“…The first is that many Southern Hemisphere climate proxies, including Antarctic temperature records, suggest glacial-interglacial climate change occurred broadly in-phase between the Southern and Northern Hemispheres, despite covariance of summer insolation (Mercer, 1984;Jouzel et al, 2007;Wolff et al, 2010a;Huybers & Denton, 2008). Secondly, glacial activity prior to the gLGM, as observed in our compiled chronology, is at odds with a model in which conditions suited to maximum ice growth occurred during the gLGM (Barrows et al, 2007a;Wolff et al, 2009;Doughty et al, 2015). One explanation is that, for the Southern Hemisphere, the duration of seasons may exert a greater control on climate than insolation intensity (Huybers & Denton, 2008).…”