This release contains all the data required to reproduce the nine figures in the paper Determination of the Coefficient of Diffusivity of Potential Vorticity in a Zonal Channel by V.O. Ivchenko and B. Sinha Figure 1 was plotted using the FERRET package (https://ferret.pmel.noaa.gov/Ferret/) with some additional processing done using fortran Ferret .jnl files used are in subdirectory ferret_jnls along with the fortran programs (.f files) Plot data was generated by the Fine Resolution (FR) model The data for these plots are stored in directory FR_model_output which has its own README file Figures 2, 3, 4, 5 16 7 8 and 9 were plotted using the Matlab package (https://uk.mathworks.com/products/matlab.html) Matlab .m files used are in subdirectory Matlab_programs The data for these Figures are embedded within the plotting programs ~