Presentation - National Water Research Institute

Net photochemical production rate of H 2 O 2 between
low morning levels at 08:30 and maximum at 16:00,
estimated from initial and final concentrations to be
49 nM h -1 , is on the high end of 2-10 nM h -1 reported
for surface seawater and 17-56 nM h -1 in estuarine
and coastal waters
Substantial dynamic short-term variability in H 2 O 2
concentrations on the time-scale of min
› attribute this to variability in surf-zone waters as water
parcels are transported into and out of the sampling site
by long-shore and rip currents. Physical properties showed
the same short-term variability
Note that ave a(300) was 1.4 ± 0.5 m -1 , relatively low
value consistent with smaller CDOM pool relative to
the previous studies in estuarine/near-shore waters
with large terrestrial riverine inputs.