Metadata Report for BODC Series Reference Number 1903607
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
BIOFLAME Cruise RRS James Clark Ross JR20080221 (JR178, JR179) Underway Meteorology Data Quality Document
TIR
From 14 March 2008 02:36:00 hours until the end of the cruise, CSLRR102 exhibits an offset with respect to CSLRR101. All instances were flagged M as the data for the secondary channel records baseline values of ~ 956.2 W m-2 during the night periods.
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 Windobserver 70 (ultrasonic) anemometer
A solid state, heated ultrasonic anemometer. Designed for use within the aviation industry and for more extreme weather conditions. It measures the times taken for an ultrasonic pulse of sound to travel from the North transducer to the South transducer, and compares it with the time for a pulse to travel from S to N transducer. Likewise times are compared between West and East, and E and W transducer. The wind speed and direction (and the speed of sound) can then be calculated from the differences in the times of flight on each axis. This calculation is independent of factors such as temperature. It uses 150 Watts of electrical heating in the anemometer head to prevent icing. Wind speed accuracy is +/-2% at 12 m/s. Wind direction accuracy is +/-2 degrees at 12 m/s.
For more information, please see this document: https://www.bodc.ac.uk/data/documents/nodb/pdf/Gill_WindObserver70_2017.pdf
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 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 |
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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 |
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.
Kongsberg Seatex Seapath 200 GPS and Gyrocompass
The Seapath 200 is a highly accurate, real-time heading, attitude and position information system that integrates the best signal characteristics of Inertial Measurement Units (IMU) and Global Positioning System (GPS), using a differential GPS method to acquire this data.
The high-rate motion data is obtained from the Seatex MRU5 inertial sensor and two fixed baseline GPS carrier-phase receivers. The raw data is integrated in a Kalman filter in the Seapath Processing Unit. The IMU contains an accurate linear accelerometer and Bosch Coriolis force angular rate gyros (CFG).
This system is equipped to utilise up to six different DGPS reference stations, it checks for consistency within measurements from the different sensors to ensure reliability and rejects noisy data or reports its inaccuracy. The data is available through various output protocols, RS-232, RS-422 and Ethernet.
This instrument is no longer in production; the main characteristics are presented below, and the specification sheet can be accessed here Kongsberg Seatex Seapath 200 .
Specifications
Scale factor error in pitch, roll and heading | 0.2% RMS |
Heave motion periods | 1 to 25 s |
Accuracy | |
Heading | 0.05° RMS (4 m baseline) 0.075° RMS (2.5 m baseline) |
Roll and Pitch | 0.03° EMS (± 5° amplitude) |
Heave | 5 cm or 5%, whichever is highest |
Position | 0.7 RMS or 1.5 m (95% CEP) with DGPS 0.15 m EMS or 0.4 m (95% CEP) with Searef 100 corrections |
Velocity | 0.03 m s-1 RMS or 0.07 m s-1 (95% CEP) with DGPS |
BIOFLAME Cruise RRS James Clark Ross JR20080221 (JR178, JR179) Underway Meteorology Instrumentation Document
The meteorological suite of sensors were located on the ship's meteorological mast, with all instruments located 20m above sea level, except the anemometer, which is at 22.5m above sea level and has an orientation of 0° on the bow.
Manufacturer | Model | Function |
Rotronic | Hygrometer MP402H-050300 | Relative humidity and Air temperature |
Kipp and Zonen | Parlite | PAR |
Kipp and Zonen | SP Lite2 | TIR |
Gill | Windobserver 70 (ultrasonic) anemometer | Wind speed and direction |
Vaisala | PTB210 Class B | Air pressure |
BIOFLAME Cruise RRS James Clark Ross JR20080221 (JR178, JR179) Underway Meteorology Processing Procedures Document
Originator's Data Processing
Data were not processed during the cruise, the procedures implemented at that time consisted of data retrieval from the previous 24h and logging those into sub directories on the ship's intranet system.
All instruments, except the anemometer, which was on a mast 22.5 m above sea level, were located on the ship's meteorological mast, the sensors were placed side by side, 20 m above sea level.
Meteorological data originated from duplicate sensors located on the RRS James Clark Ross meteorological mast. The data was sent in two files and included data from: relative wind speed and direction, air temperature, pressure and relative humidity, PAR and TIR.
The post-cruise processing procedures carried out by the originator include:
- check for duplicate dates and times
- standardising time
- check for gaps in data
- check data against defined thresholds
- flagging
- unit conversion
File delivered to BODC
Filename | Content description | Format | Interval | Start date/time (UTC) | End date/time (UTC) | Comments |
jr179_ocl_exactsec | meteorology and surface hydrography data | txt | 5s | 17/02/2008 20:30:28 | 11/04/2008 13:14:45 | processed by the originator |
jr179_anem_exactsec | processed wind data | txt | 2s | 17/02/2008 20:30:28 | 11/04/2008 13:14:48 | relative wind parameters |
BODC Data Processing
Parameter codes defined in BODC's parameter dictionary were assigned to originator's variables. Unit conversions were not necessary as the originator's units were equivalent to the ones on the BODC dictionary. Data were loaded into BODC's database using established data banking procedures.
jr179_ocl_exactsec
Originator's variable | Originator's units | BODC code | BODC units | Unit conversion | Comments |
AirTemp1 | degrees C | CDTAZZ01 | degrees C | Primary sensor | |
Hum1 | % | CRELZZ01 | % | Primary sensor | |
Pressure1 | hPa | CAPHTU01 | mbar | 1 hPa = 1 mbar | Primary sensor |
Pressure2 | hPa | CAPHTU02 | mbar | 1 hPa = 1 mbar | Secondary sensor |
TIR1 | W m-2 | CSLRR101 | W m-2 | Primary sensor | |
TIR2 | W m-2 | CSLRR102 | W m-2 | Secondary sensor | |
PAR1 | µmol m-2 s-1 | IRRDSV01 | µE m-2 s-1 | equivalent units | Primary sensor |
PAR2 | µmol m-2 s-1 | PARERXSD | µE m-2 s-1 | equivalent units | Secondary sensor |
jr179_anem_exactsec
Originator's variable | Originator's units | BODC Code | BODC Units | Unit conversion | Comments |
wind_heading | degrees | ERWDSS01 | degrees | processed by the originator | |
wind_speed | m s-1 | ERWSSS01 | m s-1 | processed by the originator |
All data expressed at measurement altitude.
All the reformatted data were 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.
Absolute wind speed and direction
EWSBSS01 and EWDASS01 were derived using established procedures, from ERWSSS01, ERWDSS01, APNSGP01, APEWGP01, HEADCM01 and the anemometer orientation, which is 0°. Both channels were screened using HEADCM01 as a guide and M flags were applied to all cycles that were also flagged in HEADCM01. Additional M flags were applied to EWDASS01 to sudden changes in wind direction that were considered not to be realistic.
PAR and TIR
The light channels were screened and N flags applied to absent values obtained throughout the cruise. From 14 March 2008 02:36:00 hours until the end of the cruise, CSLRR102 exhibits an offset with respect to CSLRR101. All instances were flagged M as the data for the secondary channel records baseline values of ~ 956.2 W m-2 during the night periods.
Air Pressure
N flags were applied to absent data identified during the cruise period.
Air Temperature and Relative Humidity
During screening it was clear that the secondary air temperature and relative humidity channels weren't logging data. These channels were not included in the final file. N flags were applied to missing data in both CDTAZZ01 and CRELZZ01. CRELZZ01 exhibits some periods of fairly constant values (~ 99.1%), however these data were not flagged as they weren't considered anomalous.
Project Information
BIOFLAME- Biodiversity, Function, Limits and Adaptation from Molecules to Ecosystems
Introduction
This project is part of the BAS GSAC five year research programme. It was funded by NERC and covered a period from 2005 to 2009.
BIOFLAME will study the DNA "fingerprints " of biological evolution to trace the way species adapt to environmental extremes. The methods include high-volume, high-throughput molecular biological approaches, especially DNA sequencing, DNA libraries and micro-array technology on representative samples from the terrestrial and marine ecosystems on and around Antarctica.
BIOFLAME has two components: BIOPEARL (Biodiversity dynamics: Phylogeography, Evolution and Radiation of life) and BIOREACH (Biological Responses to Extreme Antarctic Conditions and Hyper-Extremes) and links with projects and programmes like ACES, CACHE, DISCOVERY2010 and GEACEP.
Scientific Objectives
The main objectives are:
- Understand how the genomes of different species influence their responses to environmental variation and change at the level of individuals, populations, communities and ecosystems
- Find out how the climate change influences biodiversity and affects important ways the ecosystem functions within the Antarctic and globally
- Determine the role of Antarctica and extreme environments in evolutionary change and the development of global biodiversity
Data Availability
Data sets collected during this project are available to the academic community.
Acronyms used in this text:
BAS- British Antarctic Survey
GSAC- Global Science in an Antarctic Context
NERC- Natural Environment Research Council
ACES- Antarctic Climate and the Earth System
CACHE- Climate and Chemistry: forcings, feedbacks and phasings in the Earth System
DISCOVERY2010- Integrating Southern Ocean Ecosystems into the Earth System
GEACEP- Greenhouse to ice-house: Evolution of the Antarctic Cryosphere and Paleoenvironment
Data Activity or Cruise Information
Cruise
Cruise Name | JR20080221 (JR179) |
Departure Date | 2008-02-21 |
Arrival Date | 2008-04-11 |
Principal Scientist(s) | Peter Enderlein (British Antarctic Survey), Robert D Larter (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 |
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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 |
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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 |