ctd data (salinity and temperature at depth)

CTD Data (Salinity and CTD Data (Salinity and Temperature at Depth)Temperature at Depth)

Devon Kelly Devon Kelly University of North Carolina at WilmingtonUniversity of North Carolina at Wilmington

CHM 576 CHM 576 20102010

Sampling Sites and Cruise DatesSampling Sites and Cruise Dates

M18M18 M23M23 M35M35 M42M42 M54M54 M61M61 Horseshoe Bend (HB)Horseshoe Bend (HB) Cruise 1 (Sept. 13Cruise 1 (Sept. 13thth, ,

2010)2010) Cruise 2 (Nov. 8Cruise 2 (Nov. 8thth, 2010), 2010)

http://www.uncw.edu/cms/aquaticecology/laboratory/LCFRP/lcfrp%20station%20map.htm

Instrumentation and MeasurementsInstrumentation and Measurements

Instrument: Seabird SBE 25

w/External Probes SBE 32 H2o Bottle

Carousel & SBE 33 Real Time Deck Unit

Measurements: Pressure Salinity Temperature pH (not used) Oxygen Saturation (not

used)

http://www.uncw.edu/cms/capefear/tech/SB25CTD.htm

SpecificationsSpecifications

Salinity accuracy: 0.003 resolution 0.0004 at 10Salinity accuracy: 0.003 resolution 0.0004 at 10 ooC (Could vary with temperature.)C (Could vary with temperature.)

Temperature range: -5 to +35 Temperature range: -5 to +35 ooCC Temperature accuracy: ± 0.002 Temperature accuracy: ± 0.002 ooCC Pressure range: 0-680 decibarsPressure range: 0-680 decibars Pressure accuracy: Pressure accuracy: 0.1% of the full scale or 0.68 0.1% of the full scale or 0.68

decibars.decibars. Instrument was sent for factory calibration in Instrument was sent for factory calibration in

between cruises.between cruises.

Cruise 1: Sept. 13Cruise 1: Sept. 13thth, 2010, 2010

M18M23

M35M42

M54M61

HB

Surface

Deep

0

5

10

15

20

25

30

35

40

Salinity

Station

Cruise 1 Salinity

Surface

Deep

M18M23

M35M42

M54M61

HB

Surface

Deep

24

24.5

25

25.5

26

26.5

27

27.5

28

28.5

Temperature (C)

Station

Cruise 1 Temperature

Surface

Deep

Cruise 2: Nov. 8Cruise 2: Nov. 8thth, 2010, 2010

M18M23

M35M42

M54M61

HB

Surface

Deep

0

5

10

15

20

25

30

35

Salinity

Station

Cruise 2 Salinity

Surface

Deep

M18M23

M35M42

M54M61

HB

Surface

Deep

14.5

15

15.5

16

16.5

17

17.5

18

Station

Temperature (C)

Cruise 2 Temperature

Surface

Deep

Comparison of Cruise 1 Salinity: Comparison of Cruise 1 Salinity: 2009 and 20102009 and 2010

Comparison Cruise 1 Salinity 2009 and 2010

0

5

10

15

20

25

30

35

40

M18 M23 M35 M42 M54 M61 HB

Station

Sa

linit

y

Cruise 1 Surface 2010

Cruise 1 Deep 2010


Cruise 1 Deep 2009

Comparison of Cruise 1 Comparison of Cruise 1 Temperature: 2009 and 2010Temperature: 2009 and 2010

Comparison Cruise 1 Temperature 2009 and 2010

23.5

24

24.5

25

25.5

26

26.5

27

27.5

28

28.5

M18 M23 M35 M42 M54 M61 HB

Station

Te

mp

era

ture

(C

)


Cruise 1 Deep 2010


Cruise 1 Deep 2009

Comparison of Cruise 2 Salinity: Comparison of Cruise 2 Salinity: 2009 and 20102009 and 2010

Comparison Cruise 2 Salinity 2009 and 2010

0

5

10

15

20

25

30

35

40

M18 M23 M35 M42 M54 M61 HB

Station

Sa

linit

y


Cruise 2 Deep 2010


Cruise 2 Deep 2009

Comparison of Cruise 2 Comparison of Cruise 2 Temperature: 2009 and 2010Temperature: 2009 and 2010

Comparison Cruise 2 Temperature 2009 and 2010

0

5

10

15

20

25

M18 M23 M35 M42 M54 M61 HB

Station

Te

mp

era

ture

(C

)


Cruise 2 Deep 2010


Cruise 2 Deep 2009

Cruise 1 Salinity Cruise 1 Salinity Depth vs Salinity

0

2

4

6

8

10

12

20 22 24 26 28 30 32 34 36 38

Salinity

Dep

th (m

)

M54

M42

M35

M23

M18

Cruise 2 SalinityCruise 2 SalinityDepth vs Salinity

0

2

4

6

8

10

12

14

16

5 10 15 20 25 30 35

Salinity

Dep

th (m

)

HB

M61

M54

M42

M35

M23

M18

Cruise 1 TemperatureCruise 1 TemperatureDepth vs Temperature

0

2

4

6

8

10

12

14

25 25.5 26 26.5 27 27.5 28 28.5

Temperature (C)

Dept

h (m

)

HB

M61

M54

M42

M35

M23

M18

Cruise 2 TemperatureCruise 2 TemperatureDepth vs Temperature

0

2

4

6

8

10

12

14

16

15.5 16 16.5 17 17.5 18

Temperature (C)

Dept

h (m

)

HB

M61

M54

M42

M35

M23

M18

Cruise 1 Temp vs SalinityCruise 1 Temp vs SalinityCruise 1 Temp vs Salinity

M18

M23

M35

M42

M54

M18

M23

M35M42M54

27

27.2

27.4

27.6

27.8

28

28.2

20 22 24 26 28 30 32 34 36 38

Salinity

Tem

pera

ture

(C)

Surface

Deep

Cruise 2 Temp vs SalinityCruise 2 Temp vs SalinityCruise 2 Temp vs Salinity

M18

M23

M35

M42

M54

M61

HB

M18

M23

M35

M42M61

HB

M54

15.5

16

16.5

17

17.5

18

0 5 10 15 20 25 30 35 40

Salinity

Tem

pera

ture

(C)

Surface

Deep

Cruise 1 SalinityCruise 1 Salinity

M18 M23 M35 M42 M54

Deep

Surface

Cruise 1 Salinity

35-40

30-35

25-30

20-25

15-20

10-15

5-10

0-5

Cruise 2 SalinityCruise 2 Salinity

M18 M23 M35 M42 M54 M61 HB

Deep

Surface

Cruise 2 Salinity

30-35

25-30

20-25

15-20

10-15

5-10

0-5

ConclusionsConclusions

Salinity levels were higher in Cruise 1 this year Salinity levels were higher in Cruise 1 this year than last year. (Lack of rain.)than last year. (Lack of rain.)

Temperature was significantly higher than last Temperature was significantly higher than last year in Cruise1.year in Cruise1.

Cruise 2 showed similar results in salinity levels, Cruise 2 showed similar results in salinity levels, but temperature was slightly lower.but temperature was slightly lower.

Cruise 1 showed well mixed profiles with a very Cruise 1 showed well mixed profiles with a very slight salt wedge at M35.slight salt wedge at M35.

Cruise 2 showed a definite salt wedge between Cruise 2 showed a definite salt wedge between M54 and M61.M54 and M61.

ctd data (salinity and temperature at depth)

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