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Volume 10, issue 12 | Copyright
Geosci. Model Dev., 10, 4723-4742, 2017
https://doi.org/10.5194/gmd-10-4723-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Model description paper 22 Dec 2017

Model description paper | 22 Dec 2017

231Pa and 230Th in the ocean model of the Community Earth System Model (CESM1.3)

Sifan Gu and Zhengyu Liu
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Revised manuscript not accepted
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Cited articles
Anderson, R. F., Bacon, M. P., and Brewer, P. G.: Removal of 230Th and 231Pa from the open ocean, Earth Planet. Sc. Lett., 62, 7–23, https://doi.org/10.1016/0012-821X(83)90067-5, 1983.
Anderson, R. F., Lao, Y., Broecker, W. S., Trumbore, S. E., Hofmann, H. J., and Wolfli, W.: Boundary scavenging in the Pacific Ocean: A comparison of 10Be and 231Pa, Earth Planet. Sc. Lett., 96, 287–304, https://doi.org/10.1016/j.cognition.2008.05.007, 1990.
Anderson, R. F., Fleisher, M. Q., Biscaye, P. E., Kumar, N., Dittrich, B., Kubik, P., and Suter, M.: Anomalous boundary scavenging in the Middle Atlantic Bight: evidence from 230Th, 231Pa, 10Be and 210Pb, Deep-Sea Res. Pt. II, 41, 537–561, https://doi.org/10.1016/0967-0645(94)90034-5, 1994.
Armstrong, R. A., Lee, C., Hedges, J. I., Honjo, S., and Wakeham, S. G.: A new, mechanistic model for organic carbon fluxes in the ocean based on the quantitative association of POC with ballast minerals, Deep-Sea Res. Pt. II, 49, 219–236, https://doi.org/10.1016/S0967-0645(01)00101-1, 2002.
Arsouze, T., Dutay, J.-C., Lacan, F., and Jeandel, C.: Reconstructing the Nd oceanic cycle using a coupled dynamical – biogeochemical model, Biogeosciences, 6, 2829–2846, https://doi.org/10.5194/bg-6-2829-2009, 2009.
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Short summary
Both biotic 231Pa and 230Th and abiotic 231Pa and 230Th have been implemented in the ocean model of CESM. Under present-day climate forcing, our model is able to simulate water column 231Pa and 230Th activity and the sediment 231Pa-to-230Th activity ratio in good agreement with observations. In HOSING experiments, the biotic and abiotic sediment 231Pa-to-230Th activity ratios behave similarly over large areas of low productivity, but can differ substantially in some regions of high productivity.
Both biotic 231Pa and 230Th and abiotic 231Pa and 230Th have been implemented in the ocean model...
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