Metadata Report for BODC Series Reference Number 1836869
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 JR16001 (AMT26) Meteorology Data Quality Document
Air temperature, relative humidity and atmospheric pressure
There was good agreement between the two sensors for each of pressure, air temperature and relative humidity. There were several spikes in the humidity channel which were flagged as unrealistic.
Light sensors
Overall, there was good agreement between both of the PAR sensor readings, though IRRDSV01 channel generally reports slightly higher values than PARERXSD. There are some null cycles throughout the channels.
The TIR sensors did not record any data during the course of the cruise. As the channels were not recording data, they were removed from the final dataset.
Wind Channels
As the gyrocompass did not log any heading data, the true wind speed and direction could not be derived and are not available for this cruise. Only the relative wind speed and direction channels are available.
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
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 & 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
RRS James Clark Ross Cruise JR16001 (AMT26) Meteorology Instrument Description Document
The meteorological suite of sensors is located on the bow at 22 m height. The 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) | I61952 | 19/04/2016 |
Kipp and Zonen (sensor 2) | SPLite 2 | Total Incident Radiation (TIR) | I61953 | 19/04/2016 |
Kipp and Zonen (sensor 1) | Proto Quantum Spectra 1 (PQS1) | Photosynthetically Active Radiation (PAR) | 150813 | 04/11/2015 |
Kipp and Zonen (sensor 2) | Proto Quantum Spectra 1 (PQS1) | Photosynthetically Active Radiation (PAR) | 150814 | 04/11/2015 |
Rotronic | MP402H-050300 | Air temperature and relative humidity (port) | 0061606138 | 25/05/2016 |
Rotronic | MP402H-050300 | Air temperature and relative humidity (starboard) | 0060743896 | 25/05/2016 |
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 JR16001 (AMT26) Meteorology Processing Procedures Document
Originator's Data Processing
Meterological data were measured from instruments located on the RRS James Clark Ross meterological mast. The data streams were logged every second to the SCS system and merged into comma separated file formats (.ACO). The instruments logged the meterological data to the oceanlogger and anemometer ACO files and the header information was stored in the corresponding .TPL files. The start and end times of the meterological files are shown in the table below.
Filename | Content Discription | Format | Interval | Start date | Start Time | End date | End Time |
oceanlogger.ACO |
| ASCII (.ACO) | ~5 sec | 19/09/2016 | 11:49:39 | 03/11/2016 | 15:33:50 |
Anemometer.ACO | Relative wind speed and direction | ASCII (.ACO) | ~1 sec | 17/09/2016 | 09:00:45 | 03/11/2016 | 15:25:19 |
BODC Data Processing
The files were reformatted to BODC internal format using standard data banking procedures. All files were averaged to 60 second intervals. The following table shows how the variables within the files were mapped to appropriate BODC parameter codes.
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 | TIR sensors were not recording during the cruise. |
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 | TIR sensors were not recording during the cruise. |
anemometer.ACO | wind_dir | Degrees | Wind direction (relative to moving platform) in the atmosphere by in-situ anemometer | ERWDSS01 | Degrees | - |
anemometer.ACO | wind_speed | m s-1 | Wind speed (relative to moving platform) in the atmosphere by in-situ anemometer | ERWSSS01 | m s-1 | - |
Wind sensors
True wind speed and direction would normally be derived using the relative wind speed and direction, the ship's north-south and east-west velocities and the ship's heading. Unfortunately, the heading was not recorded during the cruise so true wind speed and direction could not be derived.
Calibrations
No calibrations were applied to the meteorological data.
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Cruise
Cruise Name | JR16001 (AMT26) |
Departure Date | 2016-09-20 |
Arrival Date | 2016-11-04 |
Principal Scientist(s) | Andrew Rees (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 |