A Nightingale Rose Chart (Coxcomb Chart or Polar Area Diagram) is a combination of the Radar Chart and Stacked Column Chart. It is helpful when working with cyclic data (months, seasons, years, etc.) and with statistical data. Meteorologists use it to illustrate a wind rose.
A Percent Stacked Area Chart is a multi-series Area Chart, where the height of each series depends on its contribution to the sum of all values in a certain category (X-axis). It is helpful in showing the variation of a few variables and their percentage ratio.