Southern Hemisphere climate variability forced by Northern Hemisphere ice-sheet topography

An Antarctic ice core reveals that, during the last ice age, the topography of Northern Hemisphere ice sheets shifted tropical Pacific convection eastward, increasing climate variability in the high southern latitudes. During glacial maxima, ice covered vast areas of the Northern Hemisphere and had a broad influence across the global climate system. Tyler Jones and colleagues show that climate variability in the Southern Hemisphere was...