2018-09-11 14:00 UTC

2018-09-19 23:35 UTC

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Figure 2. Schematic of the FIGAERO inlet (Lopez-Hilfiker et al., 2014, adapted). The greyed out part of the inlet is used for gas-phase measurements and was not utilised in this project.

Figure 3. Route of the Swedish I/BOden during Arctic Ocean 2018(black line), the research cruisewhere all presented data wasgathered. Orange markers and filternumbers represent locations foraerosol sampling. Start and endtimes for the sampling period areshown inside text boxes. Approx. seaice cover on 2018-09-19 is shown asa dashed line (data provided fromthe U.S. National Snow and Ice dataCenter). The map was made byutilising the PlotSvalbard R package(Mikko Vihtakari, 2020).

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Figure 1. Results from analysis of(a) aerosol chemical composition (showncompounds are ionised by I- in FIGAERO-CIMS), where the width of the bars showthe timespan for each sampling periodand orange numbers correspond tosample number (see Figure 3),(b) integrated particle volume forsmaller particles (black dots) and largercoarse mode particles (grey diamonds),(c) gas phase DMS (grey dots representindividual measurements and reddiamonds the mean concentrationduring each aerosol sampling period).

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