Lagrangian measurements in two-dimensional turbulence

We present statistical properties of two-dimensional turbulence from the lagrangian perspective. Utilizing experimental measurements from an electromagnetically forced stratified layer, results obtained from classical analysis tools, such as the relative diffusion rate of two particles ({\em i.e.} the $t^3$ Richardson diffusion law), as well as more recent techniques, such as relative position doubling time analysis, are presented and compared. These results will be contrasted with earlier measurements in a similar system to help clarify the interpretation of these earlier results, as well as shed light on mixing properties of two-dimensional turbulence.