Fig. 4. Horizontal distribution of DOC concentrations and intensities of fluorescent components. Ordinate shows the DOC concentrations (mg C l1) or fluorescent intensities
normalized as QSU. Abscissa is the sampling station number. The horizontal distributions of (a) DOC concentrations, and fluorescent intensities of (b) S1, (c) S2 and (d) S3 were
shown. Open square, open triangle and filled diamond show the distributions in October and December 2010, and May 2011, respectively. Error bars of the data on DOC
concentrations were range of duplicate samples.We did not show the error bar in the data of fluorescent components, because the PARAFAC analysis was carried out on the average
of duplicate analysis of EEM spectra.