HOT-203 CTD Data Processing Report · 2019-01-10 · August 14, 2008 HOT-203 CTD Data Processing...
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August 14, 2008 HOT-203 CTD Data Processing Report (file location: C:\Documents and Settings\Cammy\Application Data\SSH\temp\h203ctdrep.sdw) Paul Lethaby Post-cruise processing of CTD data from the July 25 th to 29 th , 2008 cruise of the Hawaii Ocean Time-series. SUMMARY HOT-203 was conducted aboard the R/V Kilo Moana (KM) from July 25 th to 29 th , 2008. A total of 20 CTD casts were conducted (Fig. 1). The rosette was lowered at 20 – 30 m/min for all casts until the cable tension was sufficient to allow faster speeds. Winds during the cruise were 10 -15 knots from the east for the duration of the cruise. One CTD cast was conducted at KAHE (Station 1) to 1020 dbar. Eighteen CTD casts were conducted at Station ALOHA (Station 2); Casts 1 and 3 were conducted to 200 and 250 dbar respectively. Casts 4 and 17 were near bottom deep casts conducted to 4800 dbar and Cast 18 was an additional deep cast to 3000 dbar, all other casts at ALOHA were to 1020 dbar. One one-hour yo-yo cast to 200 dbar was conducted at Station 50 (WHOTS-5 mooring). Temperature sensors all functioned correctly during the cruise. Salinity from the primary conductivity sensor were slightly noisier when compared with salinity from the secondary conductivity sensor during cast 6 at Station ALOHA. This was probably due to biological fouling and after both sensors were flushed with Triton-X™ following completion of the cast the noise did not persist. Data from the second sensor shall be reported from S2C6. There was a small amount of drift in the secondary oxygen sensor observed between the first and second deep cast. Also below 3500 dbar small spikes were seen in the trace of the primary oxygen sensor. Temperature and salinity were mixed to between 40 and 60 dbar at ALOHA throughout the cruise. The salinity below the mixed layer steadily increased with the salinity maximum located between 140 and 160 dbar. Intrusions were observed in salinity between 80 and 160 dbar. Salinity intrusions were also observed deeper between 450 and 850 dbar throughout the cruise. The salinity minimum of 34.05 was at 500 to 550 dbar. The oxygen mixed layer was also at 40 to 60 dbar with the first subsurface maximum between 50 and 80 dbar. There was a secondary maximum below this between 320 and 360 dbar. The oxygen minimum was at 800 dbar. Observations of the deep water below 4500 dbar (Fig. 6) revealed the cold event first observed during HOT-185 was still present. Potential temperature during the first deep cast was 1.096 °C over the bottom 50 dbar and had not changed by the time of the second deep cast. 1 SENSOR CONFIGURATION A SeaBird 9/11-Plus CTD SN 850 was utilized during HOT-203. The CTD was equipped with dual temperature, conductivity and oxygen sensors to acquire hydrographic data. SBE-3 Plus temperature sensors SN 2454 and SN 4448 were used for all casts. Conductivity sensors SN 2218 and SN 2959 were used for all casts. Oxygen sensors SN 43262 and SN 43982 were used for all casts. The pressure sensor SN 1430 performed correctly throughout the cruise. Rosette configuration included SeaBird carousel SN 0558 which functioned correctly. Fluorometer SN 2840 was used for all casts and functioned correctly. A Satlantic ISUS SN 97 was used for casts 1 – 3 and 4 – 16 at Station ALOHA. Benthos altimeter SN 1219 was used for all casts and functioned adequately from 25-30 m off the bottom, during the deep casts. HOT-203 CTD Data Processing Report Page 1 of 5
Transcript of HOT-203 CTD Data Processing Report · 2019-01-10 · August 14, 2008 HOT-203 CTD Data Processing...
August 14, 2008
HOT-203 CTD Data Processing Report
(file location: C:\Documents and Settings\Cammy\Application Data\SSH\temp\h203ctdrep.sdw)
Paul Lethaby
Post-cruise processing of CTD data from the July 25th to 29th, 2008 cruise of the Hawaii Ocean Time-series.
SUMMARY
HOT-203 was conducted aboard the R/V Kilo Moana (KM) from July 25th to 29th, 2008. A total of 20 CTD casts were
conducted (Fig. 1). The rosette was lowered at 20 – 30 m/min for all casts until the cable tension was sufficient to allow
faster speeds. Winds during the cruise were 10 -15 knots from the east for the duration of the cruise.
One CTD cast was conducted at KAHE (Station 1) to 1020 dbar. Eighteen CTD casts were conducted at Station
ALOHA (Station 2); Casts 1 and 3 were conducted to 200 and 250 dbar respectively. Casts 4 and 17 were near bottom
deep casts conducted to 4800 dbar and Cast 18 was an additional deep cast to 3000 dbar, all other casts at ALOHA were
to 1020 dbar. One one-hour yo-yo cast to 200 dbar was conducted at Station 50 (WHOTS-5 mooring).
Temperature sensors all functioned correctly during the cruise. Salinity from the primary conductivity sensor were
slightly noisier when compared with salinity from the secondary conductivity sensor during cast 6 at Station ALOHA.
This was probably due to biological fouling and after both sensors were flushed with Triton-X™ following completion of
the cast the noise did not persist. Data from the second sensor shall be reported from S2C6. There was a small
amount of drift in the secondary oxygen sensor observed between the first and second deep cast. Also below 3500 dbar
small spikes were seen in the trace of the primary oxygen sensor.
Temperature and salinity were mixed to between 40 and 60 dbar at ALOHA throughout the cruise. The salinity belowthe mixed layer steadily increased with the salinity maximum located between 140 and 160 dbar. Intrusions wereobserved in salinity between 80 and 160 dbar. Salinity intrusions were also observed deeper between 450 and 850 dbarthroughout the cruise. The salinity minimum of 34.05 was at 500 to 550 dbar. The oxygen mixed layer was also at 40 to
60 dbar with the first subsurface maximum between 50 and 80 dbar. There was a secondary maximum below thisbetween 320 and 360 dbar. The oxygen minimum was at 800 dbar.
Observations of the deep water below 4500 dbar (Fig. 6) revealed the cold event first observed during HOT-185 was stillpresent. Potential temperature during the first deep cast was 1.096 °C over the bottom 50 dbar and had not changed bythe time of the second deep cast.
1 SENSOR CONFIGURATION
A SeaBird 9/11-Plus CTD SN 850 was utilized during HOT-203. The CTD was equipped with dual temperature,conductivity and oxygen sensors to acquire hydrographic data. SBE-3 Plus temperature sensors SN 2454 and SN 4448were used for all casts. Conductivity sensors SN 2218 and SN 2959 were used for all casts. Oxygen sensors SN 43262
and SN 43982 were used for all casts. The pressure sensor SN 1430 performed correctly throughout the cruise.
Rosette configuration included SeaBird carousel SN 0558 which functioned correctly. Fluorometer SN 2840 was usedfor all casts and functioned correctly. A Satlantic ISUS SN 97 was used for casts 1 – 3 and 4 – 16 at Station ALOHA.
Benthos altimeter SN 1219 was used for all casts and functioned adequately from 25-30 m off the bottom, during thedeep casts.
HOT-203 CTD Data Processing Report Page 1 of 5
August 14, 2008
2 POST-CRUISE CHANGES
No post-cruise changes were necessary.
3 PROCESSING PARAMETERS
The time lags were calculated between the primary and secondary temperature sensors, as well as between corresponding
temperature and conductivity sensors and are shown in Table 1. The alpha values for the Lueck correction were
calculated for both conductivity sensors and are also shown in Table 1. The lag value between the temperature and
conductivity sensors remain unchanged from the previous cruise. The alpha value for the conductivity sensors also
remain unchanged from the previous cruise.
Table 1. - Lags for primary and secondary temperature and conductivity sensors as well
as alpha values for the Lueck correction
Cruise
No
Sensor SN Lags Alphas
T1 T2 C1 C2 T2-T1 T1-C1 T2-C2 C1 C2
203 2454 4448 2218 2959 0 0 -1 0.028 0.028
202 2454 4448 3162 2959 0 0 -1 0.028 0.028
201 2454 4448 2218 2959 0 1 -2 0.028 0.020
200 2454 4448 2218 2959 0 1 -2 0.020 0.028
199 2454 4448 2218 2959 0 0 -1 0.028 0.028
198 2454 4448 2218 2959 0 1 -2 0.028 0.028
197 2454 4448 2218 3162 0 1 -2 0.028 0.028
196 2454 4448 2218 2959 0 1 -2 0.028 0.028
195j 2454 4448 1178 1176 0 0 -2 0.020 0.028
195i 2454 4448 2218 3162 0 0 -2 0.020 0.028
194h 2454 2907 2218 3162 0 1 -2 0.020 0.020
194g 2454 2907 2959 3162 0 1 -2 0.020 0.028
193f 2454 1416 2959 3162 0 0 -2 0.020 0.020
193e 2454 2907 2959 3162 0 0 -2 0.020 0.020
192d 2454 2242 2959 3162 -1 0 -2 0.020 0.028
192c 2454 4448 2959 3162 0 0 -1 0.020 0.028
191b 2454 4448 2959 3162 0 0 -1 0.020 0.012
191a 2454 2907 2959 3162 0 0 -1 0.020 0.012
190 2454 2907 2959 3162 0 0 -2 0.020 0.020
189 2454 2242 2959 3162 0 0 -1 0.028 0.028
188 2454 4448 2959 3162 0 0 -2 0.020 0.028
187 2454 4448 2959 3162 0 0 -2 0.020 0.028
a Before S2C17 c Before S2C3 e Before S2C3 g Before S2C4 i Before S2C17b After S2C16 d After S2C4 f After S2C4 h After S2C j After S2C16
HOT-203 CTD Data Processing Report Page 2 of 5
August 14, 2008
4 ERRORS
The number of screening errors per cast are listed in Table 2. Of the twenty casts, four were above the 4000 error
threshold used to identify problems with individual casts. The majority of errors during these casts were in temperature
and conductivity differences in the thermocline during the upcast. The cast at Station 50 was a yo-yo cast and a high
number of errors is typically expected.
5 TEMPERATURE SENSOR DIFFERENCES
Temperature differences between the sensors SN 2454 & SN 4448 for all casts at Station ALOHA were obtained from
the 2Hz downcast data files, from which mean and standard deviation values were computed (Fig. 2a and 2b). The mean
difference for the cruise using this sensor configuration was 4.7 x 10-4 °C with a standard deviation of 3.9 x 10-3 °C. The
temperature sensor mean difference and standard deviation for this and previous cruises are shown in Table 3.
Table 3. - Mean temperature sensor pair differences and standard deviations
from casts at station ALOHA.
Cruise No. Ship Mean Difference
( 10-5 °C)
Mean Standard Deviation
( 10-3 °C)
203 KM 46.8 3.90
202 KM 41.8 3.00
201 KM -18.8 3.12
200 KM -16.3 4.82
199 KM 52.9 8.52
198 KM -21.9 5.61
197 KM -76.2 15.20
196 KOK -2.6 4.27
195 KM 2.7 2.96
194 KM 123.8 2.12
193 KM 5.3 1.56
192 KM 175.8 3.38
191 KM 66.8 5.22
190 KOK 103.9 3.36
189 KOK 75.4 5.03
188 KM 10.4 8.13
187 KM 3.6 6.73
KOK: R/V Ka'imikai-O-Kanaloa
KM: R/V Kilo Moana
Examining the ensemble average of all casts (Fig. 2b), the mean difference was approximately -1.5 m°C in the
thermocline region and approximately 1.0 m°C below 800 dbar. The standard deviation above 400 dbar was typically 2m°C in the thermocline with some spikes to 6 m°C.
HOT-203 CTD Data Processing Report Page 3 of 5
August 14, 2008
We suggest reporting data from the first temperature sensor.
6 CONDUCTIVITY SENSOR DIFFERENCES
Conductivity sensors SN 2218 and SN 2959 were used for all casts at Station ALOHA. Conductivity differences
between the sensor pairs used at Station ALOHA were obtained from the 2Hz downcast data files. Conductivity sensors
exhibited a mean difference of -4.1 x 10-4 S/m with a mean standard deviation of 0.40 x 10-3 S/m (Fig. 3a). The
conductivity sensor mean differences and standard deviations for this and previous cruises are shown in Table 4.
Table 4. - Mean Conductivity sensor pair differences and
standard deviations from casts at station ALOHA.
Cruise No. Ship Mean Difference
(10-4 S/m)
Mean Standard Deviation
( 10-4 S/m)
203 KM -4.06 4.04
202 KM -4.68 3.77
201 KM -1.20 3.78
200 KM 0.051 5.61
199 KM -2.11 9.08
198 KM -1.04 5.90
197 KM -9.71 / -1.65* 803.2 / 16.02*
196 KOK -1.05 4.71
195 KM -6.44 3.40
194 KM -6.16 3.93
193 KM 1.27 1.75
192 KM 2.24 4.00
191 KM 1.09 5.20
190 KOK 0.63 3.47
189 KOK -0.61 5.40
188 KM 0.18 8.61
187 KM -0.10 7.83
KOK: R/V Ka'imikai-O-Kanaloa * Excluding cast 8 and 9
KM: R/V Kilo Moana
The depth dependent mean conductivity sensor difference during HOT-203 for casts 1 – 18 was between -7 x 10-4 S/mand -1 x 10-4 S/m (Fig. 3b). Below 1000 dbar the mean difference was less than 3 x 10-4 S/m. The maximum standard
deviation during HOT-203 was less than 2 x 10-4 S/m in the halocline around 250 dbar with some spikes to 6 x 10-4 S/m.
We suggest reporting data from the first conductivity sensor for all casts except cast 6 where we will report datafrom the second conductivity sensor, (See Section 9 below for details).
7 OXYGEN SENSOR DIFFERENCES
SBE-43 Oxygen sensors SN 43262 and SN 43982 were used for all casts during HOT-203. Oxygen sensors differences
were computed for casts 1 – 18 at Station ALOHA. The mean difference between these sensors was 46.09 µmol/kg with a
HOT-203 CTD Data Processing Report Page 4 of 5
August 14, 2008
mean standard deviation of 12.43 µmol/kg (Fig. 4a). The difference between sensors in µmol/kg is high and due to the
sensor SN 43982. The oxygen current plots (Fig. 4b(i) and (ii)) as well as the figure of the deep casts (Fig. 4c) indicate a
very slight drift in the second sensor which will be monitored during the next cruise. The comparison with oxygen
samples will correct for the shift in calibration used when the data were collected. During both deep casts small spikes in
the primary oxygen trace were observed below 3500 dbar. These spikes are small and this will be monitored closely
during the next cruise.
We suggest reporting data from the first oxygen sensor.
8 CTD SURFACE PRESSURE BEFORE AND AFTER CASTS
Figure 5 shows the surface CTD pressure recorded by the CTD operator before and after each cast. Surface CTD
pressures give an indication of the stability of the pressure sensor during the cruise. The mean before-cast pressure and
the mean after-cast pressure was 0.06 dbar and 0.03 dbar respectively giving mean hysteresis value of 0.03 dbar.
Hysteresis measured during HOT-203 is comparable to other HOT cruises and is within the normal range according to
Nordeen Larson (see HOT-111 CTD Data Processing Report).
9 INDIVIDUAL CAST PLOTS
Plots were made to show the temperature, salinity, and dissolved oxygen profiles for each cast at stations 1, 2 and 50
from the 2Hz data files. The first set of plots corresponds to the data from the first sensor set, followed by the plots fromthe second sensor set.
During the cruise it was noted that primary salinity was noisier than secondary salinity during cast 6 at ALOHA. Thiswas most likely due to biological fouling within the TC-duct. After completion of cast 6 the sensors were flushed with
Triton-X and subsequent casts did not exhibit any noisiness in the primary salinity trace. Data from the secondary
sensor will be reported for this cast.
Temperature and salinity were mixed to between 40 and 60 dbar at ALOHA throughout the cruise. The salinity belowthe mixed layer steadily increased with the salinity maximum located between 140 and 160 dbar. Intrusions wereobserved in salinity between 80 and 160 dbar. Salinity intrusions were also observed deeper between 450 and 850 dbarthroughout the cruise. The salinity minimum of 34.05 was at 500 to 550 dbar. The oxygen mixed layer was also at 40 to60 dbar with the first subsurface maximum between 50 and 80 dbar. There was a secondary maximum below thisbetween 320 and 360 dbar. The oxygen minimum was at 800 dbar.
Observations of the deep water below 4500 dbar (Fig. 6) revealed the cold event first observed during HOT-185 was stillpresent. Potential temperature during the first deep cast was 1.096 °C over the bottom 50 dbar and had not changed by
the time of the second deep cast.
HOT-203 CTD Data Processing Report Page 5 of 5
HOT−203 Cast Coordinates
22 40
22 50
158 10 158 00 157 50
Latit
ude
(N)
Longitude (W)
123456
7
89 10
11121314
15
16 17
18
157.9157.92157.94157.96157.98158158.0222.75
22.76
22.77
22.78
22.79
ALOHA
50
Longitude (W)
Latit
ude
(N)
HOT−203 Station Coordinates
Error Table HOT-203
-------------------
S C Mod P T1 C1 PT T2 C2 OC1 OT1 OC2 OT2 Xm Fl dT dC dOC dOT Total
-----------------------------------------------------------------------------------------
s1c 1 0 0 13 0 0 26 114 0 0 0 0 0 89 1955 1996 0 0 4193
s2c 1 0 0 26 0 0 23 162 0 0 0 0 0 54 818 1429 0 0 2512
s2c 2 0 0 1 0 0 8 95 0 0 0 0 0 28 1203 1306 0 0 2641
s2c 3 0 0 8 0 0 13 148 0 0 0 0 0 2 673 973 0 0 1817
s2c 4 0 0 3 0 0 12 126 0 0 0 0 0 16 899 1405 0 0 2461
s2c 5 0 0 7 0 0 8 129 0 0 0 0 0 57 1371 1275 0 0 2847
s2c 6 0 0 23 0 0 28 124 0 0 0 0 0 115 1290 1369 0 0 2949
s2c 7 0 0 15 0 0 10 125 0 0 0 0 0 55 1405 1346 0 0 2956
s2c 8 0 0 12 0 0 36 193 0 0 0 0 0 42 1607 1791 0 0 3681
s2c 9 0 0 4 0 0 8 187 0 0 0 0 0 20 1417 1488 0 0 3124
s2c10 0 0 13 0 0 17 137 0 0 0 0 0 15 1168 1419 0 0 2769
s2c11 0 0 6 0 0 19 172 0 0 0 0 0 23 1326 1474 0 0 3020
s2c12 0 0 8 0 0 10 137 0 0 0 0 0 23 1212 1516 0 0 2906
s2c13 0 0 13 0 0 26 489 0 0 0 0 0 116 1336 2021 0 0 4001
s2c14 0 0 9 0 0 18 142 0 0 0 0 0 118 1459 1552 0 0 3298
s2c15 0 0 13 0 0 19 166 0 0 0 0 0 31 1763 2243 0 0 4235
s2c16 0 0 12 0 0 24 121 0 0 0 0 0 2 1403 1404 0 0 2966
s2c17 0 0 2 0 0 21 187 0 0 0 0 0 6 1513 1571 0 0 3300
s2c18 0 0 7 0 0 18 128 0 0 0 0 0 80 1535 1598 0 0 3366
s50c1 0 0 13 0 0 38 151 0 0 0 0 0 61 2052 1715 0 0 4030
02
46
810
1214
1618
−1
−0.5 0
0.5 1
1.5x 10
−3
HO
T−
203 Mean S
econdary−P
rimary T
emperature at A
LOH
A. M
ean = 0.00046799 oC
Cast
Temperature
02
46
810
1214
1618
1 2 3 4 5 6 7 8x 10
−3
Standard deviation S
econdary−P
rimary T
emperature. M
ean = 0.0038992 oC
Cast
Temperature (degC)
02
46
810
1214
1618
−5000
−4000
−3000
−2000
−1000 0
Maxim
um pressure
Cast
Pressure (dbar)
31Jul08 11:28
−4 −2 0 2
x 10−3
−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
−500
0HOT−203, Mean Ts−Tp
Temperature (degC)
Pre
ssur
e (d
bar)
0 2 4 6 8
x 10−3
−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
−500
0St. Dev. Ts−Tp
Temperature (degC)
Pre
ssur
e (d
bar)
0 5 10 15 20−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
−500
0Number of points per bin
Data points
Pre
ssur
e (d
bar)
31Jul08 11:28
02
46
810
1214
1618
−5
−4
−3
−2
−1
x 10−
4H
OT
−203 M
ean Secondary−
Prim
ary Conductivity at A
LOH
A. M
ean = −
0.00040551 S/m
Cast
Conductivity (S/m)
02
46
810
1214
1618
0 2 4 6 8x 10
−4
Standard deviation S
econdary−P
rimary C
onductivity. Mean =
0.00040382 S/m
Cast
Conductivity (S/m)
02
46
810
1214
1618
−5000
−4000
−3000
−2000
−1000 0
Maxim
um pressure
Cast
Pressure (dbar)
31Jul08 11:28
−8 −6 −4 −2 0
x 10−4
−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
−500
0HOT−203, Mean Cs−Cp
Conductivity (S/m)
Pre
ssur
e (d
bar)
0 2 4 6
x 10−4
−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
−500
0St. Dev. Cs−Cp
Conductivity (S/m)
Pre
ssur
e (d
bar)
0 5 10 15 20−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
−500
0Number of points per bin
Data points
Pre
ssur
e (d
bar)
31Jul08 11:28
0 2 4 6 8 10 12 14 16 1840
42
44
46
48
50
52
54
56
58
60
Cast No. (ALOHA station)
Oxy
gen
(µm
ol/k
g)HOT−203 Mean CTD oxygen differences, SN 43982−43262. Mean = 46.0944 µmol/kg
0 2 4 6 8 10 12 14 16 182
4
6
8
10
12
14
16
Cast No. (ALOHA station)
Oxy
gen
(µm
ol/k
g)
Standard Deviation CTD oxygen differences, SN 43982−43262. Mean SD = 12.4323 µmol/kg
0 0.5 1 1.5 2 2.5 3 3.5 4−1200
−1000
−800
−600
−400
−200
0HOT−203 First Oxygen Sensor (#43262)
Oxygen Current
Pre
ssur
e (d
bar)
0 0.5 1 1.5 2 2.5 3 3.5 4−1200
−1000
−800
−600
−400
−200
0HOT−203 Second Oxygen Sensor (#43982)
Oxygen Current
Pre
ssur
e (d
bar)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
−500
0HOT−203 First Oxygen Sensor (#43262)
Oxygen Current
Pre
ssur
e (d
bar)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
−500
0HOT−203 Second Oxygen Sensor (#43982)
Oxygen Current
Pre
ssur
e (d
bar)
20 40 60 80 100 120 140 160 180 200−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
Dissolved Oxygen (µmol/kg)
Pre
ssur
e (d
bar)
HOT−203 Deep casts. Oxygen sensor 43262
Mean difference: 4.3272 µmol/kg
First deep castSecond deep cast
20 40 60 80 100 120 140 160 180 200−5000
−4500
−4000
−3500
−3000
−2500
−2000
−1500
−1000
Dissolved Oxygen (µmol/kg)
Pre
ssur
e (d
bar)
HOT−203 Deep casts. Oxygen sensor 43982
Mean difference: 7.9849 µmol/kg
First deep castSecond deep cast
−0.2
−0.15
−0.1
−0.05
0
0.05
0.1
0.15
0.2
Sur
face
pre
ssur
e (d
bar)
HOT−203 Surface Pressure before (o), and after (x) cast
1,1 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 2,10 2,11 2,12 2,13 2,14 2,15 2,16 2,17 2,18 50,1
Mean before−cast pressure: 0.06215 dbarMean after−cast pressure: 0.03335 dbar
1.085 1.09 1.095 1.1 1.105 1.11 1.115−4850
−4800
−4750
−4700
−4650
−4600
−4550
−4500
178
Potential Temperature (°C)
Pre
ssur
e (d
bar)
2006/07 Cold event
179
180182’182’ 183’183’184’185186186’
187187’
188188’ 189189’190
190’191191’
192193 193’ 194194’
195195’
196196’197
197’198198’
199199’200
200’201201’
202202’
203c4203c17
0 5 10 15 20 25−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 1
Temperature [C]
Pre
ssur
e [d
bar]
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.6−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 1
Salinity [psu]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25 30 35 40 45−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 2
Temperature [C]
Pre
ssur
e [d
bar]
34 34.5 35 35.5 36 36.5 37−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 2
Salinity [psu]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Stations 3−50
Temperature [C]
Pre
ssur
e [d
bar]
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.6−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Stations 3−50
Salinity [psu]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 1
Secondary Temperature [C]
Pre
ssur
e [d
bar]
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.6 35.8−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 1
Secondary Salinity [psu]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25 30 35 40 45−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 2
Secondary Temperature [C]
Pre
ssur
e [d
bar]
34 34.5 35 35.5 36 36.5 37 37.5−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 2
Secondary Salinity [psu]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Stations 3−50
Secondary Temperature [C]
Pre
ssur
e [d
bar]
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.6 35.8−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Stations 3−50
Secondary Salinity [psu]
Pre
ssur
e [d
bar]
30Jul08 15:35
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.60
5
10
15
20
25
30HOT−203 Station 1
Salinity [psu]
Pot
entia
l Tem
pera
ture
[C]
34.2 34.3 34.4 34.5 34.6 34.7 34.81
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Station 1
Salinity [psu]
Pot
entia
l Tem
pera
ture
[C]
30Jul08 15:35
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.60
5
10
15
20
25
30HOT−203 Station 2
Salinity [psu]
Pot
entia
l Tem
pera
ture
[C]
34.2 34.3 34.4 34.5 34.6 34.7 34.81
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Station 2
Salinity [psu]
Pot
entia
l Tem
pera
ture
[C]
30Jul08 15:35
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.60
5
10
15
20
25
30HOT−203 Stations 3−50
Salinity [psu]
Pot
entia
l Tem
pera
ture
[C]
34.2 34.3 34.4 34.5 34.6 34.7 34.81
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Stations 3−50
Salinity [psu]
Pot
entia
l Tem
pera
ture
[C]
30Jul08 15:35
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.60
5
10
15
20
25
30HOT−203 Station 1
Secondary Salinity [psu]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
34.2 34.3 34.4 34.5 34.6 34.7 34.81
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Station 1
Secondary Salinity [psu]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
30Jul08 15:35
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.60
5
10
15
20
25
30HOT−203 Station 2
Secondary Salinity [psu]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
34.2 34.3 34.4 34.5 34.6 34.7 34.81
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Station 2
Secondary Salinity [psu]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
30Jul08 15:35
34 34.2 34.4 34.6 34.8 35 35.2 35.4 35.60
5
10
15
20
25
30HOT−203 Stations 3−50
Secondary Salinity [psu]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
34.2 34.3 34.4 34.5 34.6 34.7 34.81
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Stations 3−50
Secondary Salinity [psu]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
30Jul08 15:35
0 5 10 15 20 25−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 1
Temperature [C]
Pre
ssur
e [d
bar]
0 1 2 3 4 5 6−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 1
Oxygen [ml/l]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25 30 35 40 45−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 2
Temperature [C]
Pre
ssur
e [d
bar]
0 1 2 3 4 5 6 7 8 9 10−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 2
Oxygen [ml/l]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Stations 3−50
Temperature [C]
Pre
ssur
e [d
bar]
0 1 2 3 4 5 6−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Stations 3−50
Oxygen [ml/l]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 1
Secondary Temperature [C]
Pre
ssur
e [d
bar]
0 1 2 3 4 5 6−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 1
Secondary Oxygen [ml/l]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25 30 35 40 45−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 2
Secondary Temperature [C]
Pre
ssur
e [d
bar]
0 1 2 3 4 5 6 7 8 9 10−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Station 2
Secondary Oxygen [ml/l]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 5 10 15 20 25−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Stations 3−50
Secondary Temperature [C]
Pre
ssur
e [d
bar]
0 1 2 3 4 5 6−1100
−1000
−900
−800
−700
−600
−500
−400
−300
−200
−100
0HOT−203 Stations 3−50
Secondary Oxygen [ml/l]
Pre
ssur
e [d
bar]
30Jul08 15:35
0 1 2 3 4 5 60
5
10
15
20
25
30HOT−203 Station 1
Oxygen [ml/l]
Pot
entia
l Tem
pera
ture
[C]
0 0.5 1 1.5 2 2.5 3 3.5 41
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Station 1
Oxygen [ml/l]
Pot
entia
l Tem
pera
ture
[C]
30Jul08 15:35
0 1 2 3 4 5 60
5
10
15
20
25
30HOT−203 Station 2
Oxygen [ml/l]
Pot
entia
l Tem
pera
ture
[C]
0 0.5 1 1.5 2 2.5 3 3.5 41
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Station 2
Oxygen [ml/l]
Pot
entia
l Tem
pera
ture
[C]
30Jul08 15:35
0 1 2 3 4 5 60
5
10
15
20
25
30HOT−203 Stations 3−50
Oxygen [ml/l]
Pot
entia
l Tem
pera
ture
[C]
0 0.5 1 1.5 2 2.5 3 3.5 41
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Stations 3−50
Oxygen [ml/l]
Pot
entia
l Tem
pera
ture
[C]
30Jul08 15:35
0 1 2 3 4 5 60
5
10
15
20
25
30HOT−203 Station 1
Secondary Oxygen [ml/l]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
0 0.5 1 1.5 2 2.5 3 3.5 41
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Station 1
Secondary Oxygen [ml/l]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
30Jul08 15:35
0 1 2 3 4 5 60
5
10
15
20
25
30HOT−203 Station 2
Secondary Oxygen [ml/l]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
0 0.5 1 1.5 2 2.5 3 3.5 41
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Station 2
Secondary Oxygen [ml/l]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
30Jul08 15:35
0 1 2 3 4 5 60
5
10
15
20
25
30HOT−203 Stations 3−50
Secondary Oxygen [ml/l]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
0 0.5 1 1.5 2 2.5 3 3.5 41
1.5
2
2.5
3
3.5
4
4.5
5HOT−203 Stations 3−50
Secondary Oxygen [ml/l]
Sec
onda
ry P
oten
tial T
empe
ratu
re [C
]
30Jul08 15:35
