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Ref. No. [UMCES] CBL 2016-016
ACT VS16-07
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The global response of the Troll 9000 RDO for all nine temperature-salinity trials is shown
in figure J. In general, readings are well correlated across the entire range of DO concentrations
(hypoxic to supraoxic) covering all temperature and salinity ranges tested. A global linear
regression of the instrument versus reference measurements for all trials (n=356; r
2
= 0.99;
p<0.0001) produced a slope of 1.005 and intercept of -0.075.
Figure J.
Concordance of Troll 9000 with Optical DO (sn 51530) oxygen measures paired with discrete
Winkler DO reference samples. In general readings are well correlated across a range of DO concentrations
(hypoxic to supraoxic). Offsets in instrument readings increase at higher DO levels and with salinity.
Dotted line represents perfect agreement between the two measures.