Extended Data Fig. 9: Increased AAIW mixing at the intermediate North Atlantic at the Bølling onset.
From: Millennial and centennial CO2 release from the Southern Ocean during the last deglaciation
a, Core locations against modern seawater salinity15. b, Pa/Th, a proxy for NADW strength33. c, εNd at 26 JPC [discrete and connected circles are based on fish teeth and Fe-Mn leachates, respectively111,112]. Grey and light blue shadings and blue circles are defined in Extended Data Fig. 7. εNd at 26JPC was well within the range of NSW values (grey shading) during HS1, but shifted towards SSW values (light blue shading) at the Bølling onset. This is consistent with a northward expansion of AAIW at the Bølling onset41,42,43,110. Vertical grey and light blue bars along y-axis indicate modern NSW and SSW endmembers, respectively.
