20 | Cruise Report, RV ATAIR, Cruise 0671021-1, Bremerhaven - Thyboron —- Aberdeen, 18 Jul - 10 Aug 2023

values of 5-6 ml/l, this threshold corresponds to 0.055 mI/l. Without correction, the average
difference of the oxygen data is 0.0967 ml, Le. greater than 1%; with correction, it is well
below 1%. CTD oxygen was corrected according to:

Deorr (MI/I) = -0.888808751227 + 0.003882681122 * time + 0.021469570016 * oxygen (ml/l) +
-0.000104482816 * pressure + 0.002460619138 * temperature

Oxygen saturation was recalculated afterwards. The corrected CTD-derived oxygen data was
given the quality flag 1 (good data). Any quality control of fluorescence and turbidity data was
not performed. Thus, the respective data were made available with flag 0 (no quality control
applied).

STABILE:

AT

“x U] 911

AyQll

II

Stahdard deviatıör

amples „3
ifferences < #/-andard
 deviatio
OD mearf

AUTOSAL - TSC1

Number of data pairs 1
percentage

Mean difference

Median difference

Standard deviation

JE

.0.004*

-0.0015

0.0358

“5

rl

99 5%

0.0016

-0.0014

0.0079

1C5

824%

-0.0006

-0.0009

0.0036

AUTOSAL —- TSC2

Number of data pairs
percentage
Mean difference

Pr

175

-0.0030

—
Median difference -0.0010

Standard deviation

0 02361

123

98%

-0.0007

-0 0010

00072

161

82%

-0.0005

-0.0010

0 00392

Table 5.3. Results of the comparison between bottle salinity samples obtained from salinometer measurements
 (AUTOSAL) and conductivity/salinity recordings at the time of closing the Niskin bottles, the
latter obtained from the two CTD sensor packs (TSC1 and TSC2).