Metadata Report for BODC Series Reference Number 1763983


Metadata Summary

Data Description

Data Category Meteorology -unspecified
Instrument Type
NameCategories
anemometer  anemometers
Vaisala PTB 210 digital barometer  meteorological packages
Rotronic Hygromet MP402H temperature and humidity probe  meteorological packages
Kipp and Zonen SP LITE2 pyranometer  radiometers
Kipp and Zonen PSQ1 PAR Quantum Sensor  radiometers
Instrument Mounting research vessel
Originating Country United Kingdom
Originator Dr Matt Palmer
Originating Organization National Oceanography Centre, Liverpool
Processing Status banked
Project(s) UKOARP_ThemeB
 

Data Identifiers

Originator's Identifier JR20120601_PRODQXF_MET
BODC Series Reference 1763983
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2012-06-01 14:48
End Time (yyyy-mm-dd hh:mm) 2012-07-02 16:45
Nominal Cycle Interval 60.0 seconds
 

Spatial Co-ordinates

Southernmost Latitude 53.54183 N ( 53° 32.5' N )
Northernmost Latitude 79.06017 N ( 79° 3.6' N )
Westernmost Longitude 26.01767 W ( 26° 1.1' W )
Easternmost Longitude 26.07067 E ( 26° 4.2' E )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor Depth -20.0 m
Maximum Sensor Depth -15.3 m
Minimum Sensor Height -
Maximum Sensor Height -
Sea Floor Depth -
Sensor Distribution Scattered at fixed depths - The sensors are scattered with respect to depth but each remains effectively at the same depth for the duration of the series
Sensor Depth Datum Approximate - Depth is only approximate
Sea Floor Depth Datum -
 

Parameters

BODC CODE Rank Units Short Title Title
AADYAA01 1 Days Date(Loch_Day) Date (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ01 1 Days Time(Day_Fract) Time (time between 00:00 UT and timestamp)
ALATGP01 1 Degrees Lat_GPS Latitude north (WGS84) by unspecified GPS system
ALONGP01 1 Degrees Lon_GPS Longitude east (WGS84) by unspecified GPS system
CAPHTU01 1 Millibars Air_press Pressure (measured variable) exerted by the atmosphere by barometer and expressed at measurement altitude
CDTAZZ01 1 Degrees Celsius AirTemp Temperature of the atmosphere by thermometer
CRELZZ01 1 Percent Air_humid Relative humidity of the atmosphere
CSLRR101 1 Watts per square metre Solar_rad Downwelling vector irradiance as energy (solar (300-3000nm) wavelengths) in the atmosphere by pyranometer
CSLRR102 1 Watts per square metre Solar_rad2 Downwelling vector irradiance as energy (solar (300-3000nm) wavelengths) in the atmosphere by pyranometer (second sensor)
EWDASS01 1 Degrees True WindDirFrom Wind from direction in the atmosphere by in-situ anemometer
EWSBSS01 1 Metres per second WindSpd Wind speed in the atmosphere by in-situ anemometer
IRRDSV01 1 MicroEinsteins per square metre per second SurfVPAR Downwelling vector irradiance as photons (PAR wavelengths) in the atmosphere by cosine-collector radiometer
PARERXSD 1 MicroEinsteins per square metre per second SurfVPAR2 Downwelling vector irradiance as photons (PAR wavelengths) in the atmosphere by cosine-collector radiometer (second sensor)
 

Definition of Rank

  • Rank 1 is a one-dimensional parameter
  • Rank 2 is a two-dimensional parameter
  • Rank 0 is a one-dimensional parameter describing the second dimension of a two-dimensional parameter (e.g. bin depths for moored ADCP data)

Problem Reports

No Problem Report Found in the Database

UK Ocean Acidification (UKOA) RRS James Clark Ross Cruise JR20120601/JR271 Underway Meteorology Data Quality Report

The meteorology data have been through BODC quality control screening.

Wind Channels

The wind speed and direction channels showed natural variation and fluctuation but there were no trends that stood out as unrealistic. Some intermittent flagging of data was performed, mostly 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 good.

Air pressure, temperature and humidity

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, CSLRR101 and CSLRR102 were flagged where the data values went below zero during the night. There were no negative values for the PARERXSD channel. No other flags were applied as it was unclear whether the variation was due to changing cloud cover or other causes. TIR channel CSLRR101 appeared to be returning values slightly lower than channel CSLRR102 but 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 JR20120601/JR271 Underway Meteorology Instrumentation

The meteorological instruments used to collect this dataset are displayed in the table below.

Manufacturer Model Parameter measured
Kipp and Zonen SPLite 2 Total Incident Radiation
Kipp and Zonen Proto Quantum Spectra 1 Photosynthetically Active Radiation
Rotronic MP402H-050300 Air temperature and relative humidity
Vaisala PTB210 Class B Digital barometer depth
- Anemometer Wind speed and direction

Vaisala PTB210 Digital Barometer

The basic specifications for this pressure sensor are as follows:

Further details can be found in the manufacturer's specification sheet .

UK Ocean Acidification (UKOA) RRS James Clark Ross Cruise JR20120601/JR271 Underway Meteorology Data 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, while 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). The header information was stored in .TPL files. The instruments logged the meterological data to the oceanlogger and anemometer files.

The table below shows details of the original files that were delivered to BODC.

Filename Content Description Start Date Start Time End Date End Time
oceanlogger.ACO Air temperature, humidity, PAR, TIR and surface hydrography parameters 01/06/2012 14:40:32 05/07/2012 13:00:48
Anemometer.ACO Wind direction, wind speed 01/06/2012 14:40:30 05/07/2012 13:00:49

BODC Data Processing

Reformatting

The underway data were reformatted from the originator's ASCII format to BODC's in-house standard. All parameters were merged into a single file, with a common time channel. Data supplied at higher frequency than the BODC file were bin-averaged to the appropriate time-interval. The channel has an interval of 60 seconds.

The originator's variables were mapped to the appropriate BODC parameter codes as follows:

oceanlogger.ACO

Originator's parameter Originator's Units Description BODC parameter BODC Units Comments
baro1 hPa Pressure (measured variable) exerted by the atmosphere by barometer and expressed at measurement altitude CAPHTU01 mbar Units are equivalent
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.
airtemp1 °C Temperature (second sensor) of the atmosphere by dry bulb thermometer CDTAZZ01 °C
airtemp2 °C Temperature (second sensor) of the atmosphere by dry bulb thermometer CDTAZZ02 °C Channel not transferred
humidity1 % Relative humidity (second sensor) of the atmosphere CRELZZ01 %
humidity2 % Relative humidity (second sensor) of the atmosphere CRELZZ02 % Channel not transferred
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
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
tir1 W m -2 Downwelling vector irradiance as energy (solar (300-3000 nm) wavelengths) in the atmosphere by pyranometer CSLRR101 W m -2
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

Originator's parameter Originator's Units Description BODC parameter BODC Units Conversion Factor Comments
wind_dir Degrees Wind direction (relative to moving platform) in the atmosphere by in-situ anemometer ERWDSS01 Degrees channel not transferred
wind_speed knots Wind speed (relative to moving platform) in the atmosphere by in-situ anemometer ERWSSS01 m s -1 * 0.514444 channel not transferred
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'

Data Processing

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).

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.

Calibrations

No field or manufacturer's calibrations were applied by BODC.


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:

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 JR20120601 (JR271)
Departure Date 2012-06-01
Arrival Date 2012-07-02
Principal Scientist(s)Ray Leakey (Scottish Association for Marine Science)
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