Metadata Report for BODC Series Reference Number 1762304
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 Clark Ross Cruise AMT23 JR300 JR20131005 Meteorology Data Quality Document
The meteorology data have been through BODC quality control screening.
Wind Channels
The relative wind speed and direction channels showed natural variation and fluctuation but there were no trends that stood out as unrealistic. Several data points were flagged where a shift in the ship's heading corresponded to a spike in corrected wind speed or direction. Overall the data for the cruise duration appeared good.
Air temperature, humidity and pressure channels
There was good agreement between the two sensors for each of pressure, air temperature and relative humidity. There did not appear to be any obvious influence of heading (and hence the ship's infrastructure) on the values of these channels.
Light Channels
Irradiance channels IRRDSV01, CSLRR101 and CSLRR102 were flagged where the data values went below zero during the night. Flags were applied sparingly, as as it was unclear whether the variation was due to changing cloud cover or other causes. PAR channel PARERXSD seems to be returning values slightly higher than IRRDSV01, but only marginally and TIR channel CSLRR101 appeared to be returning values slightly lower than channel CSLRR102 but again, only marginally. Overall, there was good agreement in both the TIR and PAR patterns and trends observed, and the range of values appeared appropriate.
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
Kipp & Zonen Photosynthetically Active Radiation Quantum Sensor PQS1
The PQS1 is an atmospheric radiometer designed to measure incident radiation at photosynthetically active radiation (PAR) wavelengths. It incorporates a diffuser with an excellent directional (cosine) response and a silicon photodiode detector.
If used in field research applications, the PQS1 can be connected with the METEON handheld display unit, which also as data-logging capability. For permanent installations, it can be connected to the LOGBOX SD data logger.
Specifications
| Spectral range | 400 to 700 nm (± 4 nm) |
| Sensitivity | 4 to 10 µV µmol-1 m-2 s-1 |
| Response time | < 1 µs |
| Non linearity | < 1% (0 to 10000 µV µmol-1 m-2 s-1) |
| Temperature dependence | < -0.1% °C-1 |
| Sensitivity change per year | < 2% |
| Directional error | < 3% (up to 80° zenith angle) |
| Field of view | 180° |
| Operating temperature | -30 to 70°C |
| Relative humidity | 0 to 100 % RH |
A link to the PQS1 specification sheet can be found here: PQS1 Spec sheet
Kipp and Zonen SP Lite and SP Lite2 Silicon Pyranometer
An atmospheric pyranometer that measures solar radiation over the range 400-1100 nm by means of a silicon photo-diode detector mounted in a diffuser. The sensor measures the radiation received over the entire hemisphere and the diffuser's sensitivity is proportional to the cosine of the angle of incidence of the incoming radiation. The photodiode creates a voltage output that is proportional to the incoming radiation. The SP Lite2 supersedes the SP Lite and features an improved sensitivity and faster response time than its predecessor.
Specifications
| Specification | SP Lite | SP Lite2 |
|---|---|---|
| Spectral range | 400-1100 nm | 400-1100 nm |
| Sensitivity | 100 µV W-1 m-2 | 60 to 100 µV W-1 m-2 |
| Response time | < 1 s | < 500 ns |
| Maximum irradiance | 2000 W m-2 | 2000 W m-2 |
| Operating temperature | -30 to 70°C | -30 to 70°C |
| Temperature dependence | 0.15% °C-1 | 0.15% °C-1 |
Further details can be found in the manufacturer's specification sheets for the SP Lite and SP Lite2.
RRS James Clark Ross Cruise AMT23 JR300 JR20131005 Meteorology Instrument Description Document
Meteorology (HIMET)
| Manufacturer | Model | Sensor | Serial number | Last calibration date |
| Kipp and Zonen | SPLite 2 | Total Incident Radiation | 112993/112992 | 26/01/2011 |
| Kipp and Zonen | Proto Quantum Spectra 1 | Photosynthetically Active Radiation | 110127/110126 | 05/01/2011 |
| Rotronic | MP402H-050300 | Air temperature and relative humidity | 0060743898 | 16/03/2011 |
| Vaisala | PTB210 Class B | Digital barometer | V1450002/03 | 10/04/2000 |
| - | - | Anemometer | - | - |
Rotronic Hygromet MP102H and MP402H temperature and humidity probes
This meteorological probe measures humidity and temperature with the plug-in HygroClip HC2-S3 sensor module, and can also be equipped with a signal conditioned Pt100 temperature probe.
The two models differ in that the MP102H produces a voltage output while the MP402H produces a current output. Other characteristics are common to both models.
The specification sheet can be accessed here Rotronic MP102H and MP402H.
Specifications
| Start up time | 3 s (typical) |
| Data refresh time | 1 s (typical) |
| Humidity range | 0 to 100% RH |
| Humidity accuracy | 0.8% RH |
| Temperature range | -40 to 80°C |
| Temperature accuracy | 0.1°C |
| Maximum air velocity ar probe | 20 m s-1 |
| User configurable limits | -999 to 9999 engineering units |
| HC2-S3 Probe material | Polycarbonate |
| Probe dust filter | Polyethylene |
Vaisala PTB210 Digital Barometer
The basic specifications for this pressure sensor are as follows:
- Manufacturer: Vaisala
- Type: Silicon capacitive sensor
- Model: PTB210
- Range: 900 - 1100 hPa
- Output: 0-5VDC
- Total Accuracy (20°C): ±0.30hPa
- Operating temperature: -40 to +60 deg C
- Weight: 110g
- Certification Ingress Protection: IP65
Further details can be found in the manufacturer's specification sheet.
RRS James Clark Ross Cruise AMT23 JR300 JR20131005 Meteorology Processing Procedures Document
Originator's Data Processing
Meterological data were measured from instruments located on the RRS James Clark Ross meterological mast. TIR data originated from the Kipp and Zonen SPLite2 whilst the PAR data originated from the Kipp and Zonen PQS1. Air temperature and humidity data came from the Rotronic MP402H and wind data were obtained from an anemomenter.
The data streams were logged every second to the SCS system and merged into a comma separated file format (.ACO) whereas the header information was stored in .TPL files.
The instruments logged the meterological data to the oceanlogger and anemometer files. The files exhibited the same first four columns as outlined above for the navigation files. The remaining columns in the oceanlogger file have the following structure: airtemp1 (Celsius), humidity1 (%RH), par1 (µmol s-1 m-2), tir1 (W m-2), airtemp2 (Celsius), humidity2 (%RH), par2 (µmol s-1 m-2), tir2 (W m-2) followed by the underway sea surface hydrography columns. The Anemometer file contained data columns: wind direction (degrees), wind speed (knots). The start and end times of the meterological files are shown in the table below.
| Filename | Start date | Start Time | End date | End Time |
| oceanlogger.ACO | 07/10/2013 | 07:50:43 | 08/11/2013 | 13:03:32 |
| Anemometer.ACO | 07/10/2013 | 07:50:43 | 08/11/2013 | 13:01:30 |
BODC Data Processing
Meteorological parameters were matched to BODC parameter codes and transferred to internal BODC format as outlined in the table below. Unit conversions were applied to data that were supplied in knots, as all other units were equivalent to the respective BODC parameter code units assigned. BODC processing procedures included loading of data and reduction through averaging, unit conversions, visual screening and flagging of anomalous values.
| Originator's file and parameter | Units | Description | BODC parameter | Units | Comments |
| oceanlogger.ACO, baro1 | hPa | Pressure (measured variable) exerted by the atmosphere by barometer and expressed at measurement altitude | CAPHTU01 | mbar | Units are equivalent |
| oceanlogger.ACO, baro2 | hPa | Pressure (measured variable second sensor) exerted by the atmosphere by barometer and expressed at measurement altitude | CAPHTU02 | mbar | Units are equivalent |
| oceanlogger.ACO, airtemp1 | °C | Temperature (second sensor) of the atmosphere by dry bulb thermometer | CDTASS01 | °C | - |
| oceanlogger.ACO, airtemp2 | °C | Temperature (second sensor) of the atmosphere by dry bulb thermometer | CDTASS02 | °C | - |
| oceanlogger.ACO, humidity1 | % | Relative humidity (second sensor) of the atmosphere | CRELZZ01 | % | - |
| oceanlogger.ACO, humidity2 | % | Relative humidity (second sensor) of the atmosphere | CRELZZ02 | % | - |
| oceanlogger.ACO, par1 | µmol m-2 s-1 | Downwelling vector irradiance as photons (PAR wavelengths) in the atmosphere by cosine-collector radiometer | IRRDSV01 | µE m-2 s-1 | Units are equivalent |
| oceanlogger.ACO, par2 | µmol m-2 s-1 | Downwelling vector irradiance as photons (PAR wavelengths) in the atmosphere by cosine-collector radiometer | PARERXSD | µE m-2 s-1 | Units are equivalent |
| oceanlogger.ACO, tir1 | W m-2 | Downwelling vector irradiance as energy (solar (300-3000 nm) wavelengths) in the atmosphere by pyranometer | CSLRR101 | W m-2 | - |
| oceanlogger.ACO, tir2 | W m-2 | Downwelling vector irradiance as energy (solar (300-3000 nm) wavelengths) in the atmosphere by pyranometer | CSLRR102 | W m-2 | - |
| anemometer.ACO, wind_dir | Degrees | Wind direction (relative to moving platform) in the atmosphere by in-situ anemometer | ERWDSS01 | Degrees | - |
| anemometer.ACO, wind_speed | knots | Wind speed (relative to moving platform) in the atmosphere by in-situ anemometer | ERWSSS01 | m s-1 | * 0.514444 |
| - | - | Wind speed in the atmosphere by in-situ anemometer | EWSBSS01 | m s-1 | Channel derived using BODC Matlab routine 'wincor' |
| - | - | Wind direction in the atmosphere by in-situ anemometer | EWDASS01 | Degrees true | Channel derived using BODC Matlab routine 'wincor' |
Wind channels
The BODC Matlab procedure 'wincor' was run using the relative wind speed (ERWSSS01) and direction (ERWDSS01) and ship's north-south and east-west velocities, with the vane set to 0 degrees at the bow. This program generated the absolute wind speed (EWSASS01) and direction (EWDASS01).
Sample Calibrations
No calibrations were applied to the meteorology channels by BODC.
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Cruise
| Cruise Name | JR20131005 (AMT23, JR300) |
| Departure Date | 2013-10-01 |
| Arrival Date | 2013-11-11 |
| Principal Scientist(s) | Mikhail V Zubkov (National Oceanography Centre, Southampton) |
| 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 |
