Table 2.

Spectral characteristics of the four components obtained by PARAFAC in the study and their comparison with previously identified components.

Component	Coordinate intervals (ex/em) (nm)	Description and source assignment
C1	320/394	Marine humic-like substances (Yamashita et al., 2008)
C2	270 (370)/466	Terrestrial humic substances (Murphy et al., 2008; Stedmon et al., 2003)
C3	280/322	Proteins, tryptophan-like substances including autochthonous protein-like substances (Chen et al., 2003; Stedmon and Markager, 2005a,b)
C4	250/308	Protein, Tyrosine-like substances (Murphy et al., 2011)