Fig. 3: Records for glacial climate between 40 and 26 ka BP.
From: Antarctic evidence for an abrupt northward shift of the Southern Hemisphere westerlies at 32 ka BP
a North Greenland Ice Core Project (NGRIP) δ18O (a proxy for Greenland temperature)2, b WAIS Divide Ice Core (WDC) CO223, c Southern Ocean (SO) Opal flux (a proxy for SO upwelling)9, d Lake Kai Iwi Sr/Ca (a proxy for aeolian sediments)50, e Lake Laguna Potrok Aike k51 (a proxy for wind-derived dust), f RICE ssNa+ (a proxy for Ross Sea open-ocean area) (this study), g RICE δD (a proxy for temperature)19, h RICE nssCa2+ (a proxy for Southern Hemisphere Westerly Wind (SHWW) position)20, i) Integrated summer insolation curve57. Yellow dashed lines indicate the timing of the proposed SHWW migration at 32 ka BP. Lake Laguna Potrok Aike record is interpolated over 10-yrs and smoothed using a 500-yr window and the abrupt change is at 31±2 ka.
