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Metadata Report for BODC Series Reference Number 1723342


Metadata Summary

Data Description

Data Category CTD or STD cast
Instrument Type
NameCategories
Sea-Bird SBE 43 Dissolved Oxygen Sensor  dissolved gas sensors
Sea-Bird SBE 911plus CTD  CTD; water temperature sensor; salinity sensor
WETLabs ECO BB(RT)D Scattering Meter  optical backscatter sensors
Benthos PSA-916T Sonar Altimeter  altimeters
Paroscientific 410K Pressure Transducer  water temperature sensor; water pressure sensors
Sea-Bird SBE 3plus (SBE 3P) temperature sensor  water temperature sensor
Sea-Bird SBE 4C conductivity sensor  salinity sensor
Chelsea Technologies Group Aquatracka III fluorometer  fluorometers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Dr Penny Holliday
Originating Organization National Oceanography Centre, Southampton
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) NOCS National Capability
 

Data Identifiers

Originator's Identifier CTD_DY031_060_2DB
BODC Series Reference 1723342
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2015-06-13 21:28
End Time (yyyy-mm-dd hh:mm) 2015-06-13 22:15
Nominal Cycle Interval 2.0 decibars
 

Spatial Co-ordinates

Latitude 57.14950 N ( 57° 9.0' N )
Longitude 9.69950 W ( 9° 42.0' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth 0.99 m
Maximum Sensor or Sampling Depth 1916.23 m
Minimum Sensor or Sampling Height 4.76 m
Maximum Sensor or Sampling Height 1920.01 m
Sea Floor Depth 1921.0 m
Sea Floor Depth Source CTDDATA
Sensor or Sampling Distribution Variable common depth - All sensors are grouped effectively at the same depth, but this depth varies significantly during the series
Sensor or Sampling Depth Datum Approximate - Depth is only approximate
Sea Floor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
 

Parameters

BODC CODERankUnitsTitle
ACYCAA011DimensionlessSequence number
AHSFZZ011MetresHeight (spatial coordinate) relative to bed surface in the water body
BB117R021per metre per nanometre per steradianAttenuation due to backscatter (650 nm wavelength at 117 degree incidence) by the water body [particulate >unknown phase] by in-situ optical backscatter measurement
CNDCST011Siemens per metreElectrical conductivity of the water body by CTD
CPHLPM011Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >unknown phase] by in-situ chlorophyll fluorometer and manufacturer's calibration applied
DEPHPRST1MetresDepth (spatial coordinate) of sampling event start relative to water surface in the water body by profiling pressure sensor and conversion to depth using unspecified algorithm
DOXYSC011Micromoles per litreConcentration of oxygen {O2 CAS 7782-44-7} per unit volume of the water body [dissolved plus reactive particulate phase] by Sea-Bird SBE 43 sensor and calibration against sample data
OXYSZZ011PercentSaturation of oxygen {O2 CAS 7782-44-7} in the water body [dissolved plus reactive particulate phase]
POPTDR011PercentTransmittance (red light wavelength) per 25cm of the water body by 25cm path length red light transmissometer
POTMCV011Degrees CelsiusPotential temperature of the water body by computation using UNESCO 1983 algorithm
PRESPR011DecibarsPressure (spatial coordinate) exerted by the water body by profiling pressure sensor and correction to read zero at sea level
PSALST011DimensionlessPractical salinity of the water body by CTD and computation using UNESCO 1983 algorithm
SIGTPR011Kilograms per cubic metreSigma-theta of the water body by CTD and computation from salinity and potential temperature using UNESCO algorithm
TEMPST011Degrees CelsiusTemperature of the water body by CTD or STD
TOKGPR011Litres per kilogramConversion factor (volume to mass) for the water body by CTD and computation of density (in-situ potential temperature surface pressure) reciprocal from pressure, temperature and salinity

Definition of Rank

  • Rank 1 is a one-dimensional parameter
  • Rank 2 is a two-dimensional parameter
  • Rank 0 is a one-dimensional parameter describing the second dimension of a two-dimensional parameter (e.g. bin depths for moored ADCP data)

Problem Reports

No Problem Report Found in the Database


Data Access Policy

Open Data supplied by Natural Environment Research Council (NERC)

You must always use the following attribution statement to acknowledge the source of the information: "Contains data supplied by Natural Environment Research Council."


Narrative Documents

Sea-Bird Dissolved Oxygen Sensor SBE 43 and SBE 43F

The SBE 43 is a dissolved oxygen sensor designed for marine applications. It incorporates a high-performance Clark polarographic membrane with a pump that continuously plumbs water through it, preventing algal growth and the development of anoxic conditions when the sensor is taking measurements.

Two configurations are available: SBE 43 produces a voltage output and can be incorporated with any Sea-Bird CTD that accepts input from a 0-5 volt auxiliary sensor, while the SBE 43F produces a frequency output and can be integrated with an SBE 52-MP (Moored Profiler CTD) or used for OEM applications. The specifications below are common to both.

Specifications

Housing Plastic or titanium
Membrane

0.5 mil- fast response, typical for profile applications

1 mil- slower response, typical for moored applications

Depth rating

600 m (plastic) or 7000 m (titanium)

10500 m titanium housing available on request

Measurement range 120% of surface saturation
Initial accuracy 2% of saturation
Typical stability 0.5% per 1000 h

Further details can be found in the manufacturer's specification sheet.

Benthos Programmable Sonar Altimeter (PSA) 916 and 916T

The PSA 916 is a submersible altimeter that uses the travel time of an acoustic signal to determine the distance of the instrument from a target surface. It provides the user with high resolution altitude or range data while simultaneously outputting data through a digital serial port. A wide beam angle provides for reliable and accurate range measurements under the most severe operational conditions. The instrument is electronically isolated to eliminate any potential signal interference with host instrument sensors. The PSA 916 is an upgrade of the PSA 900.

The standard model (PSA 916) has an operational depth range of 0 - 6000 m, while the titanium PSA 916T has a depth range of 0 - 10000 m. All other specifications for the two versions are the same.

Specifications

Transmit frequency 200 kHz
Transmit pulse width 250 µs
Beam pattern 14° conical
Pulse repetition rate

internal selection: 5 pps

external selection: up to 5 pps- user controlled

Range

100 m full scale

1.0 m guaranteed minimum

0.8 m typical

Range

1 cm for RS232 output

2.5 cm for analog output

Operating depth 6000 m (PSA 916) or 10000 m (PSA 916T)

Further details can be found in the manufacturer's specification sheets for the PSA 916 and the PSA 916T.

Instrument Description

CTD Unit and Auxillary Sensors

A Sea-Bird 11plus CTD system used on cruise DY031. This was mounted on a 24-way stainless steel rosette frame, equipped with 24 10-litre Niskin bottles. The CTD was fitted with the following scientific sensors:

Sensor Serial Number Last calibration date Comments
Primary Temperature SBE-3P 4116 3rd July 2014 -
Secondary Temperature SBE-3P 4381 3rd October 2014 -
Primary Conductivity SBE-4C 3529 10th April 2014 -
Secondary Conductivity SBE-4C 4065 8thJuly 2014 -
Benthos PSA-916T Sonar Altimeter 59493 25th March 2013 -
Sea-Bird SBE 43 dissolved oxygen sensor 0363 22nd July 2014 -
Chelsea Alphatracka MKII transmissometer 161048 24th July 2012 -
Chelsea Aquatracka MKIII fluorometer 88-2615-124 21st January 2015 -
WETLabs light scattering sensor 1055 13 March 2013 -

Sea-Bird Electronics SBE 911 and SBE 917 series CTD profilers

The SBE 911 and SBE 917 series of conductivity-temperature-depth (CTD) units are used to collect hydrographic profiles, including temperature, conductivity and pressure as standard. Each profiler consists of an underwater unit and deck unit or SEARAM. Auxiliary sensors, such as fluorometers, dissolved oxygen sensors and transmissometers, and carousel water samplers are commonly added to the underwater unit.

Underwater unit

The CTD underwater unit (SBE 9 or SBE 9 plus) comprises a protective cage (usually with a carousel water sampler), including a main pressure housing containing power supplies, acquisition electronics, telemetry circuitry, and a suite of modular sensors. The original SBE 9 incorporated Sea-Bird's standard modular SBE 3 temperature sensor and SBE 4 conductivity sensor, and a Paroscientific Digiquartz pressure sensor. The conductivity cell was connected to a pump-fed plastic tubing circuit that could include auxiliary sensors. Each SBE 9 unit was custom built to individual specification. The SBE 9 was replaced in 1997 by an off-the-shelf version, termed the SBE 9 plus, that incorporated the SBE 3 plus (or SBE 3P) temperature sensor, SBE 4C conductivity sensor and a Paroscientific Digiquartz pressure sensor. Sensors could be connected to a pump-fed plastic tubing circuit or stand-alone.

Temperature, conductivity and pressure sensors

The conductivity, temperature, and pressure sensors supplied with Sea-Bird CTD systems have outputs in the form of variable frequencies, which are measured using high-speed parallel counters. The resulting count totals are converted to numeric representations of the original frequencies, which bear a direct relationship to temperature, conductivity or pressure. Sampling frequencies for these sensors are typically set at 24 Hz.

The temperature sensing element is a glass-coated thermistor bead, pressure-protected inside a stainless steel tube, while the conductivity sensing element is a cylindrical, flow-through, borosilicate glass cell with three internal platinum electrodes. Thermistor resistance or conductivity cell resistance, respectively, is the controlling element in an optimized Wien Bridge oscillator circuit, which produces a frequency output that can be converted to a temperature or conductivity reading. These sensors are available with depth ratings of 6800 m (aluminium housing) or 10500 m (titanium housing). The Paroscientific Digiquartz pressure sensor comprises a quartz crystal resonator that responds to pressure-induced stress, and temperature is measured for thermal compensation of the calculated pressure.

Additional sensors

Optional sensors for dissolved oxygen, pH, light transmission, fluorescence and others do not require the very high levels of resolution needed in the primary CTD channels, nor do these sensors generally offer variable frequency outputs. Accordingly, signals from the auxiliary sensors are acquired using a conventional voltage-input multiplexed A/D converter (optional). Some Sea-Bird CTDs use a strain gauge pressure sensor (Senso-Metrics) in which case their pressure output data is in the same form as that from the auxiliary sensors as described above.

Deck unit or SEARAM

Each underwater unit is connected to a power supply and data logging system: the SBE 11 (or SBE 11 plus) deck unit allows real-time interfacing between the deck and the underwater unit via a conductive wire, while the submersible SBE 17 (or SBE 17 plus) SEARAM plugs directly into the underwater unit and data are downloaded on recovery of the CTD. The combination of SBE 9 and SBE 17 or SBE 11 are termed SBE 917 or SBE 911, respectively, while the combinations of SBE 9 plus and SBE 17 plus or SBE 11 plus are termed SBE 917 plus or SBE 911 plus.

Specifications

Specifications for the SBE 9 plus underwater unit are listed below:

Parameter Range Initial accuracy Resolution at 24 Hz Response time
Temperature -5 to 35°C 0.001°C 0.0002°C 0.065 sec
Conductivity 0 to 7 S m-1 0.0003 S m-1 0.00004 S m-1 0.065 sec (pumped)
Pressure 0 to full scale (1400, 2000, 4200, 6800 or 10500 m) 0.015% of full scale 0.001% of full scale 0.015 sec

Further details can be found in the manufacturer's specification sheet.

Chelsea Technologies Group Aquatracka MKIII fluorometer

The Chelsea Technologies Group Aquatracka MKIII is a logarithmic response fluorometer. Filters are available to enable the instrument to measure chlorophyll, rhodamine, fluorescein and turbidity.

It uses a pulsed (5.5 Hz) xenon light source discharging along two signal paths to eliminate variations in the flashlamp intensity. The reference path measures the intensity of the light source whilst the signal path measures the intensity of the light emitted from the specimen under test. The reference signal and the emitted light signals are then applied to a ratiometric circuit. In this circuit, the ratio of returned signal to reference signal is computed and scaled logarithmically to achieve a wide dynamic range. The logarithmic conversion accuracy is maintained at better than one percent of the reading over the full output range of the instrument.

Two variants of the instrument are available, both manufactured in titanium, capable of operating in depths from shallow water down to 2000 m and 6000 m respectively. The optical characteristics of the instrument in its different detection modes are visible below:

Excitation Chlorophyll a Rhodamine Fluorescein Turbidity
Wavelength (nm) 430 500 485 440*
Bandwidth (nm) 105 70 22 80*
Emission Chlorophyll a Rhodamine Fluorescein Turbidity
Wavelength (nm) 685 590 530 440*
Bandwidth (nm) 30 45 30 80*

* The wavelengths for the turbidity filters are customer selectable but must be in the range 400 to 700 nm. The same wavelength is used in the excitation path and the emission path.

The instrument measures chlorophyll a, rhodamine and fluorescein with a concentration range of 0.01 µg l-1 to 100 µg l-1. The concentration range for turbidity is 0.01 to 100 FTU (other wavelengths are available on request).

The instrument accuracy is ± 0.02 µg l-1 (or ± 3% of the reading, whichever is greater) for chlorophyll a, rhodamine and fluorescein. The accuracy for turbidity, over a 0 - 10 FTU range, is ± 0.02 FTU (or ± 3% of the reading, whichever is greater).

Further details are available from the Aquatracka MKIII specification sheet.

WETLabs Single-angle Backscattering Meter ECO BB

An optical scattering sensor that measures scattering at 117°. This angle was determined as a minimum convergence point for variations in the volume scattering function induced by suspended materials and water. The measured signal is less determined by the type and size of the materials in the water and is more directly correlated to their concentration.

Several versions are available, with minor differences in their specifications:

  • ECO BB(RT)provides analog or RS-232 serial output with 4000 count range
  • ECO BB(RT)D adds the possibility of being deployed in depths up to 6000 m while keeping the capabilities of ECO BB(RT)
  • ECO BB provides the capabilities of ECO BB(RT) with periodic sampling
  • ECO BBB is similar to ECO BB but with internal batteries for autonomous operation
  • ECO BBS is similar to ECO BB but with an integrated anti-fouling bio-wiper
  • ECO BBSB has the capabilities of ECO BBS but with internal batteries for autonomous operation

Specifications

Wavelength 471, 532, 660 nm
Sensitivity (m-1 sr-1)

1.2 x 10-5 at 470 nm

7.7 x 10-6 at 532 nm

3.8 x 10-6 at 660 nm

Typical range ~0.0024 to 5 m-1
Linearity 99% R2
Sample rate up to 8Hz
Temperature range 0 to 30°C
Depth rating

600 m (standard)

6000 m (deep)

Further details can be found in the manufacturer's specification sheet.

Paroscientific Absolute Pressure Transducers Series 3000 and 4000

Paroscientific Series 3000 and 4000 pressure transducers use a Digiquartz pressure sensor to provide high accuracy and precision data. The sensor comprises a quartz crystal resonator that responds to pressure-induced stress, and temperature is measured for thermal compensation of the calculated pressure.

The 3000 series of transducers includes one model, the 31K-101, whereas the 4000 series includes several models, listed in the table below. All transducers exhibit repeatability of better than ±0.01% full pressure scale, hysteresis of better than ±0.02% full scale and acceleration sensitivity of ±0.008% full scale /g (three axis average). Pressure resolution is better than 0.0001% and accuracy is typically 0.01% over a broad range of temperatures.

Differences between the models lie in their pressure and operating temperature ranges, as detailed below:

Model Max. pressure (psia) Max. pressure (MPa) Temperature range (°C)
31K-101 1000 6.9 -54 to 107
42K-101 2000 13.8 0 to 125
43K-101 3000 20.7 0 to 125
46K-101 6000 41.4 0 to 125
410K-101 10000 68.9 0 to 125
415K-101 15000 103 0 to 50
420K-101 20000 138 0 to 50
430K-101 30000 207 0 to 50
440K-101 40000 276 0 to 50

Further details can be found in the manufacturer's specification sheet.

BODC Processing

The CTD data were supplied to BODC as eighty five MStar files and converted to the BODC internal format (netCDF).

During transfer the originator's variables were mapped to unique BODC parameter codes. The following table shows the parameter mapping.

Originator's variable Units Description BODC Code Units Comments
scan - Scan number - - Not transferred - will be superseded in BODC processing
time - Time - - Not transferred - will be superseded in BODC processing
press decibars Pressure (spatial co-ordinate) exerted by the water body by profiling pressure sensor and corrected to read zero at sea level. PRESPR01 decibars -
altimeter m Height above bed in the water body AHSFZZ01 m -
temp degC Temperature of the water body by CTD TEMPST01 degC -
temp1 degC Temperature of the water body by CTD - - Secondary channel, not retained
temp2 degC Temperature of the water body by CTD - - Secondary channel, not retained
cond mS/cm Electrical conductivity of the water body by in-situ conductivity cell and calibration against independent measurements CNDCST01 S/m Converted (/10)
cond1 mS/cm Electrical conductivity of the water body by in-situ conductivity cell and calibration against independent measurements - - Secondary channel, not retained
cond2 mS/cm Electrical conductivity of the water body by in-situ conductivity cell and calibration against independent measurements - - Secondary channel, not retained
oxygen µmol/kg Concentration of oxygen {O2} per unit volume of the water body [dissolved phase] by Sea-Bird SBE 43 sensor and calibration against sample data DOXYSC01 µmol/l Conversion by BODC to µmol l-1 using TOKGPR01
fluor µg/l Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate phase] by in-situ chlorophyll fluorometer and manufacturer's calibration applied CPHLPM01 mg/m3 µg/l=mg/m3
transmittance % Transmittance (red light wavelength) per 25cm of the water body by 25cm path length red light transmissometer POPTDR01 % -
turbidity m-1/sr Attenuance due to backscatter (650 nm wavelength at 117 degree incidence) by the water body [particulate >unknown phase] by in-situ optical backscatter measurement BB117R02 /m/nm/sr m-1/sr equivilent to /m/nm/sr
psal pss-78 Practical salinity of the water body by CTD and computation using UNESCO 1983 algorithm PSALST01 pss-78 Calculated from calibrated conductivity measurements, by the originator
psal1 pss-78 Practical salinity of the water body by CTD - - Secondary channel, not retained
psal2 pss-78 Practical salinity of the water body by CTD - - Secondary channel, not retained
depth m Depth below surface (sampling event start) of the water body by profiling pressure sensor and conversion to depth using unspecified algorithm. DEPHPRST m -
potemp degC Potential Temperature - - Not transferred - can be calculated from pressure, salinity and temperature
potemp1 degC Potential Temperature - - Not transferred - can be calculated from pressure, salinity and temperature
potemp2 degC Potential Temperature - - Not transferred - can be calculated from pressure, salinity and temperature
- - Saturation of oxygen {o2} in the water body [dissolved plus reactive particulate phase] OXYSZZ01 % Derived by BODC using DOXYSC01, TEMPST01 and PSALST01
- - Potential temperature of the water body by computation using unesco 1983 algorithm POTMCV01 °C Derived by BODC using TEMPST01, PSALST01 and PRESPR01.
- - Sigma-theta of the water body by CTD and computation from salinity and potential temperature using UNESCO algorithm SIGTPR01 kg m-3 Derived by BODC using POTMCV01, PSALST01 and PRESPR01
- - Conversion factor (volume to mass) for the water body by CTD and computation of density (in-situ potential temperature surface pressure) reciprocal from pressure, temperature and salinity TOKGPR01 l kg-1 Derived by BODC using SIGTPR01

Following transfer the data were screened using BODC in-house visualisation software. Suspect data values were assigned the appropriate BODC data quality flag. Missing data values, where present, were changed to the missing data value and assigned a BODC data quality flag

Cruise DY031 Originator's CTD data processing

Sampling strategy

A total of 85 CTD casts were performed during the cruise.

Data processing

Raw CTD data were transferred from the Sea-Bird deck unit to a LINUX machine via Sea-Bird software. The binary files are converted using Sea-Bird processing software (SBE Data Processing). The ASCII files were converted to MSTAR format and MEXEC programs run to process the data which included reducing the frequency of the data from 24Hz to 1Hz, calibrating the data, and averaging the downcast to a 2db pressure grid. A calibration was produced for the CTD primary conductivity sensor by merging the salinity sample data with the CTD data. Details of the MEXEC programs used and further details of the processing performed can be found in the cruise report.


Project Information

NOCS National Capability

The National Oceanography Centre Southampton National Capability focuses on long term science concerned with basin/decadal variability of the Ocean.


Data Activity or Cruise Information

Cruise

Cruise Name DY031
Departure Date 2015-05-29
Arrival Date 2015-06-17
Principal Scientist(s)N Penny Holliday (National Oceanography Centre, Southampton)
Ship RRS Discovery

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameEllett Line/Extended Ellett Line Station O
CategoryOffshore location
Latitude57° 9.00' N
Longitude9° 42.00' W
Water depth below MSL1900.0 m

Ellett Line/Extended Ellett Line: Station O

Station O is one of the fixed CTD stations, which together form The Extended Ellett Line. The line lies between Iceland and the Sound of Mull (Scotland) crossing the Iceland Basin and Rockall Trough via the outcrop of Rockall. As part of this initiative, CTD dips, together with associated discrete sampling of the water column, have typically been carried out annually at this station since September 1996.

Prior to September 1996, Station O was part of a shorter repeated survey section, consisting of 35 fixed stations, known as The Ellett Line (originally termed the Anton Dohrn Seamount Section). This line incorporated those stations across the Rockall Trough and Scottish shelf between Rockall and the Sound of Mull and was visited at regular intervals (usually at least once a year) between 1975 and January 1996.

Related Fixed Station activities are detailed in Appendix 1


BODC Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
Blank Unqualified
< Below detection limit
> In excess of quoted value
A Taxonomic flag for affinis (aff.)
B Beginning of CTD Down/Up Cast
C Taxonomic flag for confer (cf.)
D Thermometric depth
E End of CTD Down/Up Cast
G Non-taxonomic biological characteristic uncertainty
H Extrapolated value
I Taxonomic flag for single species (sp.)
K Improbable value - unknown quality control source
L Improbable value - originator's quality control
M Improbable value - BODC quality control
N Null value
O Improbable value - user quality control
P Trace/calm
Q Indeterminate
R Replacement value
S Estimated value
T Interpolated value
U Uncalibrated
W Control value
X Excessive difference

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
0 no quality control
1 good value
2 probably good value
3 probably bad value
4 bad value
5 changed value
6 value below detection
7 value in excess
8 interpolated value
9 missing value
A value phenomenon uncertain
Q value below limit of quantification

Appendix 1: Ellett Line/Extended Ellett Line Station O

Related series for this Fixed Station are presented in the table below. Further information can be found by following the appropriate links.

If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.

Series IdentifierData CategoryStart date/timeStart positionCruise
89925CTD or STD cast1975-05-04 03:08:0057.1466 N, 9.7083 WRRS Challenger CH7A/75
89255CTD or STD cast1975-07-05 14:00:0057.1666 N, 9.6833 WRRS Challenger CH10A/75
90139CTD or STD cast1975-11-08 16:52:0057.15 N, 9.695 WRRS Challenger CH14A/75
90569CTD or STD cast1976-04-02 22:55:0057.145 N, 9.7016 WRRS Challenger CH5A/76
91180CTD or STD cast1976-05-21 15:45:0057.1466 N, 9.7033 WRRS Challenger CH8/76
91978CTD or STD cast1977-04-15 15:10:0057.15 N, 9.7016 WRRS Challenger CH6B/77
94245CTD or STD cast1977-07-24 16:01:0057.1566 N, 9.7216 WRRS Challenger CH11/77
88713CTD or STD cast1977-08-21 19:53:0057.145 N, 9.7233 WRRS Challenger CH13/77
92540CTD or STD cast1978-02-07 12:15:0057.1566 N, 9.7183 WRRS Challenger CH2/78
95316CTD or STD cast1978-06-06 11:31:0057.15 N, 9.6916 WRRS Challenger CH9/78
186105CTD or STD cast1978-08-10 10:27:0057.1416 N, 9.6883 WRRS Challenger CH11B/78
190884CTD or STD cast1978-09-13 00:30:0057.15 N, 9.705 WRRS Challenger CH11D/78
98719CTD or STD cast1979-05-21 12:10:0057.1483 N, 9.705 WRRS Challenger CH7/79
95931CTD or STD cast1979-09-14 18:53:0057.1583 N, 9.69 WRRS Challenger CH13/79
96123CTD or STD cast1979-10-30 08:07:0057.15 N, 9.7066 WRRS Challenger CH16/79
187667CTD or STD cast1980-03-03 17:01:0057.1483 N, 9.6983 WRRS Challenger CH4/80
187679CTD or STD cast1980-03-03 17:20:0057.1483 N, 9.6983 WRRS Challenger CH4/80
188960CTD or STD cast1980-05-05 00:57:0057.155 N, 9.705 WRRS Challenger CH7/80
312711CTD or STD cast1981-01-30 21:10:0057.15 N, 9.7 WRRS Challenger CH2/81
187852CTD or STD cast1981-04-13 00:37:0057.1533 N, 9.6983 WRRS Challenger CH6A/81
188401CTD or STD cast1981-04-20 22:05:0057.1516 N, 9.6983 WRRS Challenger CH6B/81
192203CTD or STD cast1981-07-12 12:08:0057.1516 N, 9.7016 WRRS Challenger CH10/81
187194CTD or STD cast1981-10-17 00:41:0057.1483 N, 9.7016 WRRS Challenger CH15/81
189188CTD or STD cast1982-04-27 22:08:0057.1483 N, 9.6983 WRRS Challenger CH7A/82
193488CTD or STD cast1983-05-24 23:21:0057.15 N, 9.7016 WRRS Challenger CH7B/83
193507CTD or STD cast1983-05-24 23:38:0057.1566 N, 9.7 WRRS Challenger CH7B/83
97046CTD or STD cast1983-08-18 23:10:0057.1383 N, 9.7316 WRRS Challenger CH11/83
253924CTD or STD cast1985-05-08 20:47:0057.15 N, 9.6983 WRRS Challenger CH4/85
261229CTD or STD cast1985-08-20 10:11:0057.1516 N, 9.6866 WRRS Challenger CH8/85
264203CTD or STD cast1987-01-10 14:28:0057.15 N, 9.7 WRRS Challenger CH9
250545CTD or STD cast1987-04-30 04:03:0057.1516 N, 9.6883 WRRS Challenger CH14
266885CTD or STD cast1988-03-06 04:47:0057.15 N, 9.6966 WRRS Challenger CH25
263931CTD or STD cast1988-06-20 06:27:0057.15 N, 9.6983 WRRS Challenger CH30
265396CTD or STD cast1989-01-24 20:13:0057.15 N, 9.7 WRRS Discovery D180
265894CTD or STD cast1989-05-06 08:58:0057.15 N, 9.7 WRV Lough Foyle LF1/89
317672CTD or STD cast1989-08-05 12:36:0057.15 N, 9.7 WRV Lough Foyle LF2/89
316853CTD or STD cast1989-11-26 05:38:0057.1517 N, 9.7 WRRS Charles Darwin CD44
315051CTD or STD cast1990-06-28 03:06:0057.15 N, 9.7017 WRRS Challenger CH67A
259803CTD or STD cast1990-09-02 09:57:0057.15 N, 9.7 WRRS Challenger CH71A
382536CTD or STD cast1991-02-27 00:12:0057.15 N, 9.6983 WRRS Challenger CH75B
316238CTD or STD cast1991-07-02 20:11:0057.15 N, 9.7 WRRS Challenger CH81
386525CTD or STD cast1992-09-27 01:35:0057.1517 N, 9.6983 WRRS Challenger CH97
385706CTD or STD cast1993-05-16 20:48:0057.15 N, 9.7017 WRRS Challenger CH103
385835CTD or STD cast1993-05-18 00:01:0057.15 N, 9.6983 WRRS Challenger CH103
387830CTD or STD cast1993-09-07 21:42:0057.1508 N, 9.6878 WRRS Challenger CH105
389105CTD or STD cast1994-03-18 09:17:0057.15 N, 9.7 WRRS Challenger CH110
389314CTD or STD cast1994-05-03 16:38:0057.15 N, 9.7 WRRS Challenger CH112
389431CTD or STD cast1994-05-07 18:40:0057.15 N, 9.7 WRRS Challenger CH112
390862CTD or STD cast1994-08-17 03:10:0057.15 N, 9.7 WRRS Challenger CH114
392008CTD or STD cast1994-11-24 22:37:0057.1507 N, 9.6993 WRRS Challenger CH116
434768CTD or STD cast1995-04-16 06:11:0057.15 N, 9.7 WRRS Charles Darwin CD92B
435378CTD or STD cast1995-04-30 03:27:0057.15 N, 9.7 WRRS Charles Darwin CD92B
390481CTD or STD cast1995-07-30 21:29:0057.15 N, 9.6992 WRRS Challenger CH120
434086CTD or STD cast1996-01-13 03:36:0057.15 N, 9.7 WRRS Challenger CH124
1014607CTD or STD cast1996-10-01 04:24:0057.14117 N, 9.689 WRRS Discovery D223A
1850107Water sample data1996-10-01 05:29:0057.14109 N, 9.68897 WRRS Discovery D223A
1008048CTD or STD cast1997-09-14 04:09:0057.15467 N, 9.7105 WRRS Discovery D230
1305029Water sample data1997-09-14 05:07:0057.15463 N, 9.71044 WRRS Discovery D230
1020650CTD or STD cast1998-05-26 11:21:0057.15183 N, 9.69983 WRRS Discovery D233
1306309Water sample data1998-05-26 12:16:0057.15178 N, 9.6999 WRRS Discovery D233
1849468Water sample data1998-05-26 12:16:0057.15178 N, 9.6999 WRRS Discovery D233
1070566CTD or STD cast1999-09-10 22:47:0057.13983 N, 9.71817 WRRS Discovery D242
1070671CTD or STD cast1999-09-12 01:12:0057.14583 N, 9.60783 WRRS Discovery D242
1252003Water sample data1999-09-12 01:46:0057.14583 N, 9.60783 WRRS Discovery D242
1075177CTD or STD cast2000-02-03 20:40:0057.16083 N, 9.68433 WRRS Discovery D245
559185CTD or STD cast2000-05-18 22:10:0057.15 N, 9.695 WFRV Scotia 0700S
676823CTD or STD cast2001-05-20 13:39:0057.15017 N, 9.69033 WRRS Discovery D253
626722CTD or STD cast2003-04-18 02:37:0057.1497 N, 9.6988 WFRV Scotia 0703S
845027CTD or STD cast2003-07-23 18:20:0057.14935 N, 9.70172 WFS Poseidon PO300_2
667094CTD or STD cast2004-07-13 12:31:0057.1495 N, 9.702 WFS Poseidon PO314
896433CTD or STD cast2005-10-10 12:58:0057.15424 N, 9.7032 WRRS Charles Darwin CD176
776639CTD or STD cast2006-10-25 23:14:3757.14867 N, 9.701 WRRS Discovery D312
847894CTD or STD cast2007-08-30 06:53:5757.14846 N, 9.70677 WRRS Discovery D321B
880897CTD or STD cast2008-05-23 02:25:0057.13533 N, 9.66967 WFRV Scotia 0508S
1616910Water sample data2008-05-23 02:25:0057.13533 N, 9.66967 WFRV Scotia 0508S
954345CTD or STD cast2009-06-20 08:31:5057.15213 N, 9.6969 WRRS Discovery D340A
1052793CTD or STD cast2010-05-20 14:25:4757.14917 N, 9.6995 WRRS Discovery D351
1896836Water sample data2010-05-20 15:20:0057.14967 N, 9.69941 WRRS Discovery D351
1195813CTD or STD cast2011-05-31 08:38:3357.15567 N, 9.70317 WRRS Discovery D365
1203476CTD or STD cast2012-08-03 21:10:0057.1517 N, 9.70046 WRRS Discovery D379
1220467CTD or STD cast2013-05-20 08:53:4657.1525 N, 9.7035 WRRS James Cook JC086
1371223CTD or STD cast2014-07-15 23:29:2357.1492 N, 9.6999 WRRS James Clark Ross JR20140531 (JR302)
1722443Currents -subsurface Eulerian2015-06-13 21:30:0857.14946 N, 9.69946 WRRS Discovery DY031
1879292Water sample data2015-06-13 22:27:0057.14952 N, 9.69952 WRRS Discovery DY031
1764648CTD or STD cast2016-06-18 02:05:2057.1489 N, 9.6983 WRRS Discovery DY052
1765781Currents -subsurface Eulerian2016-06-18 02:05:3757.14891 N, 9.69824 WRRS Discovery DY052
1874970Water sample data2016-06-18 02:54:0057.14892 N, 9.69826 WRRS Discovery DY052