ohl Rule and its Generation Mechanism
Zi-Fan Wang, Jie Jiang, Jing-Xiu Wang
The Gnevyshev-Ohl (G-O) rule, or even-odd effect, is an important observational phenomenon in solar cycles, originally suggesting that even-numbered cycles are typically followed b…
astro-ph.SR2025
Observation-Based Iterative Map for Solar Cycles. I. Nature of Solar Cycle Variability
Zi-Fan Wang, Jie Jiang, Jing-Xiu Wang
Inter-cycle variations in the series of 11-year solar activity cycles have a significant impact on both the space environment and climate. Whether solar cycle variability is domina…