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Ref. No. [UMCES] CBL 2015-011
ACT VS15-04
33
Figure 12.
Time series of pH measured by the Troll 9500 pH sensor during the 3 month HIMB trial.
Top
Panel
: Continuous pH
NBS
recordings from instrument (blue line) and pH
Total
of adjacent grab samples
determined by mCP dye (red circles).
Bottom Panel
: Difference in measured pH relative to reference
samples (Instrument – Dye Ref) observed during deployment. Dashed line represents offset (ca 0.13)
predicted due to difference in pH
NBS
and pH
Total
scales used by the Troll pH sensor and the dye reference
method.