31 / 60
Ref. No. [UMCES] CBL 2016-016
ACT VS16-07
31
in figure 2 (top panel). Ambient DO measured by the Troll 9000 ranged from 9.33 to 14.71 mg/L
compared to the range captured by reference samples of 10.249 to 14.007 mg/L. The sharp
excursion between April 8 - 9 was real and was picked up by all instruments and correspondingly
seen in specific conductance and temperature variability across the instrument rack (Fig. 1).
The time series of the difference between instrument and reference DO measurements for
each matched pair (n=118 observations) is given in the bottom panel of figure 2. The average and
standard deviation of the measurement difference over the total deployment w
Figure 1.
Environmental conditions encountered during deployment at the MTU site. Test sensor array deployed at 4.5 m
fixed depth, variation in local water levels indicate active water flow around instruments (
Top Panel
). Variation in specific
conductivity (red) and te perature (green) at d pth of instrument ensor detected by an SBE 26 and two RBR Sol
thermistors (
Middle Panel
). Temperature range determined from max-min tem eratures detected by 4 RBR thermistors
spanning instrument sensor array (
Bottom Panel
).