9.2 Overlapping Bands: Clashing Helicity

Wednesday, 9 January 2019: 11:00 AM
North 227A-C (Phoenix Convention Center - West and North Buildings)
Scott McIntosh, NCAR, Boulder, CO; and R. J. Leamon

Recent work has revealed a phenomenological picture of the how the ~11 yr sunspot cycle of the Sun arises. The production and destruction of sunspots is a consequence of the latitudinal-temporal overlap and interaction of the toroidal magnetic flux systems that belong to the 22 yr solar magnetic activity cycle and are rooted deep in the Sun's convective interior. We present a conceptually simple extension of this work, presenting a hypothesis on how complex active regions can form as a direct consequence of the intra- and extra-hemispheric interaction taking place in the solar interior. Furthermore, during specific portions of the sunspot cycle, we anticipate that those complex active regions may be particularly susceptible to profoundly catastrophic breakdown, producing flares and coronal mass ejections of the most severe magnitude. These significant events would then happen naturally in the very deep declining phase of sunspot cycles - at times when they are least unexpected, based on the currently held picture of solar activity.
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