"Spiral wave-traveling clustering" intermittency and 1/f-noise in a 2D coupled map lattice

Intermittency of checkerboard spiral waves and traveling clusterings origin ating from sudden shrinking of the strange attractor of the 2D CML in the n eighborhood of the saddle-node bifurcation boundary is found. A power-law p robability density for lifetimes in the spiral wave (laminar) phase is obse rved, while in the checkerboard clusterings (bursting) phase the above quan tity exhibits an exponential decay. This difference can be interpreted thro ugh the self-organized behavior of the spiral waves, and the passive relaxa tion of the disordered checkerboard clusterings.