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In this work the dynamic magnetic field within a tearing-unstablethree-dimensional (3D) current sheet about a magnetic null point is describedin detail. We focus on the evolution of the magnetic null points and flux ropesthat are formed during the tearing process. Generally, we find that bothmagnetic structures are created prolifically within the layer and arenon-trivially related. We examine how nulls are created and annihilated duringbifurcation processes, and describe how they evolve within the current layer.The type of null bifurcation first observed is associated with the formation ofpairs of flux ropes within the current layer. We also find that new nulls formwithin these flux ropes, both following internal reconnection and as adjacentflux ropes interact. The flux ropes exhibit a complex evolution, driven by acombination of ideal kinking and their interaction with the outflow jets fromthe main layer. The finite size of the unstable layer also allows us toconsider the wider effects of flux rope generation. We find that the unstablecurrent layer acts as a source of torsional MHD waves and dynamic braiding ofmagnetic fields. The implications of these results to several areas ofheliophysics are discussed.

Dynamic Topology and Flux Rope Evolution During Non-linear Tearing of 3D Null Point Current Sheets