Same as Figure 3, but for Run B: k _f/ k ₁ = 3, Re = 9, Re _M = 90, and Sh = 0.5. In this case, c = 1.04η _t0 k ₁. The vertical bars in the first panel denote the time interval over which the functions in the other three panels are averaged. Note also that after u _rms k _f t ≈ 7800 the dominant dynamo mode changes and the field becomes x dependent.