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Metadata Report for BODC Series Reference Number 1220559

Metadata Summary

Data Description

Data Category CTD or STD cast
Instrument Type
Sea-Bird SBE 43 Dissolved Oxygen Sensor  dissolved gas sensors
Sea-Bird SBE 911plus CTD  CTD; water temperature sensor; salinity sensor
WET Labs {Sea-Bird WETLabs} ECO BB(RT)D backscattering sensor  optical backscatter 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
Chelsea Technologies Group Alphatracka II transmissometer  transmissometers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Mr Colin Griffiths
Originating Organization Scottish Association for Marine Science
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) -

Data Identifiers

Originator's Identifier CTD_JC086_055_2DB
BODC Series Reference 1220559

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2013-05-20 22:26
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval 2.0 decibars

Spatial Co-ordinates

Latitude 57.09278 N ( 57° 5.6' N )
Longitude 9.37139 W ( 9° 22.3' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth 2.98 m
Maximum Sensor or Sampling Depth 199.8 m
Minimum Sensor or Sampling Height 6.2 m
Maximum Sensor or Sampling Height 203.02 m
Sea Floor Depth 206.0 m
Sea Floor Depth Source CRREP
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 Instantaneous - Depth measured below water line or instantaneous water body surface
Sea Floor Depth Datum Approximate - Depth is only approximate


BODC CODERankUnitsTitle
ACYCAA011DimensionlessSequence number
BB117R011per metre per nanometre per steradianAttenuation due to backscatter (660 nm wavelength at 117 degree incidence) by the water body [particulate >unknown phase] by in-situ optical backscatter measurement
CNDCST021Siemens per metreElectrical conductivity of the water body by CTD (sensor 2)
CPHLPR011Milligrams 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
DEPHPR011MetresDepth (spatial coordinate) relative to water surface in the water body by profiling pressure sensor and conversion to seawater depth using UNESCO algorithm
DOXYZZ011Micromoles per litreConcentration of oxygen {O2 CAS 7782-44-7} per unit volume of the water body [dissolved plus reactive particulate phase] by in-situ sensor
POPTDR011PercentTransmittance (red light wavelength) per 25cm of the water body by 25cm path length red light transmissometer
PRESPR011DecibarsPressure (spatial coordinate) exerted by the water body by profiling pressure sensor and correction to read zero at sea level
PSALST021DimensionlessPractical salinity of the water body by CTD (second sensor) and computation using UNESCO 1983 algorithm
TEMPST021Degrees CelsiusTemperature of the water body by CTD or STD (second sensor)

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 quality for JC086 CTD data

Data users should note that oxygen saturation values in the range of 100-120% were recorded in the near-surface water for the majority of casts on this cruise.

Data Access Policy

Open Data

These data have no specific confidentiality restrictions for users. However, users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgment.

If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:

"Contains public sector information licensed under the Open Government Licence v1.0."

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.


Housing Plastic or titanium

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.

JC086 CTD Instrumentation

CTD unit and auxiliary sensors (stainless steel frame)

The primary CTD system used on cruise JC086 was the Sea-Bird 911 plus. This was mounted on a stainless steel rosette frame, equipped with 24 10-litre Niskin bottles. The CTD was fitted with the following scientific sensors:

Sensor Unit Model Serial Number Full Specification Last calibration date (YYYY-MM-DD) Comments
CTD underwater unit SBE 9plus 09P-0943 SBE 9plus - -
Temperature sensor SBE 3P 03P-2674 SBE 03P 2012-07-06 Primary sensor
Temperature sensor SBE 3P 03P-4782 SBE 03P 2012-07-06 Secondary sensor - this sensor is the preferred data stream
Conductivity sensor SBE 4 04C-2231 SBE 04C 2012-07-06 Primary sensor
Conductivity sensor SBE 4 04C-2450 SBE 04C 2012-05-08 Secondary sensor - this sensor is the preferred data stream
Pressure sensor SBE 9plus digiquartz 110557 - 2012-05-29 -
Dissolved oxygen SBE 43 43-2055 SBE 43 2012-06-27 -
Benthos altimeter - 6196.112522 - 2006-03-13 -
Turbidity meter WET Labs ECO-BBRTD 168 - 2012-09-24 -
Chlorophyll fluorometer Chelsea Instruments AQUAtracka MKIII 088195 AQUAtracka MKIII 2012-08-21 -
Transmissometer Chelsea Instruments Alphatracka MKII 09-7107-001 Alphatracka MKII 2012-06-11 -

The salinity samples from the CTD were analysed during the cruise using a Guildline Autosal model 8400B. Dissolved oxygen concentrations were determined using a Winkler titration technique.

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 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.

Chelsea Technologies Group ALPHAtracka and ALPHAtracka II transmissometers

The Chelsea Technologies Group ALPHAtracka (the Mark I) and its successor, the ALPHAtracka II (the Mark II), are both accurate (< 0.3 % fullscale) transmissometers that measure the beam attenuation coefficient at 660 nm. Green (565 nm), yellow (590 nm) and blue (470 nm) wavelength variants are available on special order.

The instrument consists of a Transmitter/Reference Assembly and a Detector Assembly aligned and spaced apart by an open support frame. The housing and frame are both manufactured in titanium and are pressure rated to 6000 m depth.

The Transmitter/Reference housing is sealed by an end cap. Inside the housing an LED light source emits a collimated beam through a sealed window. The Detector housing is also sealed by an end cap. A signal photodiode is placed behind a sealed window to receive the collimated beam from the Transmitter.

The primary difference between the ALPHAtracka and ALPHAtracka II is that the Alphatracka II is implemented with surface-mount technology; this has enabled a much smaller diameter pressure housing to be used while retaining exactly the same optical train as in the Mark I. Data from the Mark II version are thus fully compatible with that already obtained with the Mark I. The performance of the Mark II is further enhanced by two electronic developments from Chelsea Technologies Group - firstly, all items are locked in a signal nulling loop of near infinite gain and, secondly, the signal output linearity is inherently defined by digital circuitry only.

Among other advantages noted above, these features ensure that the optical intensity of the Mark II, indicated by the output voltage, is accurately represented by a straight line interpolation between a reading near full-scale under known conditions and a zero reading when blanked off.

For optimum measurements in a wide range of environmental conditions, the Mark I and Mark II are available in 5 cm, 10 cm and 25 cm path length versions. Output is default factory set to 2.5 volts but can be adjusted to 5 volts on request.

Further details about the Mark II instrument are available from the Chelsea Technologies Group ALPHAtrackaII 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


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.

JC086 CTD Originator data processing (Stainless Steel)

The following information contains extracts from the JC086 cruise report.

Sampling Strategy

A total of 81 CTD casts were performed during the cruise which sailed from and back to Govan on the west coast of Scotland, incorporating the Extended Ellett Line and Wyville Thomson Ridge area. All casts deployed during the cruise were housed in a stainless steel frame equipped with dual temperature and conductivity sensors. The CTD sensors were located within and near the bottom of the rosette frame which held 24 10-litre Niskin water sampling bottles.

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. Physical units were calculated from the frequency data using the manufacturer's calibration routines and the data converted to ASCII format. 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 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 Griffiths et al. (2013).



Throughout the cruise the CTD was sampled for salinity measurements in order to calibrate the conductivity sensors. Salinity was measured using a Guildline Autosal 8400B (#60839) in a temperature controlled room with the bath temperature set at 21°C and the ambient temperature set at approximately 20°C. All CTD data used for calibration purposes is sourced from the bottle files created by the Sea-Bird software. The autosal was standardised at the start of every run and a standard seawater analysed at the end of every crate. Each crate contained 24 bottles.

The primary and secondary conductivity sensors were treated separately, where the bottle salinity data was used to calculate the bottle conductivity. This was then compared with the CTD conductivity for calibration purposes. Both sensors portrayed a change in calibration over time, with an apparent drift around CTD casts 16-19. There was, however, a 3 day break between cast 16 and cast 17 which is the likely cause of this change, so the stations were placed into 2 groups for conductivity calibration purposes (casts 1-16 and casts 17-81). The secondary sensor has been specified as the preferred data stream for this dataset, where the mean of all salinity residuals for this sensor was 0.0109, and the standard deviation 0.0671. Excluding outliers (defined as +/- 1 standard deviation from the mean), the mean of salinity residuals is 0.0004 and the standard deviation 0.0049.


Bottle oxygen values were used to calibrate the CTD oxygen sensor. Firstly, the relationship between the bottle oxygen and the CTD oxygen was examined. Bottle sample units were converted to umol/kg using the calibrated CTD salinity.

Oxygen was sampled by both the National Oceanography Centre (NOC) and the Scottish Association for Marine Science (SAMS) chemists, but was initially examined separately as part of inter-group comparison during the cruise. The 2 groups samples taken from different niskin bottles from the same casts, were often, but not always, fired at the same depths. The NOC group sampled more bottles than the SAMS group. Although there was a small offset between the NOC and SAMS oxygen samples, it was very difficult to determine which possessed higher accuracy, and so for the calibration of the CTD oxygen sensor all available oxygen bottle samples were used.

After calibrations had been applied the mean of all oxygen residuals was 0.2 +/- 7.8 umol/kg, and when excluding outliers the mean was 1.0 +/- 5.1 umol/kg.

It was decided that the secondary sensor was the preferred data stream for all parameters measured throughout the JC086 cruise.


Griffiths C. R. et al., (2013). RRS James Cook Cruise JC086, 06 May 2013 - 26 May 2013. Govan to Govan, Scotland - the Extended Ellett Line. Scottish Association for Marine Science. (Scottish Marine Institute, Oban).

Available - Cruise JC086 Internal Report

JC086 CTD processing undertaken by BODC

Data arrived at BODC in a total of 81 MSTAR files representing the CTD casts conducted during cruise JC086. The data contained in the files are the downcast data averaged to a 2db pressure grid including temperature, salinity and dissolved oxygen channels processed to WOCE standards alongside concurrent fluorometer, transmissometer and turbidity data.

The casts were reformatted to BODC's internal NetCDF format. The following table shows the mapping of variables within the MSTAR files to appropriate BODC parameter codes:

Originator's Variable Units Description BODC Parameter Code Units Comments
press dbar Pressure exerted by the water column PRESPR01 dbar Manufacturer's calibration applied.
temp °C Temperature of the water column by CTD (secondary sensor) TEMPST02 °C The secondary sensor is the preferred data stream.
temp1 °C Temperature of the water column by CTD (primary sensor) TEMPST01 °C -
temp2 °C Temperature of the water column by CTD (secondary sensor) - - Not transferred. temp and temp2 contain the same data values so only temp was transferred.
cond mS/cm Electrical conductivity of the water column by CTD (secondary sensor) CNDCST02 S/m /10. Calibrated by Originator with discrete salinity samples from CTD bottles. The secondary sensor is the preferred data stream.
cond1 mS/cm Electrical conductivity of the water column by CTD (primary sensor) CNDCST01 S/m -
cond2 mS/cm Electrical conductivity of the water column by CTD (secondary sensor) - - Not transferred. cond and cond2 contain the same data values so only cond was transferred.
psal - Practical salinity of the water column by CTD (secondary sensor) PSALST02 - Calculated by Originator using calibrated conductivity. The secondary sensor is the preferred data stream.
psal1 - Practical salinity of the water column by CTD (primary sensor) PSALST01 - Calculated by Originator using calibrated conductivity.
psal2 - Practical salinity of the water column by CTD (seconday sensor) - - Not transferred. psal and psal2 contain the same data values so only psal was transferred.
oxygen µmol/kg Concentration of oxygen per unit volume of the water column DOXYZZ01 µmol/l Calibrated by Originator using discrete water samples from CTD bottles. Unit conversion automatically applied during transfer.
transmittance % Transmittance per 25 cm length of the water column by transmissometer POPTDR01 % -
fluor ug/l Concentration of chlorophyll-a per unit volume of the water column CPHLPR01 mg/m3 No unit conversion required as ug/l is the same as mg/m3.
turbidity m-1/sr Attenuance due to backscatter (660 nm wavelength at 117 degree incidence) by the water body BB117R01 m-1/sr -
depth m Depth below surface converted from pressure using UNESCO algorithm DEPHPR01 m -
altimeter m Height above bed from CTD - - Not transferred.
time s Time in seconds since the origin defined in the metadata field data_time_origin - - Not transferred.
potemp °C Potential temperature of the water column (secondary sensor) - - Not transferred.
potemp1 °C Potential temperature of the water column (primary sensor) - - Not transferred.
potemp2 °C Potential temperature of the water column (secondary sensor) - - Not transferred.
press_temp °C Temperature of the pressure sensor - - Not transferred.

The reformatted data were visualised using the in-house EDSERPLO software. Suspect data were marked by adding an appropriate quality control flag, and missing data marked by both setting the data to an appropriate value and setting the quality control flag.

Detailed metadata and documentation were compiled and linked to the data.

General Data Screening carried out by BODC

BODC screen both the series header qualifying information and the parameter values in the data cycles themselves.

Header information is inspected for:

  • Irregularities such as unfeasible values
  • Inconsistencies between related information, for example:
    • Times for instrument deployment and for start/end of data series
    • Length of record and the number of data cycles/cycle interval
    • Parameters expected and the parameters actually present in the data cycles
  • Originator's comments on meter/mooring performance and data quality

Documents are written by BODC highlighting irregularities which cannot be resolved.

Data cycles are inspected using time or depth series plots of all parameters. Currents are additionally inspected using vector scatter plots and time series plots of North and East velocity components. These presentations undergo intrinsic and extrinsic screening to detect infeasible values within the data cycles themselves and inconsistencies as seen when comparing characteristics of adjacent data sets displaced with respect to depth, position or time. Values suspected of being of non-oceanographic origin may be tagged with the BODC flag denoting suspect value; the data values will not be altered.

The following types of irregularity, each relying on visual detection in the plot, are amongst those which may be flagged as suspect:

  • Spurious data at the start or end of the record.
  • Obvious spikes occurring in periods free from meteorological disturbance.
  • A sequence of constant values in consecutive data cycles.

If a large percentage of the data is affected by irregularities then a Problem Report will be written rather than flagging the individual suspect values. Problem Reports are also used to highlight irregularities seen in the graphical data presentations.

Inconsistencies between the characteristics of the data set and those of its neighbours are sought and, where necessary, documented. This covers inconsistencies such as the following:

  • Maximum and minimum values of parameters (spikes excluded).
  • The occurrence of meteorological events.

This intrinsic and extrinsic screening of the parameter values seeks to confirm the qualifying information and the source laboratory's comments on the series. In screening and collating information, every care is taken to ensure that errors of BODC making are not introduced.

Project Information

No Project Information held for the Series

Data Activity or Cruise Information


Cruise Name JC086
Departure Date 2013-05-06
Arrival Date 2013-05-26
Principal Scientist(s)Colin R Griffiths (Scottish Association for Marine Science)
Ship RRS James Cook

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

Station NameStation R2
CategoryOffshore location
Latitude57° 2.26' N
Longitude9° 9.98' W
Water depth below MSL211.0 m

Station R2

Station R2 is a fixed station occasionally sampled as part of occupations of the Extended Ellett Line in order to help resolve shelf edge current phenomena. It is not, however, considered an official Extended Ellett Line Station by the scientists involved. Station R2 was first visited in August 2012. Please refer to the Extended Ellett Line document for details of the Extended Ellett Line Fixed Stations.

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
B nominal value
Q value below limit of quantification

Appendix 1: Station R2

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
1203415CTD or STD cast2012-08-03 11:48:0057.03758 N, 9.1664 WRRS Discovery D379