Global evolution of the protoplanetary disk as a function of time, where t = 0 represents the epoch of sink (i.e., protostellar) formation. The quantities shown are the protostellar mass (solid lines in panel a), disk mass (dotted lines in panel a), disk radius (solid lines in panel b), disk semimajor axis (dotted lines in panel b), and apparent disk eccentricity (c). The disk semimajor axis and apparent eccentricity are inferred from an elliptical fit. The blue (red) curve corresponds to the 1 M_⊙ (3 M_⊙) run R1 (R2). The shaded regions in panel (d) represent temporal fluctuations in the measurement, and the solid line is an average value.