Metadata Report for BODC Series Reference Number 1641347


Metadata Summary

Data Description

Data Category Hydrography time series at depth
Instrument Type
NameCategories
Sea-Bird SBE 16Plus SEACAT C-T Recorder  water temperature sensor; salinity sensor
Instrument Mounting -
Originating Country United Kingdom
Originator Dr Matt Palmer
Originating Organization Proudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool)
Processing Status QC in progress
Project(s) Oceans 2025
Oceans 2025 Theme 10
Oceans 2025 Theme 10 SO11
 

Data Identifiers

Originator's Identifier MX04737.01088
BODC Series Reference 1641347
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2010-01-26 11:40
End Time (yyyy-mm-dd hh:mm) 2010-03-17 15:40
Nominal Cycle Interval 600.0 seconds
 

Spatial Co-ordinates

Latitude 53.53783 N ( 53° 32.3' N )
Longitude 3.64033 W ( 3° 38.4' W )
Positional Uncertainty Unspecified
Minimum Sensor Depth 35.7 m
Maximum Sensor Depth 35.7 m
Minimum Sensor Height 0.5 m
Maximum Sensor Height 0.5 m
Sea Floor Depth 36.2 m
Sensor Distribution Fixed common depth - All sensors are grouped effectively at the same depth which is effectively fixed for the duration of the series
Sensor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
Sea Floor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
 

Parameters

No Parameters for BODC Reference Number = 1641347

 

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

Originator's quality control comments for PD02_10 COBS moorings

Data supplied to BODC were accompanied by data quality notes from the Originator that detailed observations made when the data were processed and subsequent processing decisions. A summary of these notes have been provided in the tables below.

Site A

Rig#1085

Instrument Serial number Instrument depth Data quality comments
Sea-Bird MicroCAT 02081 5 m Temperature data was offset against CTD data by 0.04°C at mooring deployment and 0.1°C at mooring recovery, however there was a distance of 800 m between the CTD and mooring at mooring recovery. Conductivity offsets of 0.01 S m-1 at mooring deployment and 0.005 S m-1 at mooring recovery were observed when these data were compared against CTD data. No adjustments have been made to these data.
Star-Oddi minilogger 02836 7.5 m Comparisons performed against the other instruments present at this site found an offset of -0.06°C in the temperature data recorded by this instrument. An offset correction of +0.06°C has been applied to these data.
Sea-Bird MicroCAT 05790 10 m Comparisons performed against CTD data found offsets of 0.04°C in temperature and 0.004 S m-1 at deployment and 0.03°C in temperature and 0.01 S m-1 in conductivity at recovery. No adjustments have been made to these data.
Star-Oddi minilogger 02838 15 m Comparisons performed against the other instruments present at this site found an offset of -0.06°C in the temperature data recorded by this instrument. An offset correction of +0.06°C has been applied to these data.

Rig#1086


Instrument Serial number Instrument depth Data quality comments
Sea-Bird 16+ SEACAT fitted with Seapoint Turbidity Meter #10537 05309 Located on seabed Comparisons performed against CTD data found offsets of 0.0125°C in temperature and 0.01 S m-1 at deployment, however a good match was found between the CTD data and data recorded by this instrument at mooring recovery.
Teledyne RDI 600 kHz ADCP 5807 Located on seabed To correct for the magnetic declination (difference between magnetic north and true north) latitude values were changed by -3.2545°. All latitude values were modified by +2.1331°C to correct for the compass error.

Site B

Rig#1087

This rig was recovered off position at 53.5357°N, -3.6004°W which was approximately 2.5 kilometres from the location of site B.

Instrument Serial number Instrument depth Data quality comments
Sea-Bird MicroCAT 05791 5 m None.
Star-Oddi minilogger 02841 7.5 m A temperature offset of -0.04°C was found when these data were compared with the data recorded by the Sea-Bird MicroCATs also present at this site. An offset correction of +0.04°C has been applied to these data.
Sea-Bird MicroCAT 05793 10 m Comparisons performed against CTD data found an offset of 0.1°C in temperature at mooring recovery.
Star-Oddi minilogger 02849 15 m Spikes at cycles 2009, 2110, 2332, 2396, 2398, 2399 and 2694 have been converted into absent data values by the Data Originator. A temperature offset of -0.04°C was found when these data were compared with the data recorded by the Sea-Bird MicroCATs also present at this site. An offset correction of +0.04°C has been applied to these data.

Rig#1088


Instrument Serial number Instrument depth Data quality comments
Sea-Bird 16+ SEACAT fitted with Seapoint Turbidity Meter #10471 04737 Located on seabed Comparisons performed against CTD data found offsets of 0.01°C in temperature and 0.01 S m-1 in conductivity at mooring deployment, however there was a good match between CTD data and data from this instrument at mooring recovery.
Teledyne RDI 600 kHz ADCP Located on seabed To correct for the magnetic declination (difference between magnetic north and true north) latitude values were changed by -3.;C. All latitude values were modified by -0.74112°C to correct for the compass error.

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

Data Processing: NOCL Sea-Bird SBE 16plus SEACAT with Seapoint Turbidity Sensor

Data Originator's Processing

Data were downloaded by the Proudman Oceanographic Laboratory (POL) (since 01 April 2010, the National Oceanography Centre Liverpool (NOCL)) from the instrument logger, and factory calibrations were applied to the temperature and conductivity channels. The instruments are returned to the manufacturer for recalibration approximately every two years. The data were then reformatted by POL/NOCL to a standard ASCII format.

Before the data were supplied to BODC, basic quality control was performed by the Data Originator. The first stage of quality checks involved comparing the data from each instrument with CTD measurements recorded during the deployment and recovery of the mooring. Following the comparison against CTD data secondary checks were performed by comparing the data from each instrument against the data from other sensors attached to that mooring. The Originator has provided BODC with a document containing a full description of the quality control methodology . Depending on the result of the quality checks for each series, one of the following actions was performed by the Originator:

A full description of the results of these quality checks can be found in the relevant Originator's data processing comments document.

Sea-Bird SBE 16plus SEACAT

The SBE 16 plus is a high accuracy conductivity and temperature recorder (pressure optional). It is designed for moorings and other long-duration, fixed-site deployments. The SBE 16 plus has 6 amplified A/D input channels and conditioned power of 500 ma is avaliable for auxiliary sensors, dissolved oxygen, turbidity, fluorescence, PAR etc.

The SBE 16 plus is available with a choice of RS-232 or RS-485 interface.

Sensor specifications

  Temperature
(°C)
Conductivity (S m -1 ) Optional Pressure - strain Gauge Optional Pressure - Quartz
Measurement Range -5 to +35 0 to 9 0 to full scale range: 20 / 100 / 350 / 1000 / 1600 / 2000 / 3500 / 7000 metres 0 to full scale range: 20 / 60 / 130 / 200 / 270 / 680 / 1400 / 2000 / 4200 / 7000 / 10500 metres
Initial accuracy 0.005 0.0005 0.1% (RS-232)/0.04% (RS-485) of full scale range 0.02% (RS-232)/0.002% (RS-485) of full scale range
Typical Stability 0.0002 0.0003 0.05% (RS-232)/0.1% (RS-485) of full scale range 0.025% of full scale range
Resolution 0.0001 0.00005 typical 0.002% of full scale range Depends on sample integration, 0.0006% of full scale range for 1 s integration
Sensor Calibration +1 to +32 0 to 9; physical calibration over range 2.6 to 6.5 S m -1 plus zero conductivity (air) Ambient pressure to full scale range in 5 steps Ambient pressure to full scale range in 5 steps

General information

Memory 8 MB FLASH memory (RS-232); 64 MB FLASH memory (RS-485)
Data Storage Converted temperature and conductivity: 6 bytes per sample. Time: 4 bytes per sample. Pressure (optional): 5 bytes per sample
Real-Time Clock Watch-crystal type 32,768 Hz; accuracy (±1 minutes/year)
Standard Internal Batteries 9 alkaline D-cells. Provides sufficient capacity for 145,000 samples for a CTD and 5M pump
Housing Titanium pressure case rated at 7000 metres
Weight (without pressure) In water: 8.6 kg/In air: 13.7 kg

Further information can be found in the instrument manual


Project Information

Oceans 2025 - The NERC Marine Centres' Strategic Research Programme 2007-2012

Who funds the programme?

The Natural Environment Research Council (NERC) funds the Oceans 2025 programme, which was originally planned in the context of NERC's 2002-2007 strategy and later realigned to NERC's subsequent strategy (Next Generation Science for Planet Earth; NERC 2007).

Who is involved in the programme?

The Oceans 2025 programme was designed by and is to be implemented through seven leading UK marine centres. The marine centres work together in coordination and are also supported by cooperation and input from government bodies, universities and other partners. The seven marine centres are:

Oceans2025 provides funding to three national marine facilities, which provide services to the wider UK marine community, in addition to the Oceans 2025 community. These facilities are:

The NERC-run Strategic Ocean Funding Initiative (SOFI) provides additional support to the programme by funding additional research projects and studentships that closely complement the Oceans 2025 programme, primarily through universities.

What is the programme about?

Oceans 2025 sets out to address some key challenges that face the UK as a result of a changing marine environment. The research funded through the programme sets out to increase understanding of the size, nature and impacts of these changes, with the aim to:

In order to address these aims there are nine science themes supported by the Oceans 2025 programme:

In the original programme proposal there was a theme on health and human impacts (Theme 7). The elements of this Theme have subsequently been included in Themes 3 and 9.

When is the programme active?

The programme started in April 2007 with funding for 5 years.

Brief summary of the programme fieldwork/data

Programme fieldwork and data collection are to be achieved through:

The data is to be fed into models for validation and future projections. Greater detail can be found in the Theme documents.


Oceans 2025 Theme 10

Oceans 2025 is a strategic marine science programme, bringing marine researchers together to increase people's knowledge of the marine environment so that they are better able to protect it for future generations.

Theme 10: Integration of Sustained Observations in the Marine Environment spans all marine domains from the sea-shore to the global ocean, providing data and knowledge on a wide range of ecosystem properties and processes (from ocean circulation to biodiversity) that are critical to understanding Earth system behaviour and identifying change. They have been developed not merely to provide long-term data sets, but to capture extreme or episodic events, and play a key role in the initialisation and validation of models. Many of these SOs will be integrated into the newly developing UK Marine Monitoring Strategy - evolving from the Defra reports Safeguarding our Seas (2002) and Charting Progress (2005), thus contributing to the underpinning knowledge for national marine stewardship. They will also contribute to the UK GOOS Strategic Plan (IACMST, 2006) and the Global Marine Assessment.

Weblink: http://www.oceans2025.org/


Oceans 2025 Theme 10, Sustained Observation Activity 11: Liverpool Bay and Irish Sea Coastal Observatory

Sustained, systematic observations of the ocean and continental shelf seas at appropriate time and space scales allied to numerical models are key to understanding and prediction. In shelf seas these observations address issues as fundamental as 'what is the capacity of shelf seas to absorb change?' encompassing the impacts of climate change, biological productivity and diversity, sustainable management, pollution and public health, safety at sea and extreme events. Advancing understanding of coastal processes to use and manage these resources better is challenging; important controlling processes occur over a broad range of spatial and temporal scales which cannot be simultaneously studied solely with satellite or ship-based platforms.

Considerable effort has been spent by the Proudman Oceangraphic Laboratory (POL) in the years 2001 - 2006 in setting up an integrated observational and now-cast modelling system in Liverpool Bay (see Figure), with the recent POL review stating the observatory was seen as a leader in its field and a unique 'selling' point of the laboratory. Cost benefit analysis (IACMST, 2004) shows that benefits really start to accrue after 10 years. In 2007 - 2012 exploitation of (i) the time series being acquired, (ii) the model-data synthesis and (iii) the increasingly available quantities of real-time data (e.g. river flows) can be carried out through Sustained Observation Activity (SO) 11, to provide an integrated assessment and short term forecasts of the coastal ocean state.

BODC image

Overall Aims and Purpose of SO 11

Measurement and Modelling Activities

More detailed information on this Work Package is available at pages 32 - 35 of the official Oceans 2025 Theme 10 document: Oceans 2025 Theme 10

Weblink: http://www.oceans2025.org/

References:

IACMST., 2004. The Economics of Sustained Marine Measurements. IACMST Information Document, N0.11, Southampton: IACMST, 96 pp


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2010-01-26
End Date (yyyy-mm-dd) 2010-03-17
Organization Undertaking ActivityProudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool)
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierPOLRIG#1088
Platform Categorysubsurface mooring

Proudman Oceanographic Laboratory Rig#1088

Deployment and Recovery

The rig was deployed at Coastal Observatory Site B on 26 January 2010 during RV Prince Madog cruise PD02/10 and recovered on 17 March 2010 during RV Prince Madog cruise PD05/10.

Rig Position 53.538°, -3.640°
Water Depth 36.2 m
Deployed 26 January 2010 11:40 UTC
Recovered 17 March 2010 15:50 UTC
No. of days 50.2

Rig Description

This rig is a bottom frame comprising of the following instruments 0.5 m above the seabed: RDI Acoustic Doppler Current Profiler (ADCP); Sea-Bird 16plus; an additional Sea-Bird 16plus providing logging and power for an Aanderaa oxygen optode; and a SonTek ADV (Acoustic Doppler Velocimeter).The frame was fitted with a fizz link, a spooler with 50 m of rope for recovery of the ballast weight and two Benthos releases.


Instrument Serial Number Parameters Measured Comments
RDI 600 kHz Waves ADCP 5803 Horizontal current velocity components. Vertical current velocity components. Sea surface height Sound velocity calculated from temperature, depth and salinity of 32. Fitted with a pressure sensor; hourly wave recording enabled.
Sea-Bird 16plus
4737 Temperature
Conductivity
Oxygen concentration
Internal temperature of optode
SeaPoint turbidity sensor (serial number 10538) taped to roll bar; set up to 0-125 FTU range

For more information about the instruments please see the cruise report for PD02/10.

Other Series linked to this Data Activity - 1624135

Cruise

Cruise Name PD02/10
Departure Date 2010-01-26
Arrival Date 2010-01-27
Principal Scientist(s)Matthew R Palmer (Proudman Oceanographic Laboratory)
Ship RV Prince Madog

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameCoastal Observatory Site 20
CategoryOffshore area
Latitude53° 32.13' N
Longitude3° 38.39' W
Water depth below MSL32.5 m

Liverpool Bay Coastal Observatory Site 20

This station is one of 34 stations regularly visited by the Proudman Oceanographic Laboratory (POL) as part of the Liverpool Bay Coastal Observatory. During each site visit CTD profiles are collected and since March 2010 (when this became the secondary mooring site for the Coastal Observatory (also known as Site B)) moorings are deployed. The station lies within a box of mean water depth 32.5 m with the following co-ordinates:

Box Corner Latitude Longitude
North-west corner 53.54052° -3.65075°
South-east corner 53.53041° -3.62923°

The position of this station relative to the other POL Coastal Observatory sites can be seen from the figure below.

BODC image

CTD Sampling History

Year Number of Visits Total Casts per year
2011 5 11
2010 8 22
2009 6 6
2008 7 7
2007 7 7
2006 7 8
2005 7 7
2004 8 8
2003 9 9
2002 2 2

The CTD instrument package for these cruises was a Sea-Bird 911plus, with beam transmissometer, fluorometer, LICOR PAR sensor, LISST-25, and oxygen sensor.

Other Series linked to this Fixed Station for this cruise - 1030380 1030564 1075558 1075687 1076629 1624135 1641323 1641335 1641384 1641396

Other Cruises linked to this Fixed Station (with the number of series) - PD01/08 (1) PD01/11 (10) PD02/07 (1) PD02/09B (1) PD05/10 (11) PD06/07 (1) PD07/08 (1) PD07/11 (10) PD09/07 (1) PD09/08 (1) PD10/10 (9) PD11/11 (2) PD12/09 (1) PD13/07 (1) PD14/08 (1) PD16/07 (1) PD17/10 (6) PD18/09 (1) PD19/08 (1) PD20/07 (1) PD21/10 (11) PD23/07 (1) PD23/08 (1) PD24/09 (1) PD29/10 (5) PD33/09 (1) PD35/06 (1) PD36/10 (12) PD37/08 (1) PD38/09 (1) PD43/11 (1) PD49/10 (11)


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