Authigenic neodymium isotopic composition from sediment core KNR197-10 GGC17 ...
The notion of a shallow northern sourced intermediate water mass is a well evidenced feature of the Atlantic circulation scheme of the Last Glacial Maximum (LGM). However, recent observations from stable carbon isotopes (δ13C) at the Corner Rise in the deep northwest Atlantic suggested a significant...
| Main Authors: | , , , , |
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| Format: | Dataset |
| Language: | English |
| Published: |
PANGAEA
2018
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.891281 https://doi.pangaea.de/10.1594/PANGAEA.891281 |
| Summary: | The notion of a shallow northern sourced intermediate water mass is a well evidenced feature of the Atlantic circulation scheme of the Last Glacial Maximum (LGM). However, recent observations from stable carbon isotopes (δ13C) at the Corner Rise in the deep northwest Atlantic suggested a significant contribution of a Northern Component Water mass to the abyssal northwest Atlantic basin that has not been described before. Here we test the hypothesis of this northern sourced water mass underlying the southern sourced glacial Antarctic Bottom Water by measuring the authigenic neodymium (Nd) isotopic composition from the same sediments from 5,010‐m water depth. Neodymium isotopes act as a semiconservative water mass tracer capable of distinguishing between Northern and Southern Component Waters at the northwest Atlantic. Our new Nd isotopic record resolves various water mass changes from the LGM to the early Holocene in agreement with existing Nd‐based reconstructions from across the west Atlantic Ocean. ... : Supplement to: Pöppelmeier, Frerk; Gutjahr, Marcus; Blaser, Patrick; Keigwin, Lloyd D; Lippold, Jörg (2018): Origin of Abyssal NW Atlantic Water Masses Since the Last Glacial Maximum. Paleoceanography and Paleoclimatology, 33(5), 530-543 ... |
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