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Ref. No. [UMCES] CBL 2016-011

ACT VS16-02

17

Figure B.

Response of the PME miniDOT (sn 7392-340698) to changing dissolved oxygen

concentrations at 15.4

o

C and S=8.82.

Top Panel

: Time series of instrument readings and Winkler

reference samples drawn at level of sensor foil in well-mixed test tanks. The large offsets for the

final two concentrations are suspected to indicate bubbles from the sparging gas being trapped on

sensor foil and contaminating the measurement.

Bottom Panel

: Corresponding offset between

instrument reading and Winkler DO reference sample during exposure trial. Dotted line represents

zero offset from reference. Offsets beyond +/- 2 mg/L are excluded for clarity