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. 2018 Jun 20;8:9405. doi: 10.1038/s41598-018-27705-6

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Vertical profiles of the upper 60 m of the water column on the Canadian side (Stn 101) and Greenland side (Stn 115) of the North Water. Upper panels) attenuation of photosynthetically available radiation (PAR), nitrate concentration (in µM), and water density (σ_t in kg m⁻³). Lower panels) phosphate and nitrite concentrations (in µM), and chlorophyll fluorescence (Chl in arbitrary units). The single dotted line for PAR attenuation was from T₂ for Stn 101 and from T₃ for Stn 115. Central solid lines are the average of 7 profiles (time T₁ to T₇), with exterior dotted lines showing the standard error.