Table 1.
Initial composition of filtered sample.
Fig 1.
Spectral distribution of irradiation at intensity 700 W m-2 inside the irradiation chamber and inside the Teflon tube.
Fig 2.
Scheme of possible transformations of organic matter during exposure to irradiation.
DOC–dissolved organic carbon, POC–particulate organic carbon, DIC–dissolved inorganic carbon; kDOC→DIC, k*DOC→POC, and kPOC→DIC are rate constants of corresponding transformation pathways.
Table 2.
Modeled initial concentrations, and individual transformation pathway rate constants at different temperatures ± standard errors.
Fig 3.
Changes in DOC concentration during irradiation experiments at different temperatures.
L.T.–laboratory temperature, approximately 23°C.
Fig 4.
Changes in DOC, POC, and DIC concentrations during irradiation.
A–at 25°C; B–at 9°C. Points represent measured data. Solid lines represent modeled trends.
Fig 5.
Changes in pH during irradiation experiments at different temperatures.