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. 2018 Jun 28;25(23):22499–22528. doi: 10.1007/s11356-018-2625-7

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© The Author(s) 2018

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 8 — Σ₁₃PCB concentrations (pg/L) (dissolved and particle-bound) in the surface waters (polar mixed layer) of the Arctic Ocean. The colour key indicates the research campaign; the numbers on the bars are station numbers. The concentration key is at the upper left. Please note the figure is reproduced from Carrizo and Gustafsson (2011b)