Eccentricity modulates the MS signal in the Cape Basin. The highest dominance of the filtered MS record is coincident with the highest dominance of the filtered eccentricity record (Fig. F7B) but not of the highest dominance of the filtered obliquity record (Fig. F7A). Although variations in obliquity are thought to control the onset of Northern Hemisphere glaciation, it is equally likely that variations in insolation at the eccentricity periodicity played an important role. Northern Hemisphere variation at the obliquity periodicity may influence the region but may be obscured by antiphase Southern Hemisphere paleoceanographic responses. Thus, it is not possible to separate the signal using only MS data, and a multiproxy approach is necessary to separate Northern and Southern Hemisphere components of the signal.