Articles | Volume 10, issue 12
Geosci. Model Dev., 10, 4723–4742, 2017
https://doi.org/10.5194/gmd-10-4723-2017
Geosci. Model Dev., 10, 4723–4742, 2017
https://doi.org/10.5194/gmd-10-4723-2017

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.