Metadata Report for BODC Series Reference Number 1794632
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
UK Ocean Acidification (UKOA) RRS James Clark Ross Cruise JR20130109/JR274 Underway Meteorology Data Quality Report
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 ships heading corresponded to a spike in corrected wind speed or direction. Overall the data for the cruise duration appeared of good quality.
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.
Irradiance Channels
Irradiance channels IRRDSV01, IRRDSV02, 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.
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 |
UK Ocean Acidification (UKOA) RRS James Clark Ross Cruise JR20130109/JR274 Underway Meteorology Instrumentation
The instruments used to collect the meteorology datasets are displayed in the table below.
| Manufacturer | Model | Sensor | Serial number | Last calibration date |
| Kipp and Zonen | SPLite 2 | Total Incident Radiation | - | 26/01/2011 |
| Kipp and Zonen | Proto Quantum Spectra 1 | Photosynthetically Active Radiation | - | 05/01/2011 |
| Rotronic | MP402H-050300 | Air temperature and relative humidity | - | 16/03/2011 |
| Vaisala | PTB210 Class B | Digital barometer | - | 10/04/2000 |
| - | - | Anemometer | - | - |
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.
UK Ocean Acidification (UKOA) RRS James Clark Ross Cruise JR20130109/JR274 Underway Meteorology Data Processing 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) and the header information was stored in .TPL files. The instruments logged the meterological data to the oceanlogger and anemometer files.
The SCS data files were submitted to BODC for post-cruise processing and data banking.
BODC Data Processing
Reformatting
The ACO underway data files were merged into a single binary merge file using time as the primary linking key. The time span of the file was from 03/01/2013 22:53:00 to 16/02/2013 14:34:00, with a sampling interval of 60 seconds. Meteorological parameters were matched to BODC parameter codes and transferred to internal BODC format. 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.
A parameter mapping table is shown below:
| 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. Channel not transferred. |
| 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 | Channel not transferred. |
| oceanlogger.ACO, humidity1 | % | Relative humidity (second sensor) of the atmosphere | CRELZZ01 | % | - |
| oceanlogger.ACO, humidity2 | % | Relative humidity (second sensor) of the atmosphere | CRELZZ02 | % | Channel not transferred. |
| 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. Channel not transferred. |
| 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. Channel not transferred. |
| - | µmol m-2 s-1 | Downwelling vector irradiance as photons (PAR wavelengths) in the atmosphere by cosine-collector radiometer and taking the average value from two or more sensors | IRRDSVMS | µE m-2 s-1 | Units are equivalent. Derived channel, average of PARERXSD and IRRDSV01. |
| oceanlogger.ACO tir1 | W m-2 | Downwelling vector irradiance as energy (solar (300-3000nm) wavelengths) in the atmosphere by pyranometer | CSLRR101 | W m-2 | Channel not transferred. |
| oceanlogger.ACO tir2 | W m-2 | Downwelling vector irradiance as energy (solar (300-3000nm) wavelengths) in the atmosphere by pyranometer (second sensor) | CSLRR102 | W m-2 | Channel not transferred. |
| - | W m-2 | Downwelling vector irradiance as energy (solar (300-3000nm) wavelengths) in the atmosphere by pyranometer and taking the average value from two or more sensors | CSLRR1MS | W m-2 | Derived channel, average of CSLRR101 and CSLRR102 |
| 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 | Degrees | Channel derived using BODC Matlab routine 'wincor' |
| - | - | Wind from direction in the atmosphere by in-situ anemometer | EWDASS01 | Degrees true | Channel derived using BODC Matlab routine 'wincor' |
Screening
Each data channel was inspected on a graphics workstation and any spikes or periods of dubious data were flagged. The power of the workstation software was used to carry out comparative screening checks between channels by overlaying data channels. A map of the cruise track was simultaneously displayed in order to take account of the oceanographic context.
Data processing and correction
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).
Calibration
Irradiance channels (PAR and TIR)
Calibrations were applied to the irradiance channels to take the average of the two side by side sensors for both TIR and PAR. The calibrations applied for TIR and PAR respectively are shown below.
| Channel | Calibration equation |
|---|---|
| Average TIR Irradiance | CSLRR1MS = CSLRR101 + CSLRR102 / 2 |
| Average PAR Irradiance | IRRDSVMS = IRRDSV01 + PARERXSD / 2 |
Project Information
UKOARP Theme B: Ocean acidification impacts on sea surface biology, biogeochemistry and climate
The overall aim of this theme is to obtain a quantitative understanding of the impact of ocean acidification (OA) on the surface ocean biology and ecosystem and on the role of the surface ocean within the overall Earth System.
The aims of the theme are:
- To ascertain the impact of OA on planktonic organisms (in terms of physiological impacts, morphology, population abundances and community composition).
- To quantify the impacts of OA on biogeochemical processes affecting the ocean carbon cycle (both directly and indirectly, such as via availability of bio-limiting nutrients).
- To quantify the impacts of OA on the air-sea flux of climate active gases (DMS and N2O in particular).
The main consortium activities will consist of in-situ measurements on three dedicated cruises, as well as on-deck bioassay experiments probing the response of the in-situ community to elevated CO2. Most of the planned work will be carried out on the three cruises to locations with strong gradients in seawater carbon chemistry and pH; the Arctic Ocean, around the British Isles and the Southern Ocean.
Weblink: http://www.oceanacidification.org.uk/research_programme/surface_ocean.aspx
Data Activity or Cruise Information
Cruise
| Cruise Name | JR20130109 (JR274) |
| Departure Date | 2013-01-09 |
| Arrival Date | 2013-02-12 |
| Principal Scientist(s) | Geraint Tarling (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 |
