Metadata Report for BODC Series Reference Number 47326
Metadata Summary
Problem Reports
Data Access Policy
Narrative Documents
Project Information
Data Activity or Cruise Information
Fixed Station Information
BODC Quality Flags
Metadata Summary
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Time Co-ordinates(UT) |
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Parameters |
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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
IOS Mk IV Pressure Recorder
This instrument was developed at I.O.S. Bidston and is a deep water pressure recorder (i.e. used at depths between 300m and 5000m). Each recorder consists of one or two Bell and Howell strain gauges and/or a Digiquartz pressure sensor and a temperature sensor.
The sensors are interfaced into a Seadata cassette recording system. Sampling is usually every 3.75 minutes with the integration period equal to the sampling interval, but may be set to other sampling intervals. For example with a 3 second sampling interval and integration period the instrument may be used as a wave recorder.
The recorder is housed in a tubular aluminium frame 1.3m in diameter by 1.4m in height attached to a disposable steel ballast weight. The data logger together with the associated battery supply is lowered into a central 15cm (internal diameter) aluminium tube. Sensors are mounted externally with Marsh Marine connectors. The assembly free falls to the sea floor. An acoustic release system is used to separate the ballast weight and buoyancy is provided by Corning glass spheres attached to the aluminium frame.
Data Processing Notes
Clock lost 64 seconds over 204 days 1 hour 38 minutes 34 seconds; original cycle interval and time values have been corrected.
Instrument characteristics
Station E3
| OSTG Mark IV | No. 1 |
|---|---|
| Sensors | B+H2 DQ 2262 (BODC series reference 47326) |
| Nominal sampling interval | 225 seconds |
| Integration period | 225 seconds |
| Actual sampling interval | 3.750014 minutes |
IOS Data Processing of Off-Shore Pressure Recorder Data
Data processing consists of two stages:-
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Pressures have been sample rate reduced from the basic time step of the recorder to produce the hourly values and have been interpolated by a cubic spline to generate the value on cardinal hours.
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Instrumental drift has been removed and the drift free series is produced with an artificial mean value, usually of 100mbar.
Project Information
Continental Slope Experiment (CONSLEX)
The Continental Slope Experiment (CONSLEX) was a collaborative exercise between the Institute of Oceanographic Sciences, Scottish Marine Biological Association, Department of Agriculture and Fisheries for Scotland and the Ministry of Agriculture, Fisheries and Food designed to study water movements across the Scottish continental slope.
The experiment ran from August/September 1982 to February/March 1983. The deployments, mainly current meter moorings, were made along a set of lines defined thus:
| Line | Position | Number of moorings |
|---|---|---|
| P | 51° 41' N,15° 26' W to 51° 41' N,14° 55' W | 4 |
| A | 57° 18' N,09° 53' W to 57° 23' N,08° 30' W | 9 |
| B | 58° 11' N,09° 57' W to 57° 57' N,08° 50' W | 7 |
| C | 59° 11' N,07° 43' W to 59° 00' N,07° 22' W | 6 |
| D | 59° 46' N,06° 16' W to 59° 37' N,05° 58' W | 4 |
| E | 60° 31' N,05° 00' W to 60° 05' N,04° 29' W | 5 |
| F | 61° 27' N,02° 13' W to 61° 08' N,01° 33' W | 6 |
| G | 63° 07' N,00° 00' W to 61° 30' N,00° 00' W | 6 |
Bottom-mounted pressure gauges were deployed at either end of lines A-G and four temporary tide gauges were installed from Sligo (Eire) to Shetland. The current meter temperature sensors were supplemented by three thermistor chain deployments.
Data Activity or Cruise Information
No Data Activity or Cruise Information held for the Series
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 |
