Coherent Structures in Decaying Two-Dimensional Turbulence

We revisit the matter of coherent structures, such as vortices, and their role in decaying two-dimensional turbulence. These experiments take place in an electromagnetically forced stratified layer within a square container with no slip boundaries and a linear dissipation with the container bottom. Results relating the energy and enstrophy of the bulk flow with the number and strength of coherent vortices are compared with earlier numerical and experimental work.