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Ref. No. [UMCES] CBL 2016-011

ACT VS16-02

14

Table 1.

Dissolved oxygen temperature and salinity challenge trial conditions. For each trial pre and post

measurements of tank temperature (

o

C) and salinity (S) were made with an calibrated SBE26+4M CTD,

equilibrated in well mixed tank for 20 min until stable readings obtained.

Trial ID

Mean

Temperature

o

C

S.D.

Temperature

o

C

Mean

Salinity

PSU

S.D.

Salinity

PSU

Levels of

DO tested

mg/L

Figure

for

PME

L_T15_S00

15.44

0.03

0.00

0.000

0, 2, 5,9,10,14

A

L_T15_S10

15.47

0.01

8.82

0.003

0, 2, 8, 9, 13

B

L_T15_S35

15.39

0.03

34.20

0.009

0,2,6,8,12

C

L_T04_S00

5.40

0.08

0.00

0.000

0,4, 12, 17

D

L_T04_S10

5.30

0.03

8.98

0.009

0, 5, 12, 16

E

L_T04_S35

5.23

0.07

34.77

0.073

0, 4, 10, 14

F

L_T30_S00

30.22

0.03

0.00

0.000

0, 3, 5, 9

G

L_T30_S10

30.51

0.12

9.28

0.036

0, 3, 7, 10

H

L_T30_S35

30.61

0.07

34.43

0.050

0, 2, 6, 9

I

The mean and standard deviation of the differences between the PME miniDOT and

reference measurements for each trial (n = 21 - 40) are presented in Table 2.

Explanations for the

difference between observed and possible comparative observations for the Lab trials are noted in

the respective figure legends. Mean difference among trials ranged from -0.339 to 0.126 mg/L.

There were no consistent trends in instrument accuracy across salinity ranges. There was a

noticeable change in the direction of the offset across temperature ranges with the average offset

equal to -0.23 mg/L for the 4 and 15

o

C trials compared to a mean offset of 0.11 mg/L for the 30

oC trials.

Table 2.

Summary of the mean and standard deviation of offsets between paired PME miniDOT sensor

measures and Winkler reference DO measures during laboratory trials.

Trial ID

Instrument – Winkler DO

mean

s.d.

Observed n

Possible

n

L_T15_S00

-0.339

0.348

28

51

L_T15_S10

-0.291

0.268

21

39

L_T15_S35

-0.087

0.362

38

38

L_T04_S00

-0.201

0.119

39

39

L_T04_S10

-0.164

0.161

36

36

L_T04_S35

-0.336

0.223

37

37

L_T30_S00

0.126

0.081

40

40

L_T30_S10

0.080

0.240

39

39

L_T30_S35

0.109

0.030

40

40