Metadata Report for BODC Series Reference Number 1919007
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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Problem Reports
No Problem Report Found in the Database
Data Access Policy
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."
Narrative Documents
Turner Designs 10AU Field Fluorometer
The Turner Designs 10AU is designed for continuous-flow monitoring or discrete sample analyses of fluorescent species. A variety of optical kits with appropriate filters and lamps are available for a wide range of applications. Individual filters and lamps are also available for customised applications.
Standard optical kits include those for chlorophyll-a (extracted and/or in vivo), phycocyanin, phycoerythrin, CDOM, ammonium, rhodamine and fluorescein dye tracing, crude oil, refined oil, histamine and optical brighteners.
The instrument's light source is a 4 watt lamp and the detector is a photomultiplier tube with a standard detection range of 300-650 nm. A red-sensitive version with a detetion range of 185-970 nm is also available.
Specifications
| Operating temperature | 0 to 55°C |
| Detector | PhotoMultiplier Tube 300 to 650 nm (standard) 185 to 870 nm (Red) |
| Detection Limits: Extracted Chlorophyll-a Rhodamine WT Dye Fluorescein Dye | 0.025 µg L-1 0.01 ppb (in potable water) 0.01 ppb (in potable water) |
| Linear range: Extracted Chlorophyll-a Rhodamine WT Dye Fluorescein Dye | 0 to 250µg L-1 0 to 250 ppb 0 to 250 ppb |
Further details can be found in the manufacturer's specification sheet.
Furuno GPS/WAAS Navigator GP32
The GP32 is an advanced GPS navigator with a Wide Area Augmentation System (WAAS) receiver which can receive up to 12 discrete GPS channels, all-in-view, and also has DGPS capabilities.
The WAAS applies correction data by means of geostationary satellites. The reference stations on earth monitor the GPS constellation and route GPS error data to the WAAS satellite via the master earth station.
This equipment is comprised of a compact unit designed for coastal activities with several display modes, e.g. Plotter, Nav Data, Steering, Highway, Speedometer and two other costumisable modes. The data can be viewed in WGS-84 or other geodetic systems.
Specifications
| GPS/WAAS | |
| Receiver type | GPS: 12 discrete channels, C/A code, all-in-view WAAS: standard fitted display unit |
| Receive frequency | L1 (1575.42 MHz) |
| Time to first fix | 12 s (typical) |
| Tracking velocity | 999 knots |
| DGPS | |
| Reference stations | Automatic or manual selection |
| Frequency range | 283.5 to 325 kHz in 0.5 kHz steps |
| Accuracy | |
| GPS | 10 m (95%) |
| DGPS | 5 m (95%) |
| WAAS | 3 m (95%) |
The equipment's specification sheet can be accessed Furuno GP32
BAS_PSPE RRS James Clark Ross Cruise JR20110128 (JR244) Underway Surface Hydrography Instrumentation Document
The surface hydrography instruments used to collect this data set are presented in the table below. All instruments, except the hull temperature sensor, which is located at 7 m depth close to the flow through water input, were located at the ship's preparation laboratory.
| Manufacturer | Model | Sensor | Serial number |
| Sea Bird Electronics | SBE45 | Thermosalinograph | 4524698-0016 |
| Chelsea Technologies | 10 AU-005 | Fluorometer | 6456 RTX |
| Litre Meter | - | Flow meter | 45/59462 |
| Sea Bird Electronics | SBE48 | Hull temperature | - |
Litre Meter flow meter
A flow meter used to monitor water flow rates for pumped systems such as ships' continuous seawater supplies.
Sea-Bird SBE 48 Hull Temperature Sensor
The SBE 48 is a high-accuracy temperature recorder with non-volatile memory, designed for shipboard determination of sea surface temperature. Mounted with magnets just below the water line, the SBE 48's temperature sensor is in contact with the inside of the ship's hull. The SBE 48's internal battery runs the real-time clock and can be used to power the instrument for very short deployments; external power is recommended for typical deployments.
Data are recorded in memory and can also be output in real-time in engineering units. Memory capacity exceeds 4.7 million samples of temperature and time; this yields approximately 54 days of data when sampling every 1 sec.
Specifications
| Range | -5 to +35 °C |
|---|---|
| Initial accuracy | ± 0.002°C |
| Resolution | 0.0001 °C |
| Typical stability (per month) | 0.0002 °C |
| Sampling Speed | Approximately 1 Hz (1 sample/sec), or user-programmable 3-sec to 9-hour intervals |
| Memory | 4.7 million samples (temperature and time) |
Further details can be found in the manufacturer's specification sheet.
SeaBird MicroTSG Thermosalinograph SBE 45
The SBE45 MicroTSG is an externally powered instrument designed for shipboard measurement of temperature and conductivity of pumped near-surface water samples. The instrument can also compute salinity and sound velocity internally.
The MicroTSG comprises a platinum-electrode glass conductivity cell and a stable, pressure-protected thermistor temperature sensor. It also contains an RS-232 port for appending the output of a remote temperature sensor, allowing for direct measurement of sea surface temperature.
The instrument can operate in Polled, Autonomous and Serial Line Sync sampling modes:
- Polled sampling: the instrument takes one sample on command
- Autonomous sampling: the instrument samples at preprogrammed intervals and does not enter quiescence (sleep) state between samples
- Serial Line Sync: a pulse on the serial line causes the instrument to wake up, sample and re-enter quiescent state automatically
Specifications
| Conductivity | Temperature | Salinity | |
|---|---|---|---|
| Range | 0 to 7 Sm-1 | -5 to 35°C | |
| Initial accuracy | 0.0003 Sm-1 | 0.002°C | 0.005 (typical) |
| Resolution | 0.00001 Sm-1 | 0.0001°C | 0.0002 (typical) |
| Typical stability (per month) | 0.0003 Sm-1 | 0.0002°C | 0.003 (typical) |
Further details can be found in the manufacturer's specification sheet.
BAS_PSPE RRS James Clark Ross Cruise JR20110128 (JR244) Underway Surface Hydrography Processing Procedures Document
Originator's Data Processing
The sea surface hydrography measurements were performed by a number of instruments connected to the ship's flow through system and a temperature sensor located near the flow through intake, at the hull, at 7 m depth.
Processing procedures throughout the cruise consisted of data retrieval from the previous 24h and logging those into subdirectories on the ship's intranet system.
One file containing the sea surface data was submitted: Surface temperature by the thermosalinograph and hull sensor, chlorophyll, salinity, conductivity, sound velocity and pump flow rate.
The processing procedures carried out by the originator include:
- check for duplicate dates and times
- standardising time
- check for gaps in data
- check data against defined thresholds
- flagging
- unit conversion
Files delivered to BODC
| Filename | Content description | Format | Interval | Start date/time (UTC) | End date/time (UTC) | Comments |
| jr244_ocl _exactsec | Surface hydrography | ascii | 5s | 19/01/2011 01:13:49 | 16/03/2011 13:04:55 |
BODC Data Processing
The file mentioned above was selected for data banking as it contains the best version of processed surface hydrography data. Data were banked at BODC following standard data banking procedures, including reduction through averaging, checking surface hydrography channels for improbable values and screening the data for anomalous values. The originator's variables were mapped to appropriate BODC parameter codes as follows:
jr244_ocl _exactsec
| Originator's variable | Originator's units | BODC code | BODC units | Comments |
| ThermoSalTemp | degrees C | TMESSG01 | degrees C | Remote sensor |
| SSTemp | degrees C | TEMPHU01 | degrees C | hull sensor |
| Chloro | µg l-1 | CPHLUMTF | mg m-3 | Equivalent units |
| Salinity | PSALSU01 | dimensionless | ||
| Cond | s m-1 | CNDCSG01 | s m-1 | |
| Velocity | m s-1 | SVELSG01 | m s-1 | |
| FlowRate | l min-1 | INFLTF01 | l min-1 |
Screening
Data was screened using in-house software, N flags were applied to absent data.
Project Information
Polar Science for Planet Earth (PSPE)
Introduction
The PSPE programme is the British Antarctic Survey strategic science framework that extends from April 2009 to March 2013. This programme was created to respond to the Natural Environment Research Council (NERC) strategy from 2007 to 2012, and contributes to a major environmental research programme, Living with Environmental Change (LWEC), which comprises a 10 year partnership between the UK's main organisations that fund, carry out and use environmental research and observations and will improve the country's tools and knowledge to build resilience, mitigate problems and adapt to environmental change.
The PSPE programme will focus on key questions that can be answered by research requiring access to the polar regions, developing research and long term monitoring and survey programmes in the Antarctic but also pursuing new bi-polar and Arctic research opportunities. The support given to the research programmes includes: investment in training, development of scientific skills and expertise, maintenance of the existing research infrastructures (research stations, ships, aircraft and laboratories), development of new techniques to collect, transfer, curate and visualize data from and relating to the polar regions.
PSPE consists of 6 programmes:
- Climate: atmospheric science and processes, including climate modelling
- Chemistry and past climate: quaternary climate including ice cores, lake, sediments, marine sediments and tropospheric chemistry
- Ecosystems: dynamics of polar ecosystems in response to the impacts of climate and fisheries
- Environmental Change and Evolution: the Earth system; geological to upper atmosphere, complexities and scales of interactions, controls on biological evolution
- Ice sheets: ice sheet evolution and flow, ice sheet changes and sea level rise
- Oceans: role of the polar oceans in controlling and influencing the Earth system
Data Availability
The data produced during this project are available to the academic community.
Data Activity or Cruise Information
Cruise
| Cruise Name | JR20110128 (JR244) |
| Departure Date | 2011-01-28 |
| Arrival Date | 2011-03-16 |
| Principal Scientist(s) | Robert D Larter (British Antarctic Survey) |
| Ship | RRS James Clark Ross |
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 |
