Metadata Report for BODC Series Reference Number 1762377
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 JR15001 (AMT25, JR864) 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 pressure, temperature and humidity 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. Clear spikes in the data were flagged as unrealistic.
Irradiance Channels
Irradiance channels IRRDSV01 and PARERXSD were flagged where the data values went below zero during the night. A possible reason for these negative values is radiation loss at night from the sensors. Data above 2500 microeinsteins have also been flagged as these values were outside the expected range for the parameters. Overall, there was good agreement between both of the PAR sensor readings and the range of values appeared appropriate.
The two TIR sensors were off line for the duration of the cruise and did not report any good quality data. These channels were not transferred to the final series.
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
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 JR15001 (AMT25, JR864) Meteorology Instrument Description Document
Instrumentation
The meteorological instruments used to collect this dataset are displayed in the table below.
| Manufacturer | Model | Main Function | Serial number | Last calibration date |
| Kipp and Zonen (sensor 1) | SPLite 2 | Total Incident Radiation (TIR) | 112993 | 26/01/2011 |
| Kipp and Zonen (sensor 2) | SPLite 2 | Total Incident Radiation (TIR) | 112992 | 01/06/2015 |
| Kipp and Zonen (sensor 1) | Proto Quantum Spectra 1 (PQS1) | Photosynthetically Active Radiation (PAR) | 110127 | 05/01/2011 |
| Kipp and Zonen (sensor 2) | Proto Quantum Spectra 1 (PQS1) | Photosynthetically Active Radiation (PAR) | 110126 | 05/01/2011 |
| Rotronic | MP402H-050300 | Air temperature and relative humidity (port) | 0060743898 | 27/04/2011 |
| Rotronic | MP402H-050300 | Air temperature and relative humidity (starboard) | 0060743896 | 27/04/2011 |
| Vaisala | PTB210 Class B | Digital barometer | V1450003 | 10/04/2000 |
| Vaisala | PTB210 Class B | Digital barometer | V1450002 | 10/04/2000 |
| Windobserver | 70 | 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 JR15001 (AMT25, JR864) Meteorology Processing Document
Originator's Data Processing
Meteorological data were measured from instruments located on the RRS James Clark Ross meteorological 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 anemometer.
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 meteorological 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 meteorological files are shown in the table below.
| Filename | Content Description | Format | Interval | Start date | Start Time | End date | End Time |
| oceanlogger.ACO |
| ASCII (.ACO) | ~1-2 minutes | 15/9/2015 | 14:18:00 | 04/11/2015 | 14:50:40 |
| Anemometer.ACO | Relative wind speed and direction | ASCII (.ACO) | ~1 sec | 14/09/2015 | 16:54:54 | 04/11/2015 | 14:48:45 |
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 | Originator's Parameter | Originator's Units | Description | BODC parameter | BODC Units | Comments and unit conversions |
| 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 | CDTAZZ01 | °C | - |
| oceanlogger.ACO | airtemp2 | °C | Temperature (second sensor) of the atmosphere by dry bulb thermometer | CDTAZZ02 | °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 | Channel is poor quality. |
| 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 | Channel is poor quality. |
| 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).
Calibrations
No sample or manufacturers calibrations were applied to these data.
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Cruise
| Cruise Name | JR15001 (AMT25, JR864) |
| Departure Date | 2015-09-15 |
| Arrival Date | 2015-11-04 |
| Principal Scientist(s) | David Barnes (British Antarctic Survey), Jonathan Sharples (University of Liverpool Department of Earth, Ocean and Ecological Sciences), Tim Smyth (Plymouth Marine Laboratory) |
| 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 |
