Fig. 4: Reconstructed isotope composition variability of Nd, Pb and U in seawater from the North Atlantic. | Nature Communications

Fig. 4: Reconstructed isotope composition variability of Nd, Pb and U in seawater from the North Atlantic.

From: Glacial–interglacial Nd isotope variability of North Atlantic Deep Water modulated by North American ice sheet

Fig. 4: Reconstructed isotope composition variability of Nd, Pb and U in seawater from the North Atlantic.The alternative text for this image may have been generated using AI.

a Authigenic εNd based on foraminifera from our study (with 2σ error) and sediment leachates from two Blake Ridge cores (with their 2σ errors represented by the black error bar)17. b Authigenic 206Pb/204Pb based on sediment leachates from the two Blake Ridge cores36, with error bars smaller than the symbols. For a and b, the data in each core for the interval that are most likely influenced by sediment redistribution17 are connected by a dashed line. c Reconstructed δ234U of the upper (0.7–2.1 km) tropical North Atlantic, with the mean value shown as a solid line and 2σ error as dashed lines45. YD: Younger Dryas; BA: Bølling–Allerød; HS1: Heinrich Stadial 1; LGM: Last Glacial Maximum. Black arrows in this figure denote potential influences of weathering fluxes related to NAIS deglaciation: the increased subglacial melting and detritus discharge during HS1 and the enhanced chemical weathering of the Canadian Shield in the early Holocene.

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