Metadata Report for BODC Series Reference Number 1368878
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
Data Description |
|||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||
Data Identifiers |
|||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||
Time Co-ordinates(UT) |
|||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||
Spatial Co-ordinates | |||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||
Parameters |
|||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||
|
Problem Reports
No Problem Report Found in the Database
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
Aanderaa Recording Current Meter Model 7/8
Manufacturer's specifications: recording unit height 49.5cm (RCM8 52.0cm), diameter 12.8cm, vane size 48.5x50.0cm. Meter is designed for depths down to 2000m (RCM8 6000m). It incorporates a spindle which is shackled to the mooring line. The meter is attached to the spindle through a gimbal mounting which permits a maximum 27° deviation of the spindle from the vertical, the meter still remaining horizontal.
Meter comprises :
-
Paddle wheel rotor magnetically coupled to an electronic counter
-
Vane, which aligns instrument with current flow, has a balance weight ensuring static balance and tail fins to ensure dynamic balance in flows up to 250cm/s.
-
Magnetic compass (needle is clamped to potentiometer ring) - direction recorded with 0.35° resolution, 5° accuracy for speeds 5 to 100cm/s, 7.5° accuracy for remaining speeds within 2.5 to 200cm/s range.
-
Quartz clock, accuracy better than 2 sec/day within temperature range 0 to 20°C.
-
Thermistor (temperature sensor), standard range -2.46 to 21.48°C (max on high range 36.04°C), accuracy 0.05°C, resolution 0.1 per cent of range, 63 per cent response time 12sec.
-
Inductive cell conductivity sensor (optional), range 0 to 70mmho/cm standard resolution 0.1 per cent of range.
-
Silicon piezoresistive bridge, standard range 0 to 3000 psi (RCM8 to 9000 psi), resolution 0.1% of range.
-
Self balancing potentiometer which converts the output from each sensor into a 10 bit binary number for storage on magnetic tape.
-
Associated electronics.
A built-in clock triggers the instrument at preset intervals and up to six channels are sampled in sequence. Channel 1 is a fixed reference reading for control purposes and data identification. Channels 2, 3 and 4 represent measurement of temperature, conductivity and pressure. Channels 5 and 6 represent the VECTOR AVERAGED current speed and direction since the previous triggering of the instrument. The number of rotor revolutions and the direction is sampled every 12 seconds and broken into North and East components. Successive components are added and recorded as speed and direction. For recording intervals longer than 10 minutes, speed and direction are sampled 1/50th of recording interval.
It has become common practice in some laboratories to deploy these meters as temperature and conductivity loggers without current measuring capabilities.
The following link will provide the manufacturer specifications:
Manufacturer specificationsOriginators Data Processing
Sampling Strategy:
Sampling was carried out as part of the BAS LTMS (British Antarctic Survey Long Term Monitoring and Survey). The project involved the deployment of moorings CI1, CI2, OP1, OP2, OP3, OP4, OP5 and OP6 in the Southern Ocean, situated north of Coronation Island and the Orkney Passage in the Weddell and Scotia Sea.
Moorings CI1 and CI2 were deployed from 2005 to 2007 and moorings OP1, OP2, OP3, OP4, OP5 and OP6 have been continuously maintained since 2007.
RCM8 data are being collected on a 60 minute interval.
Gaps in the data series may be due to measurements not being obtained, instrument malfunction and/or the instruments not being recovered.
Data Processing:
Little information is known with regards to the exact details of calibrations carried out on the mooring data. Originators data processing, visualisation and calibration were completed using Matlab version R2014b using a script created by the originator. The calibration, which was applied to the raw data, corrected, plot overview figures and thus exported a final Matlab data version which was transferred by BODC.
The originator reported that the current velocity and direction components for the data from 2005 to 2013 have not been corrected for magnetic variation. This is due to the variation in this region being less than one degree, which is less than the accuracy of the current direction measurements of the instrument.
An offset value has been applied to the corrected/calibrated temperature variables, the offset values applied can be found below:
Mooring | Time Period (UT) | Depth (m) | Serial Number | Offset Applied |
---|---|---|---|---|
CI1 | 2005-12-27 - 2007-02-24 | 3378 | 12677 | 0.0400 |
CI2 | 2005-12-26 - 2007-02-24 | 3382 | 12669 | 0.0400 |
OP3 | 2007-02-25 - 2009-02-28 | 1989 | 12669 | 0.0400 |
OP3 | 2007-02-25 - 2009-02-28 | 1833 | 12677 | 0.0400 |
OP3 | 2009-03-02 - 2011-03-25 | 1966 | 12669 | 0.0150 |
OP3 | 2009-03-02 - 2011-03-25 | 1966 | 12677 | 0.0150 |
OP5 | 2011-03-27 - 2013-03-29 | 2986 | 12677 | 0.0150 |
OP5 | 2011-03-27 - 2013-03-29 | 3343 | 12669 | 0.0150 |
Project Information
BAS Long Term Monitoring and Survey
Introduction
The Long Term Monitoring and Survey project (LTMS) has been running since the British Antarctic Survey (BAS) was created. This project is one of the BAS core projects, with several groups of scientists collecting various types of data e.g biological, geological, atmospheric, among others.
Data collection is achievable through a wide scope of instruments and platforms, e.g. the Antarctic research stations, autonomous instrument platforms deployed on or from BAS research ships, BAS aircrafts, satellite remote sensing and others.
Scientific Objectives
This project was implemented in order to measure change and variability in the Earth system. Its long term duration allows for the monitoring of processes that could be missed in shorter term studies and experiments. The data collected is also used to check and improve the reliability of models used to stimulate and predict the behavior of the Earth system.
The main objectives are:
- Topographic survey
- Geosciences survey
- Biological survey and monitoring
- Atmospheric and oceanographic monitoring
Data Availability
The data sets obtained through this project are available to the academic community.
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 2011-03-27 |
End Date (yyyy-mm-dd) | 2013-04-29 |
Organization Undertaking Activity | British Antarctic Survey |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | OP5 |
Platform Category | subsurface mooring |
Orkney Passage mooring 5 (OP5)
The mooring was deployed at the following positions:
Organisation Undertaking Activity | British Antarctic Survey, Cambridge |
---|---|
Country of Organisation | United Kingdom |
Originator's Data Activity Identifier | OP5 |
Platform Category | Subsurface mooring |
Latitude (+ve N) | -60.6129 |
Longitude (+ve E) | -41.9712 |
Water Depth (m) | 3396 |
The mooring was deployed on the Orkney Passage on cruise JR20110319 (JR252, JR254C) on 27 March 2011 and recovery was done on cruise JR20130317 (JR272B, JR273A, JR281, UKD-4) on 29 April 2013.
The table below lists the instruments deployed on this mooring:
Instrument type | Serial Number | Data start (UT) | Data end (UT) | Instrument depth (m) |
---|---|---|---|---|
Aanderaa RCM8 | 12667 | 2011-03-27 18:00:00 | 2013-03-29 11:42:00 | 2986 |
Sea Bird SBE39 | 4409 | 2011-03-27 17:14:59 | 2013-03-29 12:43:00 | 2993 |
Aanderaa RCM8 | 12669 | 2011-03-27 18:00:00 | 2013-03-29 11:58:00 | 3343 |
Sea Bird SBE39 | 4418 | 2011-03-27 17:15:00 | 2013-03-29 12:45:00 | 3377 |
Related Data Activity activities are detailed in Appendix 1
Cruise
Cruise Name | JR20110319 (JR252, JR254C) |
Departure Date | 2011-03-19 |
Arrival Date | 2011-04-06 |
Principal Scientist(s) | Povl Abrahamsen (British Antarctic Survey) |
Ship | RRS James Clark Ross |
Complete Cruise Metadata Report is available here
Fixed Station Information
Fixed Station Information
Station Name | Orkney Passage OP5 |
Category | Offshore location |
Latitude | 60° 36.77' S |
Longitude | 41° 58.27' W |
Water depth below MSL | 3396.0 m |
Orkney Passage OP5 site
Site OP5 is part of the Orkney Passage mooring array which is an activity covered by the Long Term Monitoring and Survey British Antarctic Survey's (BAS) programme. The data collection is the result of an ongoing collaboration between BAS and the Lamont-Doherty Earth Observatory (LDEO).
This site has been occupied since 2011 but throughout the years it has been moved. The recovery/deployment history, including position details, is presented below:
Deployed | Recovered | |||||
---|---|---|---|---|---|---|
Year | Cruise | Year | Cruise | Latitude (+veN) | Longitude (+ve E) | Water Depth (m) |
2011 | JR20110319 (JR252, JR254C) | 2013 | JR20130317 (JR272B, JR273A, JR281, UKD-4) | -60.6129 | -41.9712 | 3396 |
2013 | JR20130317 (JR272B, JR273A, JR281, UKD-4) | 2015 | JR20150309 (JR272D, JR310) | -60.6093 | -41.9782 | 3403 |
2015 | JR20150309 (JR272D, JR310) | 2017 | JR16005 | -60.6071 | -41.9755 | 3423 |
Detailed information for each deployment can be accessed from the OP5 Data Activity document.
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: OP5
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 |
---|---|---|---|---|
1223508 | Hydrography time series at depth | 2011-03-27 17:15:00 | 60.61287 S, 41.97122 W | RRS James Clark Ross JR20110319 (JR252, JR254C) |
1223521 | Hydrography time series at depth | 2011-03-27 17:15:00 | 60.61287 S, 41.97122 W | RRS James Clark Ross JR20110319 (JR252, JR254C) |
1368866 | Currents -subsurface Eulerian | 2011-03-27 18:00:00 | 60.61287 S, 41.97122 W | RRS James Clark Ross JR20110319 (JR252, JR254C) |
Appendix 2: Orkney Passage OP5
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 |
---|---|---|---|---|
1223508 | Hydrography time series at depth | 2011-03-27 17:15:00 | 60.61287 S, 41.97122 W | RRS James Clark Ross JR20110319 (JR252, JR254C) |
1223521 | Hydrography time series at depth | 2011-03-27 17:15:00 | 60.61287 S, 41.97122 W | RRS James Clark Ross JR20110319 (JR252, JR254C) |
1368866 | Currents -subsurface Eulerian | 2011-03-27 18:00:00 | 60.61287 S, 41.97122 W | RRS James Clark Ross JR20110319 (JR252, JR254C) |
1840346 | Hydrography time series at depth | 2013-03-29 22:15:00 | 60.60932 S, 41.97822 W | RRS James Clark Ross JR20130317 (JR252B, JR272B, JR273A, JR281, UKD-4) |
1840358 | Hydrography time series at depth | 2013-03-29 22:15:00 | 60.60932 S, 41.97822 W | RRS James Clark Ross JR20130317 (JR252B, JR272B, JR273A, JR281, UKD-4) |
1840924 | Currents -subsurface Eulerian | 2013-03-29 23:00:00 | 60.60932 S, 41.97822 W | RRS James Clark Ross JR20130317 (JR252B, JR272B, JR273A, JR281, UKD-4) |
1814087 | CTD or STD cast | 2015-03-20 23:27:30 | 60.6171 S, 41.9734 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1805742 | Currents -subsurface Eulerian | 2015-03-20 23:27:41 | 60.6171 S, 41.97342 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1894682 | Currents -subsurface Eulerian | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1894694 | Currents -subsurface Eulerian | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1894701 | Currents -subsurface Eulerian | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1894713 | Currents -subsurface Eulerian | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1894725 | Currents -subsurface Eulerian | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1894737 | Currents -subsurface Eulerian | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1894749 | Currents -subsurface Eulerian | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1894750 | Currents -subsurface Eulerian | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929376 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929407 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929419 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929420 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929432 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929444 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929456 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929468 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1929481 | Hydrography time series at depth | 2015-04-06 19:20:00 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1881180 | Hydrography time series at depth | 2015-04-06 19:20:01 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1881192 | Hydrography time series at depth | 2015-04-06 19:20:01 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1881211 | Hydrography time series at depth | 2015-04-06 19:20:01 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1881223 | Hydrography time series at depth | 2015-04-06 19:20:01 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1881235 | Hydrography time series at depth | 2015-04-06 19:20:01 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1881247 | Hydrography time series at depth | 2015-04-06 19:20:01 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1881259 | Hydrography time series at depth | 2015-04-06 19:20:01 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1881260 | Hydrography time series at depth | 2015-04-06 19:20:01 | 60.60707 S, 41.97552 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1814628 | CTD or STD cast | 2015-04-06 21:20:38 | 60.5978 S, 41.9788 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
1806284 | Currents -subsurface Eulerian | 2015-04-06 21:20:48 | 60.59784 S, 41.97878 W | RRS James Clark Ross JR20150309 (JR272D, JR310) |
2022389 | Currents -subsurface Eulerian | 2017-04-19 18:20:00 | 60.61197 S, 41.97389 W | RRS James Clark Ross JR16005 |
2022390 | Currents -subsurface Eulerian | 2017-04-19 18:20:00 | 60.61197 S, 41.97389 W | RRS James Clark Ross JR16005 |
2022605 | Hydrography time series at depth | 2017-04-19 18:20:00 | 60.61197 S, 41.97389 W | RRS James Clark Ross JR16005 |
2022537 | Hydrography time series at depth | 2017-04-19 18:20:01 | 60.61197 S, 41.97389 W | RRS James Clark Ross JR16005 |