Mireille Consalvey PhD Thesis - University of St Andrews

5.3.2. Colne Estuary (U. K. )
Day 1 (5/5/01)
Light conditions (Colne)
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Ambient light fluctuated slightly over the first hour of the study but
increased sharply between 11: 00 to 12: 11 (15 - 85 min), increasing from 142 to
21
1760 Rmol in- s- . This fluctuated with passing clouds and had declined to 445
RMO, M-2 s-1 by 16: 00 (315 min). Dusk was at 19: 40 (535 min) with a
light level
of 50 [tMol M-2 S-I which declined to zero shortly afterwards (Figure 5.6A and
5.7A).
The Hythe: Changes in Fluorescence parameters (Day 1)
5.48, p