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. 2018 Feb 13;41(6):1197–1216. doi: 10.1007/s00300-018-2278-5

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© The Author(s) 2018

Open AccessThis 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. 7 — a Differences in in situ (living cells) versus in vitro (pigment extracts) [Chl a] at ice station (St) 1–3. These differences may mainly be due to quenching of Chl a fluorescence due to PQ and NPQ in living cells. Numbers in parentheses indicate ± SE, n = 3 for lab-based in vitro measurements. b In situ [Chl a] from repetitive AUV vertical zig-zag transects at ice station 3 (see also Fig. 5) compared to corresponding ship based vertical [Chl a] profile (mean of downcast and upcast in nearby ice-lead)