Upper panel: Correlation plot of ratio, R, and C_TC. Bottom panel: Correlation plot of R and C_TW. The ratio, R (C₂₈₀₀/C_L), relates to the atmosphere formation height (Fig. 4). The colors in both plots represent values of logarithm of the I_Simean, according to the color bars on the right side. Two vertical lines separate three different types of CBs (defined by C₂₈₀₀/C_L), which are marked with the numbers “1,” “2,” and “3” at the top of each plot.