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Metadata Report for BODC Series Reference Number 464961

Metadata Summary

Data Description

Data Category CTD or STD cast
Instrument Type
Chelsea Technologies Group Aqualog CTD  fluorometers; CTD; water temperature sensor; salinity sensor; dissolved gas sensors
Instrument Mounting research vessel
Originating Country United Kingdom
Originator -
Originating Organization Scottish Office Agriculture Environment and Fisheries Department 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 CU10/96/0092
BODC Series Reference 464961

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1996-07-08 10:33
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval 1.0 metres

Spatial Co-ordinates

Latitude 58.00180 N ( 58° 0.1' N )
Longitude 5.58080 W ( 5° 34.8' W )
Positional Uncertainty Unspecified
Minimum Sensor or Sampling Depth 2.0 m
Maximum Sensor or Sampling Depth 92.0 m
Minimum Sensor or Sampling Height 9.0 m
Maximum Sensor or Sampling Height 99.0 m
Sea Floor Depth 101.0 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
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
DOXYPR011Micromoles per litreConcentration of oxygen {O2 CAS 7782-44-7} per unit volume of the water body [dissolved plus reactive particulate phase] by in-situ Beckmann probe
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

Chelsea Technologies Aqualog CTD

The Aqualog is a self-contained unit designed to measure pressure, temperature, conductivity, dissolved oxygen and fluorometry in a variety of modes, including vertical profiling, towed undulator and short-term moorings.

It is controlled by a microprocessor and comprises a CPU board, a memory board, an ADC board, a power supply/supply control board and a backplane. This logger can cater for 16 analogue input channels, with 60000 or 250000 12 bit resolution data point capacity. Data communication is carried out over a RS232 interface and the data points are stored in non-volatile battery backed memory.

The technical details are presented below:

Logging regime Configurable, intermittent or continuous modes
Maximum logging rate 16 channels per second
Analogue Input range options

-1 to 1 V

-2 to 2 V

-10 to 10 V

Resolution 1 in 4096 plus sign

RV Clupea 10/96 CTD Data Documentation

Documentation for ctd data collected on R.V. Clupea cruise 10/1996 (5 - 14 July 1996) by Fisheries Research Services, Aberdeen.

The temperature and salinity data were collected using a Chelsea instrument which was calibrated using bottle samples and thermometer readings to produce the following equations:

T(cal) = T(obs)
C(cal) = 1.023995C(obs) - 0.885865

For any 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 1096C
Departure Date 1996-07-05
Arrival Date 1996-07-14
Principal Scientist(s)Phil A Gillibrand (Scottish Office Agriculture Environment and Fisheries Department Aberdeen Marine Laboratory)
Ship FRV Clupea

Complete Cruise Metadata Report is available here

Fixed Station Information

No Fixed Station Information held for the Series

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