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. 2020 Jun 26;8(7):nwaa144. doi: 10.1093/nsr/nwaa144

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© The Author(s) 2020. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 4. — DFe fluxes and dust-particle concentrations recorded in the NEEM ice core, Fe fluxes from the Lingtai and Xifeng loess profiles, paleoproductivity represented by the variations of MAR_OC in the H3571 core from the North Pacific Ocean and atmospheric CO₂ recorded in Antarctica ice cores over 110 kyr BP. (A) CO₂ concentration in the Antarctic ice cores from https://www.ncdc.noaa.gov/data-access/paleoclimatology-data; (B) the NEEM dust-particle concentration (this study); (C) the NEEM DFe flux (this study); (D) Fe flux in the Lingtai loess [42]; (E) H3571 MAR_OC [44]. Magenta dotted lines mark low CO₂ concentrations, which coincide with high Fe fluxes.