Martrat, BelenBelenMartratGrimalt, Joan O.Joan O.GrimaltShackleton, Nicholas J.Nicholas J.Shackletonde Abreu, LuciaLuciade AbreuHutterli, ManuelManuelHutterliStocker, ThomasThomasStocker2024-10-132024-10-132007https://boris-portal.unibe.ch/handle/20.500.12422/98833Centennial climate variability over the last ice age exhibits clear bipolar behavior. High-resolution analyses of marine sediment cores from the Iberian margin trace a number of associated changes simultaneously. Proxies of sea surface temperature and water mass distribution, as well as relative biomarker content, demonstrate that this typical north-south coupling was pervasive for the cold phases of climate during the past 420,000 years. Cold episodes after relatively warm and largely ice-free periods occurred when the predominance of deep water formation changed from northern to southern sources. These results reinforce the connection between rapid climate changes at Mediterranean latitudes and century-to-millennial variability in northern and southern polar regions.enarticle10.48350/2525700024833980004210.1126/science.1139994