Nd isotope composition of sediment cores from the Florida Straits ...

• Main Authors: Xie, Ruifang C, Marcantonio, Franco, Schmidt, Matthew W
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2012
• Subjects: Antarc*; Antarctic; Greenland; Greenland ice core; ice core; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.824908; https://doi.pangaea.de/10.1594/PANGAEA.824908

Understanding intermediate water circulation across the last deglacial is critical in assessing the role of oceanic heat transport associated with Atlantic Meridional Overturning Circulation variability across abrupt climate events. However, the links between intermediate water circulation and abrupt climate events such as the Younger Dryas (YD) and Heinrich Event 1 (H1) are still poorly constrained. Here, we reconstruct changes in Antarctic Intermediate Water (AAIW) circulation in the subtropical North Atlantic over the past 25 kyr by measuring authigenic neodymium isotope ratios in sediments from two sites in the Florida Straits. Our authigenic Nd isotope records suggest that there was little to no penetration of AAIW into the subtropical North Atlantic during the YD and H1. Variations in the northward penetration of AAIW into the Florida Straits documented in our authigenic Nd isotope record are synchronous with multiple climatic archives, including the Greenland ice core d18O record, the Cariaco Basin ... : Supplement to: Xie, Ruifang C; Marcantonio, Franco; Schmidt, Matthew W (2012): Deglacial variability of Antarctic Intermediate Water penetration into the North Atlantic from authigenic neodymium isotope ratios. Paleoceanography, 27(3), PA3221 ...