Millennial-scale cold reversals in the high latitudes of both hemispheres interrupted the last transition from full glacial to interglacial climate conditions. The presence of the Younger Dryas stadial (~12.9 to ~11.7 kyr ago) is established throughout much of the Northern Hemisphere, but the global timing, nature and extent of the event are not well established. read more Glacier Retreat in New Zealand during the Younger Dryas Stadial – Nature – M. Kaplan, J. Schaefer, G. Denton et al.