Evolution of different parameters in the bubble and plumes. a1,b1 and c1,d1: variations of different SDO/AIA normalized intensities by exposure duration, EM in the red box of Fig. 5a1, projected areas, and the height for the first large plume. a2,b2 and c2,d2: variations of different SDO/AIA normalized intensities by exposure duration, EM in the red box of Fig. 5b1, projected areas, and the height for the second large plume. The blue vertical dashed line denotes the onset of instability in the bubble top for each large plume. The horizontal dotted lines in panels a1,b1 and a2,b2 denote the corresponding average normalized intensity of background at different wavelengths. The uncertainties in panels c1,c2 are derived directly from the errors of Figs. 5c1,d1 estimated by the Monte-Carlo experiment.