Time series of ice-derived POC (%iPOC_w) in seawater. Time series of water column iPOCw as a proportion of total organic carbon (%iPOC_w) from 18 May to 8 July 216 at the sampling location in Baffin Bay (Figure 2). Data were interpolated and plotted using Ocean Data View v4.7.8 (Schlitzer, 2016). Data were not available (n/a) for interpolation between 25 May and 6 June. DOI: https://doi.org/10.1525/elementa.377.f6