The interplay between particulate and dissolved neodymium in the Western North Atlantic: First insights and interpretations

• Main Authors: Stichel, T., Kretschmer, Sven, Lambelet, M., Van De Flierdt, T., Rutgers v. d. Loeff, Michiel, Rijkenberg, M. J. A., Gerringa, L. J. A., Baar, H. J. W. de
• Format: Conference Object
• Language: unknown
• Published: 2014
• Subjects: North Atlantic
• Online Access: https://epic.awi.de/id/eprint/39252/; https://hdl.handle.net/10013/epic.46521

Dissolved neodymium (Nd) isotopes (expressed as εNd) have been widely used as a water mass tracer to reconstruct paleo ocean circulation. However, the marine geochemical cycle of Nd is not well understood. Unclear input mechanisms, scarcity of available data, and observed decoupling between dissolved εNd and Nd concentration patterns ([Nd]) are only a few of the unresolved issues. The latter is often referred to as the Nd paradox (e.g. [1]). Here we revisit this paradox with an unprecedented data set on particulate Nd isotope and concentration data from five stations along the Dutch GEOTRACES transect GA02 in the western North and equatorial Atlantic Ocean (cruises 64PE319 and 64PE321 from April to July 2010).