Osburn, Del Vecchio, and Boyd
260
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
(a)
(b)
(c)
400
450
500
550
600
Emission wavelength (nm)
400
450
500
550
600
Emission wavelength (nm)
400
450
500
550
600
Emission wavelength (nm)
Relative Fluorescence
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
Relative Fluorescence
Unbleached
Bleached
–10.00
–9.00
–8.00
–7.00
–6.00
–5.00
–4.00
–3.00
–2.00
–1.00
0.00
Differential Emission
Bog
Algae
Unbleached
Bleached
Figure 7.7. The effect of photobleaching on DOM emission spectra (ex370) for two sources of DOM.
(a) Groundwater from a Sphagnum dominated bog. (b) An algae culture. The difference between
unbleached and bleached spectra (c) is also shown.