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Metadata Report for BODC Series Reference Number 2052674


Metadata Summary

Data Description

Data Category Hydrography time series at depth
Instrument Type
NameCategories
Sea-Bird SBE 37 MicroCat SMP-CTP (submersible) CTD sensor  water temperature sensor; salinity sensor; water pressure sensors
Instrument Mounting subsurface mooring
Originating Country United Kingdom
Originator Prof Penny Holliday
Originating Organization National Oceanography Centre, Southampton
Processing Status QC in progress
Online delivery of data Download not available
Project(s) UK-OSNAP
 

Data Identifiers

Originator's Identifier IB4_01/11328
BODC Series Reference 2052674
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2018-07-04 17:00
End Time (yyyy-mm-dd hh:mm) 2020-10-17 10:30
Nominal Cycle Interval 1800.0 seconds
 

Spatial Co-ordinates

Latitude 57.98983 N ( 57° 59.4' N )
Longitude 21.14620 W ( 21° 8.8' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth 2802.0 m
Maximum Sensor or Sampling Depth 2802.0 m
Minimum Sensor or Sampling Height 117.0 m
Maximum Sensor or Sampling Height 117.0 m
Sea Floor Depth 2919.0 m
Sea Floor Depth Source DATAHEAD
Sensor or Sampling Distribution Fixed common depth - All sensors are grouped effectively at the same depth which is effectively fixed for the duration of the series
Sensor or Sampling Depth Datum Approximate - Depth is only approximate
Sea Floor Depth Datum Unspecified -
 

Parameters

BODC CODERankUnitsTitle
AADYAA011DaysDate (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ011DaysTime (time between 00:00 UT and timestamp)
ACYCAA011DimensionlessSequence number
CNDCPR011Siemens per metreElectrical conductivity of the water body by in-situ conductivity cell
PREXMCAT1DecibarsPressure (measured variable) exerted by the water body by semi-fixed moored SBE MicroCAT
TEMPPR011Degrees CelsiusTemperature of the water body

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


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

Sea-Bird SBE 37 SMP {MicroCAT-CTP} (submersible) CTD logger

A high accuracy conductivity and temperature recorder with an integrated pressure sensor designed for deployment on moorings. The SM model uses a serial interface (SM) for real-time data transmissions and has internal batteries. The device is fitted with an integral pump (P).

For more information, please see this document: https://www.bodc.ac.uk/data/documents/nodb/pdf/SeaBird-datasheet-SBE37-SMP-July18.pdf

Processing by BODC of Moored MicroCATs: AR30-04

The SBE 37 MicroCAT data were supplied to BODC as ASCII files representing the data collected from MicroCAT sensors deployed at the EB1, WB1, and WB2 sites as well as the IB3, IB4, and IB5 sites during cruise AR30-04.

During transfer to BODC internal format (QXF) the originator's variables were mapped to unique BODC parameter codes. The following table shows the paramater mapping:

Originator's variable Units BODC Code Units Comments
YY - - - Converted to BODC date and time format
MM - - - Converted to BODC date and time format
DD - - - Converted to BODC date and time format
HH - - - Converted to BODC date and time format
T C TEMPPR01 C -
C mS/cm CNDCPR01 S/m Conversion /10
P dbar PREXMCAT dbar -

Following transfer the data were screened using BODC in-house visualisation software. Suspect data values were assigned the appropriate BODC data quality flag. Missing data values, where present, were changed to the missing data value and assigned a BODC data quality flag.

Processing by originator of Moored MicroCATs: AR30-04

Sampling Strategy

During the RV Neil Armstrong cruise AR30-04, 11 Seabird MicroCATs were deployed at the UK-OSNAP EB1 site, 9 at the WB1 site, and 3 at the WB2 site. Additionally, 12 MicroCATs were deployed at the IB3 site, 12 at the IB4 site, and 7 at the IB5 site. They were set to record temperature, conductivity, and pressure. Some MicroCATs also recorded oxygen. These moorings were recovered during the RRS Discovery cruise DY120.

Mooring site Mooring location (latitude, longitude) Water depth (m) Deployment time (GMT) Recovery time (GMT)
EB1 57.1005, -9.5683 1800 08/07/2018 17:00 12/10/2020 10:30
WB1 57.4693, -12.7057 1600 06/07/2018 17:00 14/10/2020 07:00
WB2 57.4717, -12.3117 1600 09/07/2018 22:30 14/10/2020 07:00
IB3 57.9901, -24.3533 2850 03/07/2018 18:00 19/10/2020 12:30
IB4 57.9898, -21.1462 2919 04/07/2018 17:00 17/10/2020 11:00
IB5 57.801, -19.1707 900 05/07/2018 12:00 16/10/2020 07:00

Data Acquisition and Initial Processing

The MicroCATs were calibrated against the CTD sensors. The MicroCATs were positioned on the CTD rosette and deployed before and after their deployment on the mooring. The calibrations were carried out based on 12 to 16 depths with 5 minute bottle stops. The MicroCATs were set to sample at their maximum rate of 0.1 Hz. For the EB1 mooring SBE 37 SMP-ODO MicroCATs measuring concentrations of dissolved oxygen, longer bottle stops of 20-30 minutes in duration were scheduled during the upcast. For calibration, the instruments were set to sample at 110 second intervals.

The processed data were supplied to BODC for banking. Oxygen data was not included and will be ingested separately by BODC.


Project Information

UK - Overturning in the Subpolar North Atlantic Programme (UK-OSNAP) Programme

UK-OSNAP is part of an international collaboration to establish a transoceanic observing system in the subpolar North Atlantic. The aim is to quantify and understand the Subpolar Gyre's response to local and remote forcing of mass, heat and freshwater fluxes, within the conceptual framework of the Atlantic Meridional Overturning Circulation (AMOC).

UK-OSNAP is developing a new observing system to provide a continuous record of full-depth, trans-basin mass, heat, and freshwater fluxes. Combining these sustained measurements with innovative modelling techniques will enable the project to characterise the circulation and fluxes of the North Atlantic Subpolar Gyre.

UK-OSNAP is funded by the Natural Environment Research Council (NERC). The project is led by the National Oceanography Centre (NOC) with partners in the University of Liverpool, the University of Oxford and the Scottish Association for Marine Science (SAMS). It is a part of international OSNAP that is led by USA and includes 10 further partner groups in Canada, France, Germany, the Netherlands and China. The project involves fieldwork at sea and model studies.

The OSNAP observing system consists of two legs: one extending from southern Labrador to the southwestern tip of Greenland across the mouth of the Labrador Sea (OSNAP West), and the second from the southeastern tip of Greenland to Scotland (OSNAP East). The observing system also includes subsurface floats (OSNAP Floats) in order to trace the pathways of overflow waters in the basin and to assess the connectivity of currents crossing the OSNAP line.

NERC have added an extension to UK-OSNAP, until October 2024. This will result in the UK-OSNAP-Decade: 10 years of observing and understanding the overturning circulation in the subpolar North Atlantic (2014-2024).


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2018-07-04
End Date (yyyy-mm-dd) 2020-10-17
Organization Undertaking ActivityNational Oceanography Centre, Southampton
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierIB4_07_2018
Platform Categorysubsurface mooring

Ellett Array Moored Instruments IB4 2018-2020

This rig was deployed as part of the Iceland Basin Array.

Deployment Cruise RV Neil Armstrong 30-04
Recovery Cruise RRS Discovery DY120

The rig was held down by a 1900 kilogram anchor on the seabed at 2919 metres depth. It was kept erect by 44" syntactic float at 75 metres depth and 2 glass spheres at 45 metres depth.

The instruments deployed on the rig were as follows:

Approximate Depth(m) Instrument Serial Number
47 SBE37 SMP MicroCAT 9373
75 RDI WorkHorse 300kHz ADCP - Up 20962
75 RDI WorkHorse 300kHz ADCP - Down 20958
103 SBE37 SMP MicroCAT 14366
199 SBE37 SMP MicroCAT 11332
348 SBE37 SMP MicroCAT 9371
498 SBE37 SMP MicroCAT 11326
698 SBE37 SMP MicroCAT 8077
901 SBE37 SMP MicroCAT 8079
1199 SBE37 SMP MicroCAT 11331
1469 Nortek Aquadopp 8120
1502 SBE37 SMP MicroCAT 8078
1902 SBE37 SMP MicroCAT 9374
2297 Nortek Aquadopp 11051
2302 SBE37 SMP MicroCAT 11323
2796 Nortek Aquadopp 13142
2802 SBE37 SMP MicroCAT 11328

There were no issues with any of the sensors reported.

Related Data Activity activities are detailed in Appendix 1

Cruise

Cruise Name AR30-04 (F2018-007, OSNAP East 2018)
Departure Date 2018-07-01
Arrival Date 2018-07-29
Principal Scientist(s)William E Johns (Rosenstiel School of Marine and Atmospheric Science)
Ship RV Neil Armstrong

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameExtended Ellett Line Station IB4
CategoryOffshore location
Latitude58° 30.00' N
Longitude16° 0.00' W
Water depth below MSL1210.0 m

Extended Ellett Line: Fixed Station IB4

Station IB4 is one of the fixed CTD stations, which together form The Extended Ellett Line. The line lies between Iceland and the Sound of Mull (Scotland) crossing the Iceland Basin and Rockall Trough via the outcrop of Rockall. As part of this initiative, CTD dips, together with associated discrete sampling of the water column, have typically been carried out annually at this station since September 1996.

From 2018 this mooring contributed to the UK-OSNAP project. It was referred to as the OSNAP Iceland Basin Array.

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: IB4_07_2018

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 IdentifierData CategoryStart date/timeStart positionCruise
2052373Currents -subsurface Eulerian2018-07-04 17:00:0057.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052385Currents -subsurface Eulerian2018-07-04 17:00:0057.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052397Currents -subsurface Eulerian2018-07-04 17:00:0057.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052569Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052570Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052582Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052594Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052601Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052613Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052625Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052637Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052649Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052650Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052662Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)

Appendix 2: Extended Ellett Line Station IB4

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 IdentifierData CategoryStart date/timeStart positionCruise
1007936CTD or STD cast1997-09-12 10:45:0058.5585 N, 16.17267 WRRS Discovery D230
2131505Water sample data1997-09-12 11:23:3058.55852 N, 16.17261 WRRS Discovery D230
1304929Water sample data1997-09-12 11:24:0058.55852 N, 16.17261 WRRS Discovery D230
1020557CTD or STD cast1998-05-24 23:59:0058.5005 N, 16.08733 WRRS Discovery D233
1306198Water sample data1998-05-25 00:38:0058.50042 N, 16.08728 WRRS Discovery D233
1849352Water sample data1998-05-25 00:38:0058.50042 N, 16.08728 WRRS Discovery D233
1070867CTD or STD cast1999-09-14 16:21:0058.55683 N, 16.16683 WRRS Discovery D242
1252212Water sample data1999-09-14 16:39:0058.55683 N, 16.16683 WRRS Discovery D242
670502CTD or STD cast2001-05-08 01:02:0058.51067 N, 16.0005 WRRS Discovery D253
667291CTD or STD cast2004-07-16 00:10:0058.5075 N, 15.9995 WFS Poseidon PO314
776431CTD or STD cast2006-10-20 18:54:1858.50933 N, 16.29667 WRRS Discovery D312
847347CTD or STD cast2007-08-28 01:04:1058.49695 N, 16.00621 WRRS Discovery D321B
954136CTD or STD cast2009-06-15 17:05:1258.50052 N, 16.00057 WRRS Discovery D340A
1052615CTD or STD cast2010-05-18 04:26:5658.49917 N, 15.978 WRRS Discovery D351
1896639Water sample data2010-05-18 05:10:0058.50004 N, 15.97696 WRRS Discovery D351
1195628CTD or STD cast2011-05-29 09:01:4658.49867 N, 15.9995 WRRS Discovery D365
1204013CTD or STD cast2012-08-10 12:43:0058.49978 N, 15.999 WRRS Discovery D379
1220258CTD or STD cast2013-05-17 17:05:5758.5 N, 16.0 WRRS James Cook JC086
2098230Water sample data2013-05-17 17:46:3058.50611 N, 16.2375 WRRS James Cook JC086
2098696Water sample data2013-05-17 17:46:3058.50611 N, 16.2375 WRRS James Cook JC086
2099221Water sample data2013-05-17 17:46:3058.50611 N, 16.2375 WRRS James Cook JC086
2099792Water sample data2013-05-17 17:46:3058.50611 N, 16.2375 WRRS James Cook JC086
2100346Water sample data2013-05-17 17:46:3058.50611 N, 16.2375 WRRS James Cook JC086
2101337Water sample data2013-05-17 17:46:3058.50611 N, 16.2375 WRRS James Cook JC086
1370717CTD or STD cast2014-07-09 03:01:5758.47 N, 16.0 WRRS James Clark Ross JR20140531 (JR302)
1723028CTD or STD cast2015-06-07 22:24:0258.5007 N, 15.9996 WRRS Discovery DY031
1722105Currents -subsurface Eulerian2015-06-07 22:24:3658.50072 N, 15.9996 WRRS Discovery DY031
2150066Water sample data2015-06-07 23:03:3058.50072 N, 15.9996 WRRS Discovery DY031
1878958Water sample data2015-06-07 23:04:0058.50072 N, 15.9996 WRRS Discovery DY031
1764403CTD or STD cast2016-06-14 20:42:1558.4997 N, 16.0029 WRRS Discovery DY052
1765547Currents -subsurface Eulerian2016-06-14 20:42:3358.49968 N, 16.0029 WRRS Discovery DY052
1874724Water sample data2016-06-14 21:17:0058.49968 N, 16.0029 WRRS Discovery DY052
2149250Water sample data2016-06-14 21:17:0858.49968 N, 16.0029 WRRS Discovery DY052
2052373Currents -subsurface Eulerian2018-07-04 17:00:0057.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052385Currents -subsurface Eulerian2018-07-04 17:00:0057.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052397Currents -subsurface Eulerian2018-07-04 17:00:0057.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052569Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052570Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052582Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052594Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052601Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052613Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052625Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052637Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052649Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052650Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052662Hydrography time series at depth2018-07-04 17:00:0157.98983 N, 21.1462 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)