During the 2000 cruises two developmental versions of the Sea-Bird SBE-43 oxygen sensor were used (#43071 and #43081). These sensors were calibrated at Sea-Bird before each cruise. In addition, two YSI Inc. probes (#13434 and #13251) were used. Sensor #13434 had its membrane and electrolyte replaced prior to HOT-114.

     Three sets of parameters were obtained per HOT cruise, corresponding to the casts at Stations 1, 2 and 8. Casts from HA-8A were calibrated with bottle data obtained during that cruise.

     Table 4.12 gives the means and standard deviations for the final calibrated CTD oxygen minus water sample values. Dual sensors were used during cruises, but only the sensor whose data were deemed more reliable is included.

Table 4.12a: CTD-Bottle dissolved oxygen per cruise at Station Kahe (µmol kg-1)

 

 

 

0 to 1500 dbar

Cruise

Sensor

Mean

SD

HOT-111

43071

0.01

1.30

HOT-112

13434

0.01

1.20

HOT-113

43071

0.02

1.54

HOT-114

13434

0.02

0.97

HOT-115

43081

0.00

0.62

HOT-116

43081

0.00

1.32

HOT-117

43081

0.00

0.96

HOT-118

43081

0.00

1.05

HOT-119

43081

0.00

0.28

HOT-120

13434

0.01

1.13

HOT-121

13434

0.01

0.70

Table 4.12b: CTD-Bottle dissolved oxygen per cruise at Station ALOHA (µmol kg-1)

 

 

 

0 to 4800 dbar

500 to 4800 dbar

Cruise

Sensor

Mean

SD

Mean

SD

HOT-111

43071

0.09

1.18

0.13

1.07

HOT-112

13434

0.07

0.98

0.15

0.81

HOT-113

43071

0.13

1.25

0.18

1.03

HOT-114

43081

0.01

0.80

-0.02

0.77

HOT-115

43081

0.09

0.83

0.11

0.75

HOT-116

43081

0.01

0.81

-0.02

0.69

HOT-117

43081

0.09

0.85

0.10

0.76

HOT-118

43081

0.01

0.83

-0.01

0.78

HOT-119

43081

0.02

0.95

0.00

0.86

HOT-120

13434

0.04

1.13

0.01

1.21

HOT-121

13434

0.04

1.03

0.02

1.09

Table 4.12: CTD-Bottle dissolved oxygen at Station HALE-ALOHA (µmol kg-1)

 

 

 

0-1500 dbar

Cruise

Sensor

Mean

SD

HA-8A

43081

0.00

0.95

HOT-117

43081

-0.06

0.96

HOT-118

43081

0.00

0.27

HOT-119

43081

0.00

0.83

HOT-120

13434

0.00

0.58

HOT-121

13434

0.00

0.49

     Figure 4.13 shows the CTD oxygen data quality for every 2-dbar bin in each cast at Station ALOHA for cruises 111 through 121.


Figure 4.13. CTD oxygen data quality per cast (vertical bars) and per 2-dbar bin at Station ALOHA during HOT cruises 111 through 120. The tick marks along the x-axis separate different casts. Casts from the same cruise are separated by vertical black lines.

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