Metadata Report for BODC Series Reference Number 1075718


Metadata Summary

Data Description

Data Category Fluorescence or pigments
Instrument Type
NameCategories
Chelsea Instruments MINITracka II fluorometer  fluorometers
Instrument Mounting moored surface buoy
Originating Country United Kingdom
Originator Dr Naomi Greenwood
Originating Organization Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory
Processing Status banked
Project(s) Oceans 2025
Oceans 2025 Theme 10
Oceans 2025 Theme 10 SO11
 

Data Identifiers

Originator's Identifier LB2_039_FL_175064
BODC Series Reference 1075718
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2010-06-10 18:30
End Time (yyyy-mm-dd hh:mm) 2010-07-08 07:30
Nominal Cycle Interval 1800.0 seconds
 

Spatial Co-ordinates

Latitude 53.54050 N ( 53° 32.4' N )
Longitude 3.63860 W ( 3° 38.3' W )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor Depth 1.0 m
Maximum Sensor Depth 1.0 m
Minimum Sensor Height 34.0 m
Maximum Sensor Height 34.0 m
Sea Floor Depth 35.0 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 Approximate - Depth is only approximate
 

Parameters

BODC CODE Rank Units Short Title Title
AADYAA01 1 Days Date(Loch_Day) Date (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ01 1 Days Time(Day_Fract) Time (time between 00:00 UT and timestamp)
ACYCAA01 1 Dimensionless Record_No Sequence number
FVLTTDZX 1 Dimensionless Fl_output Instrument output (arbitrary scale) by autoranging chlorophyll fluorometer
 

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 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

Chelsea Instruments MINItracka Fluorometer

The MINI tracka Fluorometer is an in-situ optical sensor that uses a single high intensity LED light source and, according to the manufacturer, is designed to enhance rejection of ambient daylight. The fluorometer provides a linear response between chlorophyll concentration and fluorometer voltage.

Sensor specifications, current at August 2006, are given in the table below. More information can be found at the manufacturer's specification sheet .

Sensor Specifications

  Chlorophyll-a Chlorophyll-a Rhodamine Amido Rhodamine Fluorescein
Excitation wavelengths 430/30 nm 470/30 nm 470/30 nm 425/30 nm 480/80 nm
Emission wavelength 685/30 nm 685/30 nm 590/45 nm 550/30 nm 530/30 nm
Concentration range 0.03-100 µg l -1 0.03-100 µg l -1 0.03-100 µg l -1 0.04-200 µg l -1 0.03-100 µg l -1
Resolution 0.01 µg l -1 0.01 µg l -1 0.01 µg l -1 0.025 µg l -1 0.01 µg l -1
Calibration standard Chlorophyll-a in acetone Chlorophyll-a in acetone      
  Nephelometer Phycoerythrin Phycocyanin
Excitation wavelengths 470/30 nm 530/30 nm 590/35nm
Emission wavelength 470/30 nm 580/30 nm 645/35 nm
Concentration range 0.04-100 FTU 0.03-100 µg l -1 0.03-100 µg l -1
Resolution 0.01 FTU 0.01 µg l -1 0.01 µg l -1
Mechanical   Electrical  
Body Size 149 mm long x 70 mm dia Input Voltage 7 to 40 VDC
Weight in Air 0.7 Kg Output Voltage 0 to 4 VDC (linear)
Weight in Water 0.15 Kg Power requirements 0.7 W typical
Depth Rating 600 m Signal : Noise 10,000 : 1 @ full scale

Cefas SmartBuoy data processing

This document outlines the procedures in place at Cefas in August 2005 for processing and quality assuring SmartBuoy data.

Raw data files are processed and the data move through 4 levels, starting with raw data at level 0 through to level 3, where data are fully quality-assured and expressed in appropriate units. The application of the procedures at each level result in data deemed fit to progress to the next level.

Cefas Quality Assurance (QA) Protocols

At Level 0, raw binary data files from the loggers are transferred to the network.

Automated checks - Level 1

Level 1 involves applying automated quality assurance procedures to the data. These include the following steps:

The data are now at QA status = 1.

Manual checks - Level 2

Level 1 burst mean data are now ready for manual QA procedures in order to progress to Level 2. Deployment notes are consulted for any comments on sensor performance or malfunction and post-deployment photographs of sensors, if available, are examined.

Cefas use a data visualisation tool to examine the SmartBuoy data.

Calibrations - Level 3

The combined information from Level 2 is used to determine the periods during which the data series are considered suspect. The data have now reached QA status = 2 and can progress to Level 3, where they will be fully calibrated with field-derived sample data.

The data have now reached QA status = 3 as time stamped, field calibrated burst mean data with parameter codes and units stored on SmartBuoy database with associated uncertainty or 95% confidence limits as appropriate. All SmartBuoy data banked at BODC have passed full Cefas QA procedures. Data that fail the Cefas QA checks are not submitted for banking.

SmartBuoy data processing by BODC

The following outlines the procedures that take place at BODC for banking Cefas SmartBuoy data.

BODC receives SmartBuoy data from Cefas after all quality checks have been passed and all possible calibrations applied. The data files are submitted as separate MS Excel spreadsheets for each parameter, i.e. there are separate files for temperature and salinity from the same instrument. An exact copy of the data is archived for safekeeping upon arrival.

Once the submitted data files are safely archived, the data undergo standard reformatting and banking procedures:


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) 2010-06-10
End Date (yyyy-mm-dd) 2010-07-08
Organization Undertaking ActivityNational Oceanography Centre, Liverpool
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierLB2_039 / POLRIG1099
Platform Categorymoored surface buoy

COBs Site B SmartBuoy deployment LB2_039/1099

Deployment and recovery

This mooring was deployed in a collaboration between Cefas and the POL Liverpool Bay Coastal Observatory. The rig was deployed in June 2010 during RV Prince Madog cruise PD17/10. The rig was recovered in July 2010 during RV Prince Madog cruisePD21/10.

Rig Description

The SmartBuoy carried a suite of Cefas instruments mounted just below the surface, as well as instrumentation belonging to POL upto 15 m deep. Further information is given in the table below.

The single point mooring was composed mainly of 0.5 inch long link chain, marked by a 1.8 m diameter toroid and anchored by a half tonne clump of scrap chain.

The following instruments were connected to a Eco System Monitor;

Instrument Serial
Number
Meter
depth (m)
Record
Length (days)
Owner
MiniTracka Chlorophyll Fluorometer 175064 1 28 Cefas
Falmouth Scientific OEM CT sensor 1406 1 28 Cefas
Druck 5 bar Pressure Transducer 1759544 1 30 Cefas
Seapoint Turbidity Meter 1434 1 30 Cefas

The following instruments were stand alone sensors;

Instrument Serial
Number
Meter
depth (m)
Record
Length (days)
Owner
Sea-Bird 37 MicroCAT 5434 5 30 NOC
Sea-Bird 37 MicroCAT 5792 10 30 NOC
Minilogger 2843 7.5 30 NOC
Minilogger 2849 15 30 NOC

Other Series linked to this Data Activity - 1641728 1641716 1075595 1641648 1641661

Cruise

Cruise Name PD17/10
Departure Date 2010-06-09
Arrival Date 2010-06-10
Principal Scientist(s)M John Howarth (National Oceanography Centre, Liverpool)
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 - 1075595 1090696 1090703 1624079 1641685

Other Cruises linked to this Fixed Station (with the number of series) - PD01/08 (1) PD01/11 (10) PD02/07 (1) PD02/09B (1) PD02/10 (11) 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) 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