Environmental Engineering Reference
In-Depth Information
Fig. 10
Absorption spectra normalized to
a
(290) acquired during polychromatic irradiations for
SRFA (
left panels
) and Delaware Bay water (
right panels
) using a cut-off filter at 320 (
a
,
b
), 360
(
c
,
d
), and 400 nm (
e
,
f
). Insets: spectral irradiance of the source in units of 10
15
photons cm
−
2
s
−
1
nm
−
1
. Note that in the absence of an increase in the S, these spectra would be superimpos-
able regardless of the fitting procedure.
Data source
del Vecchio and Blough (
2002
)
of the water; (9) Physical mixing in the surface mixing zone; (10) Increasing
UV-radiation during ozone hole events; (11) Global warming and (12) Salinity.
These factors are discussed in chapter
“
Photoinduced and Microbial Degradation
4.4 Microbial Degradation of CDOM
Microbial degradation significantly changes the CDOM absorption and spec-
tral slope properties in natural waters (Fig.
1
; Table
1
) (Helms et al.
2008
; Moran
