Panel (A) shows the distribution of CH lifetimes with latitude. We also show reference lines of constant rotational period (27.8 days and multiples thereof—blue dashed lines) and those illustrating multiples of rotational period with latitude (red dashed lines) as of Snodgrass & Ulrich (1990). Panel (B) collapses the distribution of CH lifetimes into a histogram with the 27.8-day rotational period, and multiples, shown as blue dashed lines. Panel (C) shows the distribution of relative CH velocities where the dots are colored to indicate CH lifetime. The horizontal red dashed line is drawn at velocity of 56 m s⁻¹. Panel (D) collapses the CH velocities into a single histogram (black thick line), in addition to that short-lived (<60 days) and long-lived (>60 days) CH velocities are shown as blue and red lines, respectively.