Neodymium isotopes in the ocean model of the Community Earth System Model (CESM1.3)
- 1Department of Atmospheric and Oceanic Sciences and Center for Climate Research, University of Wisconsin-Madison, Madison, 53705, USA
- 2Department for Atmospheric and Oceanic Sciences and Institude of Arctic and Alpine Research, University of Colorado Boulder, Boulder, 80309, USA
- 3Climate and Environmental Physics, Physics Institute and Oeschger Center for Climate Change Research, University of Bern, Bern, CH-3012, Switzerland
- 1Department of Atmospheric and Oceanic Sciences and Center for Climate Research, University of Wisconsin-Madison, Madison, 53705, USA
- 2Department for Atmospheric and Oceanic Sciences and Institude of Arctic and Alpine Research, University of Colorado Boulder, Boulder, 80309, USA
- 3Climate and Environmental Physics, Physics Institute and Oeschger Center for Climate Change Research, University of Bern, Bern, CH-3012, Switzerland
Abstract. Neodymium (Nd) isotope ratio (εNd) is a quasi-conservative water mass tracer and has been used increasingly as paleoclimate proxy to indicate the past evolution of ocean circulation. However, there are many uncertainties in interpreting εNd reconstructions. For the purposes of direct comparison between climate models and proxy reconstructions, we implement Nd isotopes (143Nd and 144Nd) in the ocean model of the Community Earth System Model (CESM). Two versions of Nd tracers are implemented: one is the "abiotic" Nd in which the particle fields are prescribed as the particle climatology generated by the marine ecosystem module of the CESM under present day forcing; the other is the "biotic" Nd that is coupled with the marine ecosystem module. Under present day climate forcing, our model is able to simulate both Nd concentrations and εNd in good agreement with available observations. Also, Nd concentration and εNd in our model show similar sensitivities to the total boundary source and the ratio between particle related Nd and dissolved Nd as in previous modeling study (Rempfer et al., 2011). Therefore, our Nd-enabled ocean model provides a promising tool to study past changes in ocean and climate.
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Sifan Gu et al.


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RC1: 'Review of « Neodymium isotopes in the ocean model of the Community Earth System Model (CESM1.3) »', Anonymous Referee #1, 07 Apr 2017
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AC1: 'Author Comment, reply to Reviewer #1', Sifan Gu, 21 Apr 2017
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AC1: 'Author Comment, reply to Reviewer #1', Sifan Gu, 21 Apr 2017
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RC2: 'Comment on "Neodymium isotopes in the ocean model of the Community Earth System Model (CESM1.3)"', Anonymous Referee #2, 14 Apr 2017
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AC2: 'Author Comment, reply to Reviewer #2', Sifan Gu, 21 Apr 2017
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AC2: 'Author Comment, reply to Reviewer #2', Sifan Gu, 21 Apr 2017
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EC1: 'Summary and decision', Guy Munhoven, 16 May 2017


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RC1: 'Review of « Neodymium isotopes in the ocean model of the Community Earth System Model (CESM1.3) »', Anonymous Referee #1, 07 Apr 2017
-
AC1: 'Author Comment, reply to Reviewer #1', Sifan Gu, 21 Apr 2017
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AC1: 'Author Comment, reply to Reviewer #1', Sifan Gu, 21 Apr 2017
-
RC2: 'Comment on "Neodymium isotopes in the ocean model of the Community Earth System Model (CESM1.3)"', Anonymous Referee #2, 14 Apr 2017
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AC2: 'Author Comment, reply to Reviewer #2', Sifan Gu, 21 Apr 2017
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AC2: 'Author Comment, reply to Reviewer #2', Sifan Gu, 21 Apr 2017
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EC1: 'Summary and decision', Guy Munhoven, 16 May 2017
Sifan Gu et al.
Sifan Gu et al.
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