Fig. 1: Nd isotope records from the western North Atlantic for the last glacial cycle.

a Authigenic (circle = sediment leachate; square = foraminifera) and detrital (triangle) ɛNd records from Baffin Island Shelf (BIS, 2674 m depth, green), Orphan Knoll (OK/Site U1302, ~3500 m depth, purple), Bermuda Rise (BR/Site 1063, ~4550 m depth, pink), and Blake Bahama Outer Ridge (BBOR/Site JPC12, ~4250 m depth, red). BIS leachates, and BIS and OK foraminifera and detrital data from69; OK leachates from70; BR foraminifera data from5; BR detrital data from48; BBOR leachates from23; and BBOR detrital data from71. Error bars represent two standard deviations (2 SD). The gray bars correspond to cold periods of Younger Dryas (YD) and Heinrich Stadials 1 (H1) and 2 (H2). The blue bar on the y-axis shows values of modern lower NADW17. b Location map of core sites, the Labrador Sea (LS), the Deep Western Boundary Current (DWBC), the sample transect in SW Greenland (fuchsia rectangle), and the cross section for Fig. 6 (black line). Map data ©2015 Google.