Distribution of the excitation temperature derived from ¹²CO (1–0) (first column), ¹³CO (1–0) opacity (second column), H₂ column density (third column) derived from ¹³CO (1–0) of the three clouds. Corresponding molecular clouds and physical properties are given in the upper left corner of each panel. The color bar of the first column represents the excitation temperature in units of K. The color bar of the second column represents the ¹³CO (1–0) opacity. The color bar of the third column represents the H₂ column density in units of cm^-2.