vpr_plot_TS.Rd
TS balloon plot with ROI concentration, sorted by category includes isopycnal line calculations
vpr_plot_TS(x, reference.p = 0, var)
dataframe with temperature, salinity, number of rois (n_roi_bin)
reference pressure (default at 0 for surface)- used to calculate isopycnals
variable on which size of points will be based, eg conc_m3 or n_roi_bin
modified from source: https://github.com/Davidatlarge/ggTS/blob/master/ggTS_DK.R
E. Chisholm