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. 2015 Apr 28;5:9845. doi: 10.1038/srep09845

Figure 7. Comparison plots of humification index (HIX) versus (a) fluorescence index (FI) and (b) biological index (BIX) for the Arctic aerosol WSOC (red circles), together with different types of dissolved organic matter (DOM) that are adapted from Birdwell and Engel14,59, Birdwell and Valsaraj60, Huguet et al.61, Mladenov et al.53, Salve et al.62, Tedetti et al.15, and Wickland et al.63.

Figure 7

The shaded regions represent mixed DOM signatures.