Metadata Report for BODC Series Reference Number 84472
Metadata Summary
Problem Reports
Data Access Policy
Narrative Documents
Project Information
Data Activity or Cruise Information
Fixed Station Information
BODC Quality Flags
SeaDataNet Quality Flags
Metadata Summary
Data Description |
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Time Co-ordinates(UT) |
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Spatial Co-ordinates | |||||||||||||||||||||||||
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Parameters |
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Problem Reports
No Problem Report Found in the Database
Data Access Policy
Academic domain data
These data have no specific confidentiality restrictions for academic 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 data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."
Narrative Documents
Howaldtswerke-Deutsche Werft Bathysonde CTD profiler
A self-contained conductivity-temperature-pressure profiler developed in the 1970s. The unit could be equipped with a remotely controlled Nansen bottle and thermometer frame to provide water samples and independent temperature measurements. Data were digitised in the underwater unit by means of a set of mechanical relays, thereby limiting the sampling frequency to <2 Hz. Pressure and conductivity were sampled simultaneously, while temperature was subject to a 60 ms delay in order to correct for the sensor time constant.
Specifications
Pressure | Temperature | Conductivity | |
---|---|---|---|
Range | 800 or 6000 dbar | unknown | 0 to 80 mmho cm-1 |
Precision | ± 0.25% of total range | ± 0.01 °C | ± 1.5 ‰ |
Resolution | 1 dbar or better | 0.01 °C | 0.01 mmho cm-1 |
FS Meteor Cruise 36 STD Data Documentation
Introduction
Documentation for STD data collected on FS Meteor 36 (January - February 1975) by the Institute fur Meereskunde, Kiel, Federal Republic of Germany.
This was a cruise in conjunction with scientists on board the UK research ship RRS Discovery (Cruise 69). It was organised jointly by the Institute of Oceanographic Sciences and the University of Liverpool, Department of Oceanography in the UK and the Institute fur Meereskunde, Kiel, Germany.
Instrumentation
The instrument used was a Bathysonde Salinity-Temperature-Depth system.
Calibration and Data Processing
The calibrations curves for the Bathysonde were determined to be:
- T(true) = 1.00875 * T(obs) - 0.0534 °C
- C(true) = 1.00514 * C(obs) - 0.2185 mmho/cm
These were based on a few water bottle casts only, performed for the purpose of calibration. After calibration against the water bottle observations the STD data were despiked, smoothed and interpolated to 2m depth intervals.
Sampling
Stations were identified by their 4 digit station number.
Caution
For the following 3 stations the water depth given was less than the maximum depth of the instrument by more then 10 per cent. The water depths has been set null in the series header, but their values are noted below:
Station | Water depth | Maximum Instrument Depth |
---|---|---|
3663 | 49m | 56m |
3664 | 34m | 44m |
3683 | 85m | 94m |
Reference
Brockmann, C., Hughes, P. and Tomczak, M. (1977).
Data report on currents, winds and stratification in the North-west African upwelling region during early 1975. Berichte aus dem Institute fur Meereskunde No. 32.
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Cruise
Cruise Name | MT36 |
Departure Date | 1975-01-14 |
Arrival Date | 1975-03-03 |
Principal Scientist(s) | |
Ship | FS Meteor |
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 |