Metadata Report for BODC Series Reference Number 2309286
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
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Problem Reports
No Problem Report Found in the Database
RRS James Cook Cruise JC062 Underway meteorology: Data Quality Report
Head-on relative winds appeared more noisy, although this was not conclusive. Therefore, relative wind speeds and directions from the stern (~180°) should be visually examined before use. The data were not flagged. (BODC assessment)
The starboard PAR sensor serial number was not recorded during the cruise and the sensor was calibrated with manufacturer's coefficients that were accurate for the surrounding cruises (s/n 28560). Following manufacturer's calibration, an offset observed between port-side and starboard-side sensors which may indicate the calibration may be suspect. Consequently, the channels were not merged to eliminate the effects of shading (BODC assessment)
Data Access Policy
Open 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.
If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:
"Contains public sector information licensed under the Open Government Licence v1.0."
Narrative Documents
Gill Instruments Windsonic Anemometer
The Gill Windsonic is a 2-axis ultrasonic wind sensor that monitors wind speed and direction using four transducers. The time taken for an ultrasonic pulse to travel from the North to the South transducers is measured and compared with the time for a pulse to travel from South to North. Travel times between the East and West transducers are similarly compared. The wind speed and direction are calculated from the differences in the times of flight along each axis. This calculation is independent of environmental factors such as temperature.
Specifications
| Ultrasonic output rate | 0.25, 0.5, 1, 2 or 4 Hz |
| Operating Temperature | -35 to 70°C |
| Operating Humidity | < 5 to 100% RH |
| Anemometer start up time | < 5 s |
| Wind speed | |
| Range | 0 to 60 m s-1 |
| Accuracy | ± 2% at 2 m s-1 |
| Resolution | 0.01 m s-1 |
| Response time | 0.25 s |
| Threshold | 0.01 m s-1 |
| Wind direction | |
| Range | 0 to 359° |
| Accuracy | ± 3° at 12 m s-1 |
| Resolution | 1° |
| Response time | 0.25 s |
Further details can be found in the manufacturer's specification sheet.
Kipp and Zonen Pyranometer Model CM6B
The CM6B pyranometer is intended for routine global solar radiation measurement research on a level surface. The CM6B features a sixty-four thermocouple junction (series connected) sensing element. The sensing element is coated with a highly stable carbon based non-organic coating, which delivers excellent spectral absorption and long term stability characteristics. The sensing element is housed under two concentric fitting Schott K5 glass domes.
Specifications
| Dimensions (W x H) | 150.0 mm x 91.5 mm |
|---|---|
| Weight | 850 grams |
| Operating Temperature | -40°C to +80°C |
| Spectral Range | 305 - 2800 nm (50% points) |
| Sensitivity | 9 -15 µV/W/m2 |
| Impedance (nominal) | 70 - 100 ohm |
| Response Time (95%) | 30 sec |
| Non-linearity | < ± 1.2% (<1000 W/m2) |
| Temperature dependence of sensitivity | < ± 2% (-10 to +40°C) |
| Zero-offset due to temperature changes | < ± 4 W/m2 at 5 K/h temperature change |
Skye Instruments PAR Energy Sensor Model SKE 510
The SKE 510 is suitable for measuring photosynthetically active radiation (PAR) from natural or artificial light sources. The sensor is fully waterproof and guaranteed submersible to 4m depth, and indoor versions are also available.
The instrument uses a blue-enhanced planar diffused silicon detector to measure energy (in W m-2) over the 400-700 nm waveband. It has a cosine-corrected head and a square spectral response. The sensor can operate over a temperature range of -35 to 70 °C and a humidity range of 0-100% RH.
Specifications
| Sensitivity (current) | 1.5µA or 100 W m-2 |
|---|---|
| Sensitivity (voltage) | 1mV or 100 W m-2 |
| Working Range | 0-5000 W m-2 |
| Linearity error | 0.2% |
| Absolute calibration error | typ. less than 3% 5% max |
| Response time - voltage output | 10 ns |
| Cosine error | 3% |
| Azimuth error | less than 1% |
| Temperature co-efficient | ±0.1% per °C |
| Internal resistance - voltage output | c. 300 ohms |
| Longterm stability | ±2% |
| Material | Dupont 'Delrin' |
| Dimensions | 34 mm diameter 38mm height |
| Cable | 2 core screened 7 - 2 - 2C |
| Sensor Passband | 400 - 700 nm |
| Detector | Silicon photocell |
| Filters | Glass type and/or metal interference |
Vaisala HMP 45 humidity and temperature probe
A humidity and temperature sensor designed for use with the HMI41 Humidity Indicator to measure temperature and humidity, as well as dew point, wet bulb temperature, absolute humidity and mixing ratio. It is also suitable for spot-checking applications. The HMP45 probe is attached to the HMI141 Indicator via a spiral cable. The HMP45 probe features a patented HUMICAP 180 capacitive thin film polymer humidity sensor and a Pt1000 platinum resistance thermometer. The HMP45 measures humidity from 0-100 percent RH at an accuracy of +/- 3 percent RH at 20 degC. It measures temperature from -20 to +60 degC.
For more information, please see this document: https://www.bodc.ac.uk/data/documents/nodb/pdf/Vaisala_HMP_41_42_45.pdf
Vaisala PTB110 barometer
An industrial, analog barometer which uses a silicon capacitive sensor (BAROCAP). The sensor produces either frequency or voltage output and is mountable on a (35 mm wide) DIN rail.
Operating ranges (1 hPa = 1 mbar)
| Pressure ranges | 500 ... 1100 hPa 600 ... 1100 hPa 800 ... 1100 hPa 800 ... 1060 hPa 600 ... 1060 hPa |
| Temperature range | -40 ... +60 °C (-40 ... +140 °F) |
| Humidity range | non-condensing |
General
| Output voltage | 0 ... 2.5 VDC 0 ... 5 VDC |
| Output frequency | 500 ... 1100 Hz |
| Resolution | 0.1 hPa |
Accuracy
| Linearity* | ±0.25 hPa |
| Hysteresis* | ±0.03 hPa |
| Repeatability* | ±0.03 hPa |
| Pressure calibration uncertainty** | ±0.15 hPa |
| Accuracy at +20 °C*** | ±0.3 hPa |
| Total accuracy at: | |
| +15 ... +25 °C (+59 ... +77 °F) 0 ... +40 °C (+32 ... +104 °F) -20 ... +45 °C (-4 ... +113 °F) -40 ... +60 °C (-40 ... +140 °F) | ±0.3 hPa ±0.6 hPa ±1.0 hPa ±1.5 hPa |
* Defined as ±2 standard deviation limits of end-point non-linearity, hysteresis error or repeatability error.
** Defined as ±2 standard deviation limits of inaccuracy of the working standard including traceability to NIST.
*** Defined as the root sum of the squares (RSS) of end-point non-linearity, hysteresis error, repeatability error and calibration uncertainty at room temperature when using voltage output.
More detailed information can be found in the manufacturer's data sheet and user's guide.
RRS James Cook Cruise JC062 Underway meteorology: Instrumentation
The meteorological suite of sensors were located on the foremast, approximately 17.1 m above sea level. The anemometer was orientated 0° on the bow.
| Sensor | Serial number | Last calibration date |
| Vaisala PTB110 barometer | G0820001 | 23/2/2011 No offset observed by manufacturer |
| SKYE SKE510 Energy PAR Sensor (port) | 38884 | 25/11/2010 |
| SKYE SKE510 Energy PAR Sensor (starboard) | 28560* | 29/4/2009 |
| Gill Windsonic Anemometer Option 3 | 064537 | No calibration required 0° on bow** |
| Vaisala HMP45A Temperature and Humidity | D1440038 | 30/9/2010 Offset applied at manufacturer |
| Kipp & Zonen Pyranometer CMB6 (port) | 994133 | 9/8/2010 |
| Kipp & Zonen Pyranometer CMB6 (starboard) | 994132 | 9/8/2010 |
*Serial no. determined from surrounding cruises. **determined from orientation on JC063
RRS James Cook Cruise JC062 Underway meteorology: BODC processing
surfmet was selected for transfer into BODC format since it contained the most processed meteorological data. The data was reformatted to NetCDF using BODC standard data banking procedures. The following table shows how variables within the file were mapped to appropriate BODC parameter codes:
yyyymmdd-051010-MET-DY-SM_DY1.SURFMETv2
| Originator's variable | Originator's units | Description | BODC Code | BODC Units | Unit conversion | Comments |
| temp_h | Degrees Celsius | Housing temperature | - | - | Transferred elsewhere | |
| temp_r | Degrees Celsius | Hull temperature (SST) | - | - | Transferred elsewhere | |
| cond | S m-1 | Conductivity | - | - | Transferred elsewhere | |
| fluo | Volts | Raw fluorometer output | - | - | Transferred elsewhere | |
| trans | Volts | Raw transmissometer output | - | - | Transferred elsewhere | |
| press | hPa | Air pressure | CAPHTU01 | mbar | 1 hPa = 1 mbar | |
| ppar | Volts x 105 | Raw PAR sensor output (port) | DVLTRPSD | Volts | x 10-5 | |
| spar | Volts x 105 | Raw PAR sensor output (starboard) | DVLTRSSD | Volts | x 10-5 | |
| speed | m s-1 | Relative wind speed | ERWSSS01 | m s-1 | - | |
| direct | Degrees | Relative wind direction | ERWDSS01 | Degrees | - | |
| airtemp | Degrees Celsius | Air temperature (dry) | CDTASS01 | Degrees Celsius | - | |
| humidity | Percent | Relative humidity | CRELSS01 | Percent | - | |
| ptir | Volts x 105 | Raw TIR sensor output (port) | CVLTRP01 | Volts | x 10-5 | |
| stir | Volts x 105 | Raw TIR sensor output (starboard) | CVLTRS01 | Volts | x 10-5 |
All data expressed at measurement altitude.
The following manufacturer's calibrations were applied to SKYE PAR and Kipp & Zonen TIR light sensors:
| INPUT CODE | Units | Serial no. | OUTPUT CODE | Units | Calibration coefficient |
| DVLTRPSD | volts | 38884 | DWIRRPSD | W m-2 | 10.15 µvolts per W m-2 |
| DVLTRSSD | volts | 28560 | DWIRRSSD | W m-2 | 10.36 µvolts per W m-2 |
| CVLTRP01 | volts | 994133 | CSLRRP01 | W m-2 | 9.70 µvolts per W m-2 |
| CVLTRS01 | volts | 994132 | CSLRRS01 | W m-2 | 11.43 µvolts per W m-2 |
| y (W m-2) = (a x 106)/b | ||||||||||||||||||||||||||||||||||||||||
where 'a' is the raw data in volts and 'b' is number of µV per W m-2
A manufacturer's calibration was not applied to the Vaisala PTB100A barometer (s/n G0820001) because there was no significant offset reported.
Subsequently, the maximum value of the port-side and starboard-side TIR sensors were extracted into a new data channels in order to eliminate the effects of shading. The port-side and starboard-side PAR sensors were not merged because an offset was observed between them. All the data were then visualised using the in-house EDSERPLO software. Suspect data were marked by adding an appropriate quality control flag, missing data by both setting the data to an appropriate value and setting the quality control flag.
True wind speed and direction
The absolute wind speed and direction were calculated from the ship's velocities (CNAV) and gyrocompass heading (POS MV). The anemometer orientation was not provided, however, the orientation on JC063 was reported to be 0° on the bow.
Project Information
Oceans 2025 Theme 10, Sustained Observation Activity 2: Porcupine Abyssal Plain Ocean Observatory
The NERC Delivery Plan (2005) gives priority to developing ocean observing systems to detect climate change and its impact on ecosystems. One of the most effective ways to achieve this is by fixed point time-series eulerian observatories equipped with a diverse array of physical, biological and biogeochemical sensors. The Porcupine Abyssal Plain (PAP) observatory, involving high frequency measurements of both water column and seafloor processes, is the only UK open ocean observatory which meets these criteria. The PAP site has been monitored through a variety of projects since 1989. The National Oceanography Centre, Southampton (NOCS) will manage all monitoring activities at the PAP site for Oceans 2025. Spatial context to Sustained Observation Activity (SO) 2 will be provided by the Atlantic Meridional Transects (AMT) in SO 1 and by a Continuous Plankton Recorder (CPR) route (SO 15) which pass nearby.
More detailed information on this Work Package is available at pages 9 - 11 of the official Oceans 2025 Theme 10 document: Oceans 2025 Theme 10
Weblink: http://www.oceans2025.org/
Data Activity or Cruise Information
Cruise
| Cruise Name | JC062 |
| Departure Date | 2011-07-24 |
| Arrival Date | 2011-08-29 |
| Principal Scientist(s) | Henry Ruhl (National Oceanography Centre, Southampton) |
| Ship | RRS James Cook |
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 |
