Presentation - National Water Research Institute

4 diel studies in surf zone waters in
July/August 2008 at Crystal Cove State
Beach
Diel cycles in H 2 O 2 obtained for all 4 field
experiments
Overall, studies 1-3 consistent with respect
to overall trends, measured max and min
conc. and relationship between sunlight
and H 2 O 2
Field study 4 different; attributed to
occurring after a major storm with
significant increases in plant wrack and
surf zone turbulence
Maximum conc. of 160-200 nM measured
within 1h of solar noon
Levels dropped at night to 20-40 nM,
consistent with photochemical
production from sunlight