Metadata Report for BODC Series Reference Number 1728807
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
JC088 short-term (in-line) moored ADCP (sites LA, LB, SB, SC1 and SC2): Data Quality Report
The ADCP data have been through quality control screening and some flagging of data have been made. Due to the inherently noisy nature of ADCP data, only obvious spikes were looked at in closer detail and flagged if necessary.
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
RD Instruments 300kHz Workhorse Sentinel Acoustic Doppler Current Profiler
Specifications
Water velocity measurements relative to the ADCP | |
---|---|
Maximum velocity | 10 m.s-1 |
Standard deviation | 130, 45, 25, 12, 5 mm.s-1 for depth cell sizes of 1, 2, 4, 8, 16 m, respectively |
Minimum time between pings | 0.07 s |
Maximum profiling range* | 110, 120, 130, 150, 165 m for depth cell sizes of 1, 2, 4, 8, 16 m, respectively |
Minimum range to start of first depth cell | 3 m |
Number of depth cells | 1 - 128 cells |
Depth cell size | 1 - 16 cm |
Echo Intensity measurements | |
Uncertainty | ± 1.5 dB |
Sampling | Uses same depth cells and time intervals as velocity |
Sensors | |
Water level resolution | 0.25 m |
Water level accuracy | ± 5 m over 0-200 m depth |
Temperature range | -5°C to + 45°C |
Temperature uncertainty | ± 0.4°C |
Tilt range | ± 20° |
Tilt uncertainty | ± 2° |
Compass uncertainty | ± 5° at 60° magnetic dip angle |
Compass maximum tilt | 20° |
Physical and Environmental | |
Maximum depth | 200 m |
Operating temperature | -5°C to 60°C |
Storage Temperature | -5°C to 80°C |
The manufacturer's specification document can be found here
JC088 moored ADCPs (Sites LA short and long term, LB, SB, SC1 and SC2): Originator's data processing
Sampling Strategy
RRS James Cook cruise JC088 was the second of two cruises funded by the NERC 'Fluxes Across the Sloping Topography of the North East Atlantic (FASTNEt)' Consortium. JC088 was a 26 day cruise sailing on 28 June 2013 from King George V Dock, Govan to the Malin Shelf edge where inline/single point and bed frame moorings were deployed before returning to Southampton on 24 July 2013.
Data Processing
The Originator has supplied short term inline/single point ADCP mooring data for short term sites LA, LB, SB, SC1 and SC2 and long term site LA in Matlab structured format from two types of ADCP instruments.
Binary data from the ADCP RDI Workhorse instruments were exported into Matlab files using the WinADCP software (v1.14) and then converted into Matlab data structures.
The Matlab files were topped/tailed to only include data when the instrument was settled at its nominal depth.
No quality control have been applied to the files.
Field Calibrations
No field calibrations were undertaken.
References
Inall.M.E. et al. , (2013). RRS James Cook JC088, Glasgow to Southampton. FASTNEt Cruise to the Malin Shelf Edge. 28 th June to 24 th July 2013. A FASTNEt Cruise led by The Scottish Association for Marine Science.
JC088 moored ADCPs (Sites LA short and long term, LB, SB, SC1 and SC2): Processing by BODC
Data from 11 ADCP's arrived at BODC in Matlab structured files. Included were data from five short term inline/single point moorings and one long term mooring. The following table shows how the variables within the files were mapped to appropriate BODC parameter codes:
Originator's Variable | Units | Description | BODC Parameter Code | Units | Comment |
---|---|---|---|---|---|
U - Eastward velocity | m/s | Eastward current velocity (Eulerian) in the water body by moored acoustic doppler current profiler (ADCP) | LCEWAP01 | cm/s | Conversion from originators units to BODC units are applied during transfer. |
V - Northward velocity | m/s | Northward current velocity (Eulerian) in the water body by moored acoustic doppler current profiler (ADCP) | LCNSAP01 | cm/s | Conversion from originators units to BODC units are applied during transfer. |
W - Vertical velocity | m/s | Upward current velocity in the water body by moored acoustic doppler current profiler (ADCP) | LRZAAP01 | cm/s | Conversion from originators units to BODC units are applied during transfer. |
E - Error velocity | m/s | Current velocity error in the water body by moored acoustic doppler current profiler (ADCP) | LERRAP01 | cm/s | Conversion from originators units to BODC units are applied during transfer. |
echo - Echo Amplitude | arbitrary units | Signal return amplitude from the water body by moored acoustic doppler current profiler (ADCP) | ASAMAP01 | dB | - |
Pressure | dB | Pressure (measured variable) exerted by the water body by fixed in-situ pressure sensor and corrected to read zero at sea level | PRESPS01 | dB | Only applies to short term sites LA 75 kHz S/N 17194 and 14788, LB 75 kHz S/N 12893 and SB 300 kHz S/N 2666. |
Bin depth | m | Depth below sea surface (ADCP bin) | DBINAA01 | m | - |
The reformatted data were visualised using BODC's in-house visualisation software. Suspect data were marked by adding an appropriate quality control flag, missing data by both setting the data to an appropriate absent data value and setting the quality control flag.
Project Information
Fluxes Across Sloping Topography of the North East Atlantic (FASTNEt)
Background
The FASTNEt consortium was funded to deliver NERC's Ocean Shelf Edge Exchange Programme. Commencing in October 2011, this four year study aims to couple established observational techniques, such as moorings and CTDs, with the very latest in autonomous sampling initiatives - including use of Autosub Long Range and gliders. With the aid of novel model techniques, these observations will be utilised to construct a new paradigm of Ocean/Shelf exchange.
Shelf edge regions mark the gateway between the world's deep oceans and shallower coastal seas, linking terrestrial, atmospheric and oceanic carbon pools and influencing biogeochemical fluxes. Shelf edge processes can influence near-shore productivity (and fisheries) and ultimately affect global climate.
FASTNEt brings together researchers from multiple UK organisations. Further collaboration has been established with five Project Partners: the UK Met Office, Marine Scotland Science, Agri-Food and Biosciences Institute, Marine Institute Ireland and Scripps Institution of Oceanography.
Scientific Objectives
- To determine the seasonality of physical gradients and exchange across the shelf edge by deploying new observational technologies (gliders, Autosub Long Range) and established techniques (long term moorings, drifters)
- To quantify key exchange mechanisms and to collect new data targeted at testing and improving high resolution models of the shelf edge, by carrying out detailed process studies in contrasting regions of the shelf edge of the NE Atlantic margin
- To develop a new parameterisation of shelf edge exchange processes suitable for regional-scale models, using improved resolution numerical, and new empirical models constrained by the observations
- To test the new parameterisations in a regional model in the context of making an assessment of inter-annual variability of ocean-shelf exchange.
Fieldwork
Three survey sites on the UK shelf edge have been selected for FASTNEt. These are a) the Celtic Sea shelf edge, b) Malin shelf and c) North Scotland shelf. Fieldwork is centred around two research cruises. The first, to the Celtic Sea, on RRS Discovery in June 2012. The second cruise visits the Malin shelf on RRS James Cook, during summer 2013. In addition to these dedicated cruises, opportunist cruise activity to the North Scotland shelf has been agreed with project partner Marine Scotland Science. Autonomous technologies will complement observations made during the cruises and provide knowledge of seasonal and inter-annual variability in exchange processes.
Instrumentation
Types of instruments/measurements:
- Gliders
- Autosub Long Range
- Drifter buoys
- Scanfish
- Microstructure profilers
- Moored CTD/CT loggers and ADCPs
- Shipboard measurements: CTD, underway, nutrients (and other discrete sampling), LADCP, ADCP.
Contacts
Collaborator | Organisation |
---|---|
Prof. Mark Inall (lead) | Scottish Association for Marine Science, U.K |
Dr. Jason Holt | National Oceanography Centre, U.K |
Dr. Peter Miller | Plymouth Marine Laboratory, U.K |
Dr. Mattias Green | Bangor University, U.K |
Prof. Jonathan Sharples | University of Liverpool, U.K |
Dr. Vasyl Vlasenko | University of Plymouth, U.K |
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 2013-07-03 |
End Date (yyyy-mm-dd) | 2013-07-18 |
Organization Undertaking Activity | Scottish Association for Marine Science |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | JC088_SC2 |
Platform Category | subsurface mooring |
FASTNEt short term inline/single point mooring SC2
The short term mooring SC2 was deployed and recovered during cruise RRS James Cook JC088 as part of the Fluxes Across the Sloping Topography of the North East Atlantic (FASTNEt) project.
Instruments deployed on the mooring
Instrument codes
ADCP - RDI ADCP (U, V, W, Temperature and Pressure)
NIOZ_t - Thermistor on NIOZ chain (Temperature)
A/R - Acoustic Release
Nominal depth (m) | Instrument type | Instrument serial number | Comments |
---|---|---|---|
252.5 | subsurface float | - | - |
274.5 | ADCP 300KHz | 6358 | - |
275.5 | NIOZ_t | 251 | - |
276.5 | NIOZ_t | 252 | - |
277.5 | NIOZ_t | 253 | - |
278.5 | NIOZ_t | 254 | - |
279.5 | NIOZ_t | 255 | - |
280.5 | NIOZ_t | 256 | - |
281.5 | NIOZ_t | 257 | - |
282.5 | NIOZ_t | 258 | - |
283.5 | NIOZ_t | 259 | - |
284.5 | NIOZ_t | 260 | - |
285.5 | NIOZ_t | 261 | - |
286.5 | NIOZ_t | 262 | - |
287.5 | NIOZ_t | 263 | - |
288.5 | NIOZ_t | 264 | - |
289.5 | NIOZ_t | 265 | - |
290.5 | NIOZ_t | 266 | - |
291.5 | NIOZ_t | 267 | - |
292.5 | NIOZ_t | 268 | - |
293.5 | NIOZ_t | 269 | - |
294.5 | NIOZ_t | 270 | - |
295.5 | NIOZ_t | 271 | - |
296.5 | NIOZ_t | 272 | - |
297.5 | NIOZ_t | 273 | - |
298.5 | NIOZ_t | 274 | - |
299.5 | NIOZ_t | 275 | - |
300.5 | NIOZ_t | 276 | - |
301.5 | NIOZ_t | 277 | - |
302.5 | NIOZ_t | 278 | - |
303.5 | NIOZ_t | 279 | - |
304.5 | NIOZ_t | 281 | - |
305.5 | NIOZ_t | 282 | - |
306.5 | NIOZ_t | 283 | - |
307.5 | NIOZ_t | 284 | - |
308.5 | NIOZ_t | 285 | - |
309.5 | NIOZ_t | 286 | - |
310.5 | NIOZ_t | 287 | - |
311.5 | NIOZ_t | 288 | - |
312.5 | NIOZ_t | 289 | - |
313.5 | NIOZ_t | 290 | - |
314.5 | NIOZ_t | 291 | - |
315.5 | NIOZ_t | 292 | - |
316.5 | NIOZ_t | 293 | - |
317.5 | NIOZ_t | 294 | - |
318.5 | NIOZ_t | 295 | - |
319.5 | NIOZ_t | 297 | - |
320.5 | NIOZ_t | 298 | - |
321.5 | NIOZ_t | 299 | - |
322.5 | NIOZ_t | 300 | lost |
323.5 | NIOZ_t | 301 | dragged up the line by 0.5m |
324.5 | NIOZ_t | 302 | - |
325.5 | NIOZ_t | 303 | - |
326.5 | NIOZ_t | 304 | may be sensor 48 dragged up instead |
327.5 | NIOZ_t | 305 | - |
328.5 | NIOZ_t | 306 | lost |
329.5 | NIOZ_t | 307 | lost |
330.5 | NIOZ_t | 308 | lost |
331.5 | NIOZ_t | 309 | lost |
332.5 | NIOZ_t | 310 | lost |
333.5 | NIOZ_t | 311 | lost |
334.5 | NIOZ_t | 312 | lost |
335.5 | NIOZ_t | 313 | lost |
336.5 | NIOZ_t | 314 | lost |
337.5 | NIOZ_t | 316 | lost |
338.5 | NIOZ_t | 317 | lost |
339.5 | NIOZ_t | 318 | lost |
340.5 | NIOZ_t | 319 | lost |
341.5 | NIOZ_t | 320 | lost |
342.5 | NIOZ_t | 321 | lost |
343.5 | NIOZ_t | 322 | lost |
344.5 | NIOZ_t | 323 | dragged to position 28 in a clump |
345.5 | NIOZ_t | 324 | dragged to position 28 in a clump |
346.5 | NIOZ_t | 325 | dragged to position 28 in a clump |
347.5 | NIOZ_t | 326 | dragged to position 28 in a clump |
348.5 | NIOZ_t | 327 | dragged to position 28 in a clump |
349.5 | NIOZ_t | 328 | lost |
350.5 | NIOZ_t | 329 | - |
351.5 | NIOZ_t | 331 | - |
352.5 | NIOZ_t | 332 | - |
353.5 | NIOZ_t | 333 | - |
354.5 | NIOZ_t | 334 | - |
355.5 | NIOZ_t | 335 | - |
356.5 | NIOZ_t | 336 | - |
357.5 | NIOZ_t | 337 | - |
358.5 | NIOZ_t | 338 | lost |
359.5 | NIOZ_t | 340 | - |
360.5 | NIOZ_t | 341 | lost |
361.5 | NIOZ_t | 342 | - |
362.5 | NIOZ_t | 343 | lost |
363.5 | NIOZ_t | 344 | put back in position but displaced on recovery |
364.5 | NIOZ_t | 345 | - |
365.5 | NIOZ_t | 346 | - |
366.5 | NIOZ_t | 347 | - |
367.5 | NIOZ_t | 348 | - |
368.5 | NIOZ_t | 349 | - |
369.5 | NIOZ_t | 350 | lost |
370.5 | NIOZ_t | 351 | lost |
371.5 | NIOZ_t | 352 | lost |
372.5 | NIOZ_t | 353 | lost |
373.5 | NIOZ_t | 354 | - |
374.5 | NIOZ_t | 355 | lost |
375.5 | NIOZ_t | 356 | - |
376.5 | NIOZ_t | 357 | - |
377.5 | A/R | 073 | - |
389.5 | anchor | - | - |
The depths are based on the original positions of the thermistors on the line, as it is believed the entanglement of the line and subsequent shift of some sensors occurred at recovery.
Related Data Activity activities are detailed in Appendix 1
Cruise
Cruise Name | JC088 |
Departure Date | 2013-06-28 |
Arrival Date | 2013-07-24 |
Principal Scientist(s) | Mark E Inall (Scottish Association for Marine Science) |
Ship | RRS James Cook |
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 |
Appendix 1: JC088_SC2
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 |
---|---|---|---|---|
1728788 | Currents -subsurface Eulerian | 2013-07-03 11:37:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728819 | Currents -subsurface Eulerian | 2013-07-05 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728820 | Currents -subsurface Eulerian | 2013-07-06 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728832 | Currents -subsurface Eulerian | 2013-07-07 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728844 | Currents -subsurface Eulerian | 2013-07-08 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728856 | Currents -subsurface Eulerian | 2013-07-09 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728868 | Currents -subsurface Eulerian | 2013-07-10 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728881 | Currents -subsurface Eulerian | 2013-07-11 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728893 | Currents -subsurface Eulerian | 2013-07-12 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728900 | Currents -subsurface Eulerian | 2013-07-13 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728912 | Currents -subsurface Eulerian | 2013-07-14 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728924 | Currents -subsurface Eulerian | 2013-07-15 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728936 | Currents -subsurface Eulerian | 2013-07-16 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728948 | Currents -subsurface Eulerian | 2013-07-17 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |
1728961 | Currents -subsurface Eulerian | 2013-07-18 00:00:08 | 55.90383 N, 9.28223 W | RRS James Cook JC088 |