Dependence of polarization degree on ocean (top), land (middle), and cloud (bottom) fractions (in J, H, and K_s bands from left to right). Each polarization degree (P) in Fig. 4 is divided by typical polarization (P_mean: dashed line in Fig. 4) at the phase angle, and then plotted against the ocean, land, or cloud fraction (f_o, f_l, or f_c, respectively). The filled and open plots correspond to observations in the waxing and waning phases, respectively. The dashed lines are regression lines of the form af + b with a correlation coefficient r. The crosses correspond to those in Fig. 4 and were excluded from the linear regression. The fractions was calculated with concentrated weighting.