Modeling Neodymium Isotopes in the Ocean Component of the Community Earth System Model (CESM1)

Gu, Sifan; Liu, Zhengyu; Jahn, Alexandra; Rempfer, Johannes; Zhang, Jiaxu; Joos, Fortunat; Rempfer, Johannes (2019). Modeling Neodymium Isotopes in the Ocean Component of the Community Earth System Model (CESM1). Journal of advances in modeling earth systems : JAMES, 11(3), pp. 624-640. American Geophysical Union 10.1029/2018MS001538

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Neodymium (Nd) isotopic composition (εNd) is an important tracer for water mass mixing and the reconstruction of past ocean circulation. To allow for a direct model‐data comparison, we have implemented Nd isotopes in the ocean component of the Community Earth System Model (CESM1.3). The model is able to capture the major features of the observed modern distribution of both εNd and Nd concentrations. Our model provides a useful tool for the interpretation of εNd reconstructions. For example, we show that in an idealized North Atlantic freshwater hosing experiment, εNd changes in the Atlantic are documenting primarily the changes in water mass mixing and are hardly affected by the concomitant and large changes in the marine biological productivity and organic matter fluxes. However, the hosing experiment also shows that the end‐member changes due to the change of ocean circulation can influence the interpretation of εNd in the Atlantic, depending on the location. The implementation of Nd, together with other existing tracers, such as δ¹⁸O, ²³¹Pa/²³⁰Th, δ¹³C, and radiocarbon in the same model, can improve our understanding of past ocean circulation significantly.

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Physics Institute > Climate and Environmental Physics
08 Faculty of Science > Physics Institute

UniBE Contributor:

Joos, Fortunat and Rempfer, Johannes


500 Science > 530 Physics
500 Science > 550 Earth sciences & geology




American Geophysical Union




Fortunat Joos

Date Deposited:

28 Jun 2019 17:51

Last Modified:

05 Dec 2022 15:27

Publisher DOI:





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