Metadata Report for BODC Series Reference Number 756294
No Problem Report Found in the Database
Open Data supplied by Natural Environment Research Council (NERC)
You must always use the following attribution statement to acknowledge the source of the information: "Contains data supplied by Natural Environment Research Council."
Lockheed Martin Sippican T-5 XBT Probe
The Expendable Bathythermograph system uses a sea water ground. As soon as an electrode within the nose of the expendable probe makes contact with the water, the circuit is complete and temperature or sound velocity data can be telemetered to the ship-board data processing equipment. The T-5 XBT Probe can be used within a maximum depth of 1830 m, with a rated ship speed of 6 knots and has a vertical resolution of 65 cm.
Manufacturer specifications can be found here
The data arrived at BODC in 25 ASCII format files representing the casts taken during JR20080415. Files were reformatted to BODC's internal format (subset of NETCDF) and mapped to appropriate BODC parameter codes:
|Originator's Variable||Units||Description||BODC Parameter Code||Units||Comments|
|Depth||m||Depth of instrument||DEPHCV01||m||-|
|Sound Velocity||ms -1||Velocity of sound through water column||SVELVP01||ms -1||-|
|Temperature||°C||Temperature of water||TEMPET01||°C||-|
The reformatted data were visualised using the in-house EDSERPLO software. Suspect data were marked by adding an appropriate quality control flag. Missing data values were changed to the missing data value and assigned a BODC data quality flag.
XBT Unit and Auxiliary Sensors
|Terminal depth||1830 m|
|Depth Coeff. 1||0.0|
|Depth Coeff. 2||6.828|
|Depth Coeff. 3||-0.00182|
|Depth Coeff. 4||0.0|
|Pressure Pt. Correction||100.0%|
BAS Long Term Monitoring and Survey
The Long Term Monitoring and Survey project (LTMS) has been running since the British Antarctic Survey (BAS) was created. This project is one of the BAS core projects, with several groups of scientists collecting various types of data e.g biological, geological, atmospheric, among others.
Data collection is achievable through a wide scope of instruments and platforms, e.g. the Antarctic research stations, autonomous instrument platforms deployed on or from BAS research ships, BAS aircrafts, satellite remote sensing and others.
This project was implemented in order to measure change and variability in the Earth system. Its long term duration allows for the monitoring of processes that could be missed in shorter term studies and experiments. The data collected is also used to check and improve the reliability of models used to stimulate and predict the behavior of the Earth system.
The main objectives are:
- Topographic survey
- Geosciences survey
- Biological survey and monitoring
- Atmospheric and oceanographic monitoring
The data sets obtained through this project are available to the academic community.
|Cruise Name||JR20080415 (JR186, JR214, JR222, JR223)|
|Principal Scientist(s)||Paul Provost (National Marine Facilities Sea Systems), Sophie Fielding (British Antarctic Survey)|
|Ship||RRS James Clark Ross|
Complete Cruise Metadata Report is available here
No Fixed Station Information held for the Series
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
|<||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.)|
|E||End of CTD Down/Up Cast|
|G||Non-taxonomic biological characteristic uncertainty|
|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|
|O||Improbable value - user quality control|
|0||no quality control|
|2||probably good value|
|3||probably bad value|
|6||value below detection|
|7||value in excess|
|A||value phenomenon uncertain|
|Q||value below limit of quantification|