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Metadata Report for BODC Series Reference Number 559333

Metadata Summary

Data Description

Data Category CTD or STD cast
Instrument Type
Sea-Bird SBE 911plus CTD  CTD; water temperature sensor; salinity sensor
Instrument Mounting research vessel
Originating Country United Kingdom
Originator -
Originating Organization Fisheries Research Services Aberdeen Marine Laboratory (now Marine Scotland Aberdeen Marine Laboratory)
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) -

Data Identifiers

Originator's Identifier SC07/00/0196
BODC Series Reference 559333

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2000-05-20 21:43
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval 1.0 decibars

Spatial Co-ordinates

Latitude 60.50000 N ( 60° 30.0' N )
Longitude 0.00000 E ( 0° 0.0' E )
Positional Uncertainty Unspecified
Minimum Sensor or Sampling Depth 2.97 m
Maximum Sensor or Sampling Depth 109.92 m
Minimum Sensor or Sampling Height 10.07 m
Maximum Sensor or Sampling Height 117.03 m
Sea Floor Depth 120.0 m
Sea Floor Depth Source -
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 Instantaneous - Depth measured below water line or instantaneous water body surface


BODC CODERankUnitsTitle
CNDCPR011Siemens per metreElectrical conductivity of the water body by in-situ conductivity cell
PRESPR011DecibarsPressure (spatial coordinate) exerted by the water body by profiling pressure sensor and correction to read zero at sea level
PSALPR011DimensionlessPractical salinity of the water body by conductivity cell and computation using UNESCO 1983 algorithm
TEMPST011Degrees CelsiusTemperature of the water body by CTD or STD

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

Public domain 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.

The recommended acknowledgment is

"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."

Narrative Documents

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.

RV Scotia 7/2000 CTD Data Documentation


Documentation for data collected on R.V. Scotia cruise 7/2000 (8 May - 22 May 2000) by Fisheries Research Services, Aberdeen, UK.

Instrumentation and Protocols

The temperature and salinity data were collected using a SeaBird SBE9/11+ instrument which was calibrated using bottle samples and thermometer readings to produce the following equations:

T(cal) = T(obs)

C(cal) = 1.000276C(obs) + 0.011413

For further information, contact

George Slesser
Ocean Climate Group
FRS, Marine Laboratory Aberdeen
PO Box 101
Victoria Road
Aberdeen AB11 9DB

Project Information

No Project Information held for the Series

Data Activity or Cruise Information


Cruise Name 0700S
Departure Date 2000-05-08
Arrival Date 2000-05-22
Principal Scientist(s)Bill Turrell (Fisheries Research Services Aberdeen Marine Laboratory)
Ship FRV Scotia

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

Station NameEast of Shetland Line 2
CategoryOffshore route/traverse

East of Shetland Line 2

The East of Shetland Line 2 consists of a line of sample stations east of Shetland, along latitude 60°30.00'N to the centre of the North Sea.

At present the Fisheries Research Services (FRS) monitors this line. These data provide information on long term variations in key variables.

Monitoring data include: Ocean profiles of temperature, salinity and nutrients.

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: East of Shetland Line 2

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
559321CTD or STD cast2000-05-20 21:00:0060.4983 N, 0.1667 EFRV Scotia 0700S
559345CTD or STD cast2000-05-20 22:27:0060.5 N, 0.1667 WFRV Scotia 0700S
559357CTD or STD cast2000-05-20 23:14:0060.5 N, 0.3317 WFRV Scotia 0700S
559369CTD or STD cast2000-05-21 00:01:0060.5 N, 0.4983 WFRV Scotia 0700S
559370CTD or STD cast2000-05-21 00:49:0060.4983 N, 0.6683 WFRV Scotia 0700S
559382CTD or STD cast2000-05-21 01:36:0060.4967 N, 0.835 WFRV Scotia 0700S
559394CTD or STD cast2000-05-21 02:09:0060.4983 N, 0.9167 WFRV Scotia 0700S
559401CTD or STD cast2000-05-21 02:44:0060.5017 N, 1.0 WFRV Scotia 0700S
710303CTD or STD cast2005-05-09 00:08:0060.4965 N, 1.66317 EFRV Scotia 0705S_1
710315CTD or STD cast2005-05-09 01:36:0060.4975 N, 1.33333 EFRV Scotia 0705S_1
710327CTD or STD cast2005-05-09 03:05:0060.496 N, 1.0055 EFRV Scotia 0705S_1
710339CTD or STD cast2005-05-09 04:26:0060.49883 N, 0.66467 EFRV Scotia 0705S_1
710340CTD or STD cast2005-05-09 05:54:0060.50017 N, 0.33233 EFRV Scotia 0705S_1
710352CTD or STD cast2005-05-09 07:23:0060.4985 N, 1.7E-4 WFRV Scotia 0705S_1
710364CTD or STD cast2005-05-09 08:43:0060.50133 N, 0.336 WFRV Scotia 0705S_1
710376CTD or STD cast2005-05-09 09:27:0060.49917 N, 0.49667 WFRV Scotia 0705S_1
710388CTD or STD cast2005-05-09 10:09:0060.49917 N, 0.66033 WFRV Scotia 0705S_1
710407CTD or STD cast2005-05-09 17:13:0060.5 N, 0.83483 WFRV Scotia 0705S_1
710419CTD or STD cast2005-05-09 18:06:0060.49983 N, 1.0 WFRV Scotia 0705S_1
712819CTD or STD cast2005-09-29 17:34:0060.49933 N, 0.99483 EFRV Scotia 1405S
712820CTD or STD cast2005-09-29 18:55:0060.49933 N, 0.67167 EFRV Scotia 1405S
712832CTD or STD cast2005-09-29 20:22:0060.49983 N, 0.3385 EFRV Scotia 1405S
712844CTD or STD cast2005-09-29 21:47:0060.501 N, 0.00283 EFRV Scotia 1405S
712856CTD or STD cast2005-09-29 23:04:0060.50067 N, 0.33583 WFRV Scotia 1405S
712868CTD or STD cast2005-09-29 23:49:0060.499 N, 0.49983 WFRV Scotia 1405S
712881CTD or STD cast2005-09-30 00:39:0060.5 N, 0.66317 WFRV Scotia 1405S
712893CTD or STD cast2005-09-30 01:26:0060.50033 N, 0.83367 WFRV Scotia 1405S
712900CTD or STD cast2005-09-30 02:10:0060.49983 N, 0.999 WFRV Scotia 1405S
726551CTD or STD cast2006-10-09 06:09:0060.50067 N, 1.0 WFRV Scotia 1506S
726563CTD or STD cast2006-10-09 06:51:0060.5 N, 0.83383 WFRV Scotia 1506S
726575CTD or STD cast2006-10-09 07:40:0060.50017 N, 0.66933 WFRV Scotia 1506S
726587CTD or STD cast2006-10-09 08:33:0060.50267 N, 0.50417 WFRV Scotia 1506S
726599CTD or STD cast2006-10-09 09:23:0060.49983 N, 0.3355 WFRV Scotia 1506S
726606CTD or STD cast2006-10-09 10:36:0060.50133 N, 0.0015 WFRV Scotia 1506S
726618CTD or STD cast2006-10-09 11:49:0060.4995 N, 0.33483 EFRV Scotia 1506S
726631CTD or STD cast2006-10-09 13:12:0060.49967 N, 0.66617 EFRV Scotia 1506S
726643CTD or STD cast2006-10-09 14:32:0060.50083 N, 0.99683 EFRV Scotia 1506S
726655CTD or STD cast2006-10-09 15:43:0060.49917 N, 1.33183 EFRV Scotia 1506S
726667CTD or STD cast2006-10-09 17:04:0060.499 N, 1.667 EFRV Scotia 1506S
726679CTD or STD cast2006-10-09 17:51:0060.4995 N, 1.83117 EFRV Scotia 1506S
1036117CTD or STD cast2009-10-03 15:50:0060.50233 N, 1.66433 EFRV Scotia 1309S
1036129CTD or STD cast2009-10-03 17:13:0060.4995 N, 1.33267 EFRV Scotia 1309S
1036130CTD or STD cast2009-10-03 18:34:0060.49967 N, 0.998 EFRV Scotia 1309S
1036142CTD or STD cast2009-10-03 19:55:0060.4995 N, 0.66083 EFRV Scotia 1309S
1036154CTD or STD cast2009-10-03 21:18:0060.49883 N, 0.32767 EFRV Scotia 1309S
1036166CTD or STD cast2009-10-04 05:11:0060.49933 N, 0.009 WFRV Scotia 1309S
1036178CTD or STD cast2009-10-04 06:34:0060.5005 N, 0.33283 WFRV Scotia 1309S
1036191CTD or STD cast2009-10-04 07:21:0060.50083 N, 0.5045 WFRV Scotia 1309S
1036209CTD or STD cast2009-10-04 08:09:0060.49867 N, 0.66917 WFRV Scotia 1309S
1036210CTD or STD cast2009-10-04 09:05:0060.5005 N, 0.834 WFRV Scotia 1309S
1036222CTD or STD cast2009-10-04 09:58:0060.50067 N, 1.00067 WFRV Scotia 1309S