Metadata Report for BODC Series Reference Number 1879741
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
Data quality report for Marine Scotland current meter moorings
During BODC quality control, data were screened using in house visualisation software. The data were screened and any obvious outliers and spikes were looked at in closer detail and flagged if necessary. There were no data quality comments provided by the originator.
Variability was noted in both the TEMPPR01 and PSALPR01 channels but these periods did not look like anomalous data and so did not require flagging. A 'M' flag was added to a cycle in the LCDAEL01 channel in series 1879741 where the point was a clear outlier when compared to the surrounding data.
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
Aanderaa Recording Current Meter Model 9/11
The RCM 9/11 is a family of single-point Doppler recording current meters with different casing options to allow working at depths of up to 300 (RCM 9 LW), 2000 (RCM 9 IW) or 6000 (RCM 11) metres. The recording unit is 51.3 cm or 59.5 cm high (RCM 9 and RCM 11, respectively) with a diameter of 12.8 cm.
The RCM is most commonly deployed in an in-line mooring configuration. As it operates under a tilt up to 35° from vertical, it has a variety of in-line mooring applications by use of surface buoy or sub surface buoy. The instrument is installed in a mooring frame that allows easy installation and removal of the instrument without disassembly of the mooring line. The instrument can also be used for direct reading of the various parameters. This is conveniently done due to its compact design, low drag force and easy handling. Data can be stored internally and read after retrieval or be read in real time on deck by use of the profiling cable.
Meter comprises:
- A Vane Plate (3681) to stabilise the meter during profiling (stops spin).
- Stainless Steel Mooring Frame made to facilitate easy installation and removal of the instrument by use of two knobs.
- Doppler Current Sensor (Current speed sensor) - Range of speed recorded 0-300 cm s-1 with a 0.3 cm s-1 resolution.
- Hall Effect Compass - Direction recorded with 0.35 ° resolution, 5 ° for 0.15 ° tilt and 7.5 ° for 15-35 ° tilt.
- Thermistor (Temperature sensor) - With selectable wide, low, high and Arctic ranges. Standard range -2.70 to 21.77 °C, accuracy 0.05 °C, resolution 0.1% of selected range, 63% response time (12 sec).
- Inductive Cell Conductivity Sensor (optional) - Range 0 to 75 mS cm-1, standard resolution 0.002 mS cm-1.
- Pressure Sensor (optional) - Silicon piezoresistive bridge, standard range 0 to 3500 kPa, resolution 0.1% of range.
- Turbidity Sensor (optional) - Optical back-scatter sensor, resolution 0.1% of full scale, (RCM 11 depth capacity 2000 m).
- Oxygen Sensor (optional) - Oxygen optode, range 0 to 500 µM, resolution < 1µM, response time 60 sec, depth capacity 6000 m.
- Data storage units DSU 2990 and 2990E are standard data storage devices for Aanderaa data collecting instruments.
A built-in quartz clock allows the time of the first measurement to be recorded in the DSU. The measuring system is made up of a self-balancing bridge with sequential measurement of 10 channels and solid state memory. Channel 1 is a fixed reference reading for control purposes and data identification. Channels 2 and 3 represent measurement of current speed and direction. The direction is found by the use of measurements along two orthogonal axis and linking them to true north by use of an internal compass reading. The instrument can operate continuously or in eight intervals from 1 to 120 minutes. At 60-minute recording interval the operating time is more than two years. The current speed and direction are averaged over the measuring interval. Channels 4, 5 and 6 represent temperature, conductivity and pressure respectively.
Further information can be found in the manufacturer's instrument specification.
BODC Processing
Data were received in ASCII format files. The series were transferred to BODC's in-house format. The following table shows how the variables within the file were mapped to the appropriate BODC parameter codes.
Original parameter name | Original Units | BODC Parameter Code | BODC Units | Comments |
---|---|---|---|---|
Eastward and Northward current velocity | cm.s-1 | LCDAEL01 and LCSAEL01 (direction and speed) | cm.s-1 and ° | Converted by transfer to current direction (Eulerian) in the water column by in-situ current meter and correction to true North, and current speed (Eulerian) in the water column by in-situ current meter |
Temperature | °C | TEMPPR01 | °C | |
Salinity | PSU | PSALPR01 | Dimensionless | Not recorded at all moorings |
Following transfer to QXF, the data were visually screened using in house BODC software. Any data considered as suspect were flagged accordingly. The originator's quality control flags were retained during transfer.
Originator's Data Processing
Marine Scotland applied the standard manufacturers' calibrations to all current, temperature and salinity data and produced ASCII files for submission to BODC. Data files (.hmo) were named according to the mooring code and the instrument number. Each current meter file contained eastward and northward velocities and temperature. In cases where the temperature data ran for longer than the current data, the temperature records were saved as separate files appended 't'. Salinity data for each instrument were contained in files appended 's'. Header metadata were collated in additional files (.frm). Speed/Direction distributions (.csd) and harmonic analyses files (.lpr) for the current meter data were also generated.
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 2015-07-18 |
End Date (yyyy-mm-dd) | 2016-07-23 |
Organization Undertaking Activity | Marine Scotland Aberdeen Marine Laboratory |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | 890 |
Platform Category | subsurface mooring |
Marine Scotland temperature logger mooring 890
A Aanderaa RCM 9 IW Recording Current Meter and a Sea-Bird SBE 37-SM MicroCAT C-T Sensor was deployed on a mooring at 57° 34.41'N, 12° 20.38'W in a water depth of 1,760 m.
The mooring was deployed on 18 July 2015 by Marine Scotland from FRV Scotia cruise 0915S and recovered on 23 July 2016. Instrumentation details are included in the following table.
Instrument type | Serial Number | Deployment start | Deployment end | Instrument depth (m) | Comments |
---|---|---|---|---|---|
Aanderaa Seaguard RCM IW | 396 | 18 JUL 2015 01:00 | 15 JAN 2016 15:00 | 1,750 m | Depth of instrument is at half tide. The battery ran out before the deployment was complete, data ends in Janauary 2016. |
Sea-Bird SBE 37-SM MicroCAT C-T Sensor | BE10476 | 18 JUL 2015 01:00 | 23 JUL 2016 08:30 | 1,755 m | Depth of instrument is at half tide. |
Related Data Activity activities are detailed in Appendix 1
Cruise
Cruise Name | 0915S |
Departure Date | 2015-07-16 |
Arrival Date | 2015-07-27 |
Principal Scientist(s) | Francis C Neat (Marine Scotland Aberdeen Marine Laboratory) |
Ship | FRV Scotia |
Complete Cruise Metadata Report is available here
Fixed Station Information
Fixed Station Information
Station Name | MASTS Whale-Bone Lander |
Category | Offshore location |
Latitude | 57° 31.10' N |
Longitude | 12° 19.80' W |
Water depth below MSL | 1800.0 m |
MASTS Whale-Bone Lander
As part of the Marine Alliance for Science and Technology for Scotland (MASTS), an experiment into the colonisation of whale bones in the deep sea was conducted. Oceanlab's Deep Ocean Benthic Observer (DOBO) lander was modified to carry the skull of a minke whale and deployed at 1,800 m on in the Rockall trough. In addition to the whale skull, the lander (a pyramid frame) was loaded with current meters, depth sensors, temperature recorders and time-lapse cameras which took images every six hours. The lander was left at the site for a year with the aim to record and monitor the colonisation of the skull by the bone eating worm Osedax.
Site | Whale-Bone Lander |
---|---|
Nominal Latitude (+ve N) | 57.51833 |
Nominal Longitude (+ve E) | -12.33 |
Water depth | 1,800 m |
Period of data collection | 18 JUL 2015 - 23 JUL 2016 |
Related Fixed Station activities are detailed in Appendix 2
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 |
Appendix 1: 890
Related series for this Data Activity are presented in the table below. Further information can be found by following the appropriate links.
If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.
Series Identifier | Data Category | Start date/time | Start position | Cruise |
---|---|---|---|---|
1879685 | Hydrography time series at depth | 2015-07-18 01:00:00 | 57.5735 N, 12.33967 W | FRV Scotia 0915S |
Appendix 2: MASTS Whale-Bone Lander
Related series for this Fixed Station are presented in the table below. Further information can be found by following the appropriate links.
If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.
Series Identifier | Data Category | Start date/time | Start position | Cruise |
---|---|---|---|---|
1879685 | Hydrography time series at depth | 2015-07-18 01:00:00 | 57.5735 N, 12.33967 W | FRV Scotia 0915S |