The Trigger Mechanism of Solar Flares in a Coronal Arcade with Reversed Magnetic Shear

This cartoon is based upon numerical experiments with an arcade of opposite shear, and the paper argues that this can lead to an eruption via an series of two independent reconnection processes. To this observer it sounds akin to "breakout," but the paper does not cite Antiochos so maybe not. The basic theory uses the idea the idea that a neutralization of the coronal helicity in a given volume (arcade of loops) may lead to an explosive energy release. This interesting idea should be considered in the context of contemporaneously trendy thinking that associates CME eruptions with helicity as contrasted with the energy buildup needed for flare occurrence.

      As noted by B.C. Low in particular, this may help to regulate the solar dynamo's incessant helicity creation.